HomeMy WebLinkAbout0345ORDINANCE NO. 345 X1966 Series)
AN ORDINANCE ADOPTING THE "NATIONAL
ELECTRICAL CODE, 1965" WITH AMEND[IENTS
BY REFERENCE
BE IT ORDAINED by the Council of the City of San Luis Obispo as follows:
SECTION 1. That Section 8300 of the San Luis Obispo N:unicipal Code shall be and
is hereby amended to read as follows:
SECTION 8300.
That all of the provisions of the "National Electrical Code, 1965,
NFPA No. 70, " as amended by the provisions of Section 8301 of the
San Luis Obispo Pfunicipal Code, three copies of which are on file in
the Office of the City Clerk, are hereby adopted and made a part of
this Ordinance as though fully set forth herein.
SECTION 2. That Section 8301 is hereby added to the San Luis Obispo iviunicipal Code
as set forth in Exhibit "A" attached hereto and hereby incorporated by reference.
SECTION 3. That this ordinance, together with the ayes and noes, shall be published
once in full, at least three days before its final passage, in the Telegram Tribune, a
newspaper published and circulated in said City, and the same shall go into effect at the
expiration of thirty days after its said final passage.
INTRODUCED AND PASSED TO PRINT this 4th day of April, 1966 by the following
roll call vote:
AYES: Emmons Blake, Frank Gallagher, Arthur F. Spring, Donald Q. Miller,
Clell W. Whelchel
NOES: None
ABSENT: None
mom
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ATTEST:
�/Y
FINALLY PASSE � this 2nd day of May , 1956,
by the following roll call vote:
AYES: Ebuaons Blake, Frank Gallagher, Arthur F. Spring,
Donald Q. Millers Clell W. Whelchel
NOES; None
ABSENT: None
ATTEST:
EXHIBIT "A"
Section 8301, San Luis Obispo Municipal Code, containing amendments to the National
Electrical Code 1965, as follows:
SAN LUIS OBISPO CITY ELECTI2IC:AL CODE
APRIL 1966
SECTION 1.
A. Adoption of National Electrical Code:
1. The National Electrical Code, 1965, NFPA No. 70, three (3) copies
of which are on file with the City Clerk, is hereby adopted by re-
ference as the Electrical Code of the City of San Luis Obispo except
as amended herein.
2. The National Electrical Code is hereinafter abbreviated to N. E. C.
B. Administration of Code:
This Code and the State of California Electrical Safety Orders shall be
administered and enforced by the Planning and Building Department.
C . Appeals:
1. Any person aggrieved by a decision of the Department may, within
five (5) days after such decision, appeal in writing to the Building
Construction Board of Appeals, which shall meet within ten (10)
days to consider such appeal.
2. A further appeal may be made in writing to the City Council within
five (5) days of the decision of the Board. Such appeal shall be heard
at the next regular meeting of the Council.
D. Discontinuance of Service:
1. The Building Department may request the Pacific Gas and Electric
Company to discontinue service to any occupancy where dangerous
wiring or equipment is in operation unless such condition is cor-
rected to the satisfaction of the Building Inspector within three (3)
days of notice served on the occupant and owner.
2. A Building Inspector may physically disconnect or cut any wires in
case of emergency where, in his opinion, immediate danger to life
or property exists.
3. Examples of Dangerous Wiring:
(a) Circuits which do not comply with the overcurrent protection
requirements of Article 240, N.E.C.
(b) Flexible cords used contrary to the requirements of Article
400, N.E.C.
(c) Wiring or conductors which are:
i. Inadequately insulated
ii. Improperly spaced from each other or the ground or
other conducting material
iii. Improperly supported
iv. Improperly grounded
SECTION 2 .
A . All electrical work within the City shall be performed by or under the
supervision of a State licensed electrical contractor, except as herein provided.
B. GENERAL. No electrical wiring, devices, appliances or equipment shall
be installed within or on any building, structure or premises nor shall any alteration or
addition be made in any such existing wiring, devices, appliances or equipment without
first securing a permit therefore from the Building Department, except as stated in the
following paragraphs, 1, 2, 3 and 4.
1. No permit shall be required for the replacement of lamps or the
connection of portable appliances to suitable receptacles which
have been permanently installed.
2. No permit shall be required for the installation, alteration or re-
pair of wiring, devices, appliances or equipment for operation of
signals or the transmission of intelligence, where such wiring,
devices, appliances or equipment operate at a voltage not exceeding
50 volts between conductors and do not include generating or trans-
forming equipment capable of supplying more than 50 watts of energy.
3. No permit shall be required for the installation, alteration or repair
of electric wiring, devices, appliances or equipment installed by a
public service corporation for the use of such a corporation in the
generation, transmission, distribution or metering of electrical
energy, or for the use of such a corporation in the operation of sig-
nals or the transmission of intelligence.
4. No permit fee shall be required for the installation of temporary
wiring for testing electrical apparatus or equipment.
Application for such permit describing the work to be done, shall be made
in writing to the Building Department by the person, firm or corporation installing the
work. The application shall be accompanied by such plans, specifications and schedules
as may be necessary to determine whether the installation as described will be in con-
formity with the requirements of this Code, and if the applicant has complied with all
provisions of this Code, a permit for such installation shall be issued; provided, however,
that the issuance of the permit shall not be taken as permission to violate any of the re-
quirements of this Code.
The permit when issued shall be for such installation as is described in the
application and no deviation shall be made from the installation so described without the
written approval of the Building Inspector.
C. Maintenance Electricians. In lieu of an individual permit for each in-
stallation or alteration, an annual permit may, upon application therefore, be issued to
any person, firm or corporation regularly employing one or more electricians for the
installation and maintenance of electric wiring, devices, appliances and equipment on
premises owned or occupied by the applicant for the permit. The application for such
annual permit shall be made in writing to the Building Inspector and shall contain a
description of the premises within which work is to be done under the permit. Within
not more than fifteen (15) days following the end of each calendar month, the person,
firm or corporation to which an annual permit is issued shall transmit to the Building
Inspector a report of all the electrical work which has been done under the annual per-
mit during the preceding month. Each annual permit shall expire on December 31 of the
year in which it is issued.
D. Special Owner's Permit. The Building Department may issue an electrical
permit for a single-family dwelling authorizing the owner to perform the work himself.
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SECTION 3.
A. Tees l'o:r Pe.1-111its' nd lnspcctiuns. Airy person dcs.i.ri,I); all cleu,trical
permit shall, at t }e time oI 1:i i.ng an app ication therefor, pay a. fcc as required in
this Section.
For issuing permits, each --------------------- - --- -- $
2.00
Dwelling outlets, receptacles, switches on new
construction up to 1000 square feet ------------------
4.00
1000 to 1500 square feet --------------------- -- - - --
6.00
1500 to 30.00'squarefeet - -- - - - - - - - - - - - - - - - - - - - - - - --
7.00
3000 to 4000 square feet --------------------- - -- - --
9.00
Additions or alterations, 8 baseplugs or 12 lights
equals 1 circuit, each $1.00, minimum --------------
2.00
For each motor of more than 1/2 hp but not
more than 5 h ------------------ - - - - --
2.50
For each motor of more than 5 hp but not
more than 15 hp ----------------------------- - - - - --
3.00
For each motor of more than 15 hp but not
more than 100 hp ------------- ------- -------- - - - - --
6.00
For each motor of more than 100 hp, per each
additional 100 h --------------- --- - - - - --
6.00
All other electrical consuming devices, 50 cents
per KVA or KW, minimum------- ,------------ - - - - --
1.00
For each meter loop or any change ------------- - - - - --
2.00
For each circuit and feeder in other than
dwelling occupancies, each ,$1.00 , minimum ---------
2.00
For each range or heater installation, each .
50 cents, minimum -------------------------- - - - - --
1.00
For each power pole (temporary and permanent) - - - - - - -
2.00
For each x-ray unit and its appurtenances - - - - - - - - - - - - -
3.00
For each extra inspection made necessary by
defective workmanship or materials -----------------
4.00
For each inspection of any electrical equipment
for which no fee is herein prescribed for the
time consumed, per hour, 1/2 hour minimum,
perhour ----------------------------------- - - - - --
5.00
Whenever any work, for which a permit is required under the provisions of this
Chapter, has been commenced without the authorization of such permit, a special in-
vestigation shall be made before a permit may be issued for such work. In addition to
the permit fee, an investigation fee shall be collected. The investigation fee shall be as
follows:
Permit Fee
$10 or less
$10 to $15
$15 to $20
More than $20
Investigation Fee
$10.00
$15.00
$20.00
$25.00
No permit shall be issued to any person, firm, corporation or political subdivision
unless all fees due are paid in full.
A fee of $10.00 shall be paid for each annual Maintenance Electrician permit at the
time when such permit is issued. Fees for all new work installed under such a permit
since the date of the last previous inspection shall be paid, according to the above schedule,
at the time when such work is inspected; these fees shall be in addition to the fee paid at
the time when the annual permit is issued.
B. Where any person, firm or corporation proposes to install, alter or repair
any electrical wiring, devices, appliances or equipment coming within the scope and
jurisdiction of this Ordinance, and such person, firm or corporation is able to and does in
fact, furnish inspection service which meets the requirements of the Building Inspector and
the rules and regulations of the Electrical Code of San Luis Obispo, and whose operations
are:
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l Subject to the jurisdiction of the California. Division of Industrial
Safety, and
2. Conducted under the continuous si.ipervis.ion of a proless.icmal.
engineer, duly registered with and licensed by the State of
California,
such person, firm or corporation shall be required only to obtain an annual permit for
which a fee of $100.00 shall be paid.
In any instance where the inspection service rendered by any person, firm, or
corporation as provided in this Section is not in accordance with the rules and regulations
of the Department of Building and /or the Building Inspector, and with the requirements of the
Electrical Code, the Building Official is hereby authorized to cancel said Annual Permit,
by giving written notice and said person, firm or corporation shall then be required to pay
the regular permit fee and to submit plans and specifications before work can be allowed
to proceed.
SECTION 4.
A. Upon completion of the work which has been authorized by issuance of any
permit, except an annual permit, it shall be the duty of the person, firm or corporation
installing the same to notify the Building Department who shall inspect the installation at
the time such notice is given or as soon thereafter as practicable. Where the. Building
Inspector finds the installation to be in conformity with the provisions of this Code, he. shall
issue to the person, firm or corporation making the installation and connection, a certifi-
cate of approval, authorizing the use of the installation and connection to the source of
supply, and shall send notice of such authorization to th e electrical utility furnishing the
electrical service. If upon inspection the installation is not found to be fully in conformity
with the provisions of this Code, the Building Inspector shall at once notify the person,
firm or corporation making the installation, stating the defects which have been found to
exist. All defects shall be corrected within ten days after inspection and notification, or
within such reasonable time as permitted by the Building Inspector. When a certificate of
approval is issued authorizing the connection and use of temporary work, such certifi-
cate shall be issued to expire at a time to be stated therein and shall be revocable by the.
Building Inspector.
When any part of a wiring installation is to be hidden from view by the
permanent placement of parts of the building, the person, firm or corporation installing
the wiring shall notify the Building Department and such parts of the wiring installation
shall not be concealed until they have been inspected and approved by the Building In-
spector; provided, that on large installations, where the concealment of parts of the
wiring proceeds continuously, the person, firm or corporation installing the wiring shall
give the Building Inspector due notice and inspections shall be made periodically during
the progress of the work. The Building Inspector shall have the power to remove, or re-
quire the removal of, any obstruction that prevents proper inspection of any electrical
equipment.
Whenever practicable the Building Inspector shall visit all premises where
work has been done under annual permits, and shall inspect all electrical wiring, devices,
appliances and equipment installed under such a permit since the date of his last previous
inspection, and shall issue a certificate of approval for such work as is found to be in
conformity with the provisions of this Code after the fee required by Section 3 has been
paid.
B. Permits issued shall have work commenced within sixty (60) days from
date of issue and shall expire eighteen (18) months from date of issue unless extended
by the Building Inspector.
C. No temporary power pole may be used to supply electricity to a building
for more than sixty (60) days after being occupied or completed.
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SE"tIVION 5.
A. Except where work is done under a Maintenance Electrician's permit,
it shall be unlawful for any person, firm or corporation to make connections from a
source of electrical energy or to supply electric service to any electric wiring, devices,
appliances or equipment for the installation of whicli a permit is required, unless such
person, firm or corporation shall have obtained satisfactory evidence from the Building
Inspector that such wiring, devices, appliances or equipment are in all respects in
conformity with all applicable legal provisions.
B. It shall be unlawful for any person, firm or corporation to make connections
from a source of electrical energy or to supply electric service to any electric wiring,
devices, appliances or equipment which has been disconnected or ordered to be discon-
cected by the Building Inspector or the use of which has been ordered by the Building In-
spector to be discontinued until a certificate of approval has been issued by him authorizing
the reconnection and use of such wiring, devices, appliances or equipment. The Building
Inspector shall notify the serving utility of such order to discontinue use.
SECTION 6.
TABLE OF GROUPS OF OCCUPANCY
OCCUPANCY DIVISION (as described by UBC)
Group
A Any assembly building with a stage and an occupant load of
1000 for more in the building.
B 1. Any assembly building with a stage and an occupant load of
less than 1000 in the building.
2. Any assembly building without a stage and having an oc-
cupant load of 300 or more in the building.
3. Any assembly building without a stage and having an oc-
cupant load of less than 300 in the building, including such
buildings used for school purposes less than four hours per
week:
4. Stadiums, reviewing stands, and amusement park structures
not included with Group A nor divisions 1, 2, and 3, Group B
Occupancies.
C Any building used for school purposes more than four hours
per week, involving assemblage for instruction, education, or
recreation, and not classed in Group A or divisions 1 and 2,
Group B, Occupancies.
D 1. Mental hospitals, jails, prisons, reformatories, houses of cor-
rection, and buildings where personal liberties of inmates
are similarly restrained.
2. Nurseries for full time care of children under kindergarten
age. Hospitals, sanitariums, mental sanitariums conforming
to Section 3319 (g), and similar buildings (each accommo-
dating more than six persons).
3. Homes for the aged and homes for children of kindergarten
age or older (each accommodating more than six persons).
E 1. Storage and handling of hazardous and highly f.larnmable
or explosive materials other than flammable liquids.
2. Storage and handling of Class 1, I1, and III flammable
liquids, as specified in U. B. C. Standard 9 -1; dr,y cleaning
plants using flammable liquids, paint stores with bulk hand-
ling; paint shops and spray painting rooms and shops.
3. Woodworking establishments, planing mills and box fac-
tories; shops, factories where loose, combustible fibres or
dust is manufactured, processed or generated; warehouses
where highly combustible material is stored.
4. Repair garages.
5. Aircraft repair hangars.
F 1. Gasoline filling and service stations, storage garages where
no repair work is done except exchange of parts and main-
tenance requiring no open flame, welding, or the use of
highly flammable liquids.
2. Wholesale and retail stores, office buildings, restaurants,
undertaking parlors, printing plants, municipal police and
fire stations, factories and workshops using materials not
highly flammable or combustible, storage and sales rooms
for combustible goods, paint stores without bulk handling.
3. Aircraft hangars where no repair work is done except ex-
change of parts and maintenance requiring no open flame,
welding, or the use of highly flammable liquids.
G Ice plants, power plants, pumping plants, cold storage, and
creameries. Factories and workshops using incombustible and
non - explosive materials.
H Hotels, apartment houses, (3 or more units), dormitories, lodg-
ing houses. Convents, monasteries (each accommodating more
than 10 persons).
I Dwellings, 1 and 2 family units.
J 1. Private garages, sheds and minor buildings used as acces-
sories only when not over one thousand square feet (1000
square feet) in area.
2. Fences over six feet (6') high, tanks and towers.
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SECTION 7.
'"YANDARDS
FOR THEI INSTALLATION OF ELECTRICAL I3QUIPMI Nf'
A. Installation: All electrical installations, industrial, commercial, and
residential in the City of San Luis Obispo shall be in conformity with the provisions of
this Ordinance, the Electrical Safety Orders of the State of California, and with
approved standards for safety to life and property. In every case where no specific
type or class of material, or no specific standards of installation are prescribed by the
Electrical Safety Orders or by this Code, conformity with the regulations as laid down
in the 1965 edition with supplement of the National Electrical Code, as approved by the
American Standards Association, shall be prima facie evidence of conformity with
approved standards for safety to life and property.
B. Listing or Labeling: As conforming to the standards of Underwriters'
Laboratories, Inc., as approved by the United States Bureau of Mines, the American
Standards Association, the United States Bureau of Standards, or other similar institu-
tions of recognized standing, shall be prima facie evidence of conformity with approved
standards of safety to life and property.
C. Used Materials: Previously used materials shall not be re -used without
the written approval obtained in advance from the Building Inspector.
D. Nameplates: The maker's nameplate, trademark, or other identification
symbol shall be placed on the outside where it is visible at time of inspection on all
electrical materials, devices, appliances, fittings, and equipment used or installed under
the provisions of this Ordinance.
E. Wiring Methods:
A through G Occupancies:
(a) All electrical wiring shall be installed in rigid metal conduit,
electrical metallic tubing, underfloor raceways of approved
insulating material, cellular metal floor raceways, surface
metal raceways, wire ways, busways, or auxiliary gutters.
(b) Flexible metal conduit may be used where it is impractical
to use any of the above methods, subject to the approval of the
Building Inspector.
2. H Occupancies:
(a) Fire Zone No. 1: Same as Section E -1 of this Section.
(b) Fire Zones No. 2 and 3: In any building with five (5) or
more dwelling units, metal conduit shall be used. Four
(4) units or less may be wired with any approved method
which.provides continuous grounding.
3. 1 and J Occupancies:
Any approved method may be used which provides continuous grounding.
4. Outlets:
All outlets shall be in approved metal boxes.
5. Non - Metallic Sheathed Cable:
(a) Section 336 -2 N. E. C. is amended to read as follows:
Construction - Non - metallic sheathed cable shall be an
approved Type NM or NMC in sizes No. 14 to 1 A.W. G . in-
clusive. In addition to the insulated conductors, the cable shall
have an approved size conductor for grounding purposes only-.—
Sub-sections (a) , (b) and (c) remain the same.
r
(b) Subsection 9 shall l:)c added to Section 3:36 -3(c) N.E.C.
to read•as hollows:
(c) Uses not permissible for either type NM or NMC
(Non - metallic sheathed cable) .
These types shall not be used as:
1. Service entrance cable
2. In commercial garages
3.
In theatres except as provided in Section
520.4
4.
In motion picture studios
5.
In storage battery rooms
6.
In hoistways
7.
In any hazardous location
8.
Embedded in poured concrete, cement or
aggregate
9.
Exposed wiring
6. Underground Conductors
. Section 339-3(c) N. E.C. is amended to reaa"as follows:
A minimum depth of twenty -four inches (24') below finished grade
shall be maintained for conductors buried directly in the earth.
Only sand or clean earth free from rock, gravel, wood or other
material which might cause damage to insulation shall be used
for backfill.
7. Non - Metallic Boxes Prohibited
Section 370-3 N.E.C. is amended to read as follows:
Non - metallic boxes shall not be used.
8. Extension Cords: The use of extension cords is prohibited except
on a temporary basis, such as Christmas tree lighting. An approved
receptacle shall be installed within six (6) feet of any permanent
appliance or fixture.
9. Grounding at Boxes: (Amendments to 250- 144(a) and 250 -74 N.E.C.)
(a) Each grounding conductor shall be securely fixed to a
metallic box by means of a grounding screw or other
approved device, which shall be used for no other purpose,
(b) Alternatively, a group of grounding conductors shall be
securely fastened together by means of a pressure connector
and grounded to the box by means of a common conductor
fixed according to paragraph (a) .
(c) A grounding connection shall be made between each receptacle
grounding terminal and the outlet box according to Section
2 50 -74 N.E.C.
F . Galvanized or sheradized rigid metal conduit shall be required in or under
concrete or masonry floors or walls in contact with the earth or fill. Other approved
conduit may be used if encased in at least two inches (2 ") of concrete.
G. Mixed Occupancy: In mixed occupancies, the most restrictive type wiring
shall prevail throughout the building.
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SECTION 8.
ALTERATIONS AND ADDITIONS
A. Any alteration or addition to an existing installation shall conform to the
requirements of this Code.
B. When a building is remodelled or extended to the extent of twice its
assessed valuation, or the total electrical load is increased by more than fifty percent
(5090, the whole electrical system shall be brought up to the requirements of this Code.
C. When the occupancy classification of a building changes, the electrical
system of the portion affected shall be brought up to the requirements for the new
occupancy.
SECTION 9.
SERVICE ENTRANCE REQUIREMENTS
A. Location of Service Heads: Underground or overhead service to a building
shall conform to N. .C. 230 and the rules of Pacific Gas and Electric Company on file
with the Public Utilities Commission.
(B) 1. In buildings served at not over 150 volts to ground, a single
set of service entrance conductors may be run not to exceed six (6)
sets of metering equipment on any occupancy if grouped at the point
of entrance. For any occupancy or installations involving more than
6 sets of metering switches at not over 150 volts to ground, the entire
current shall be taken through one main service switch. No service
switch shall be located more than six feet six inches (6 ft. 6 in.) to
the handle in the ON position above the floor or ground level.
2. An approved service entrance switch or breaker shall be in-
stalled for each service meter installation on the load side of the
meter; service switch or breaker shall be located on the exterior of
building at the nearest safe and readily accessible point to where
the service conductors enter the building.
Exception: On buildings of a commercial or industrial type that
are normally open during an average business dav, the service switch,
breaker and /or meter may be installed within the building if meet-
ing the requirements of the power serving agency.
(C) Method of installation of service. Every service shall be in-
stalled in rigid metal conduit and in accordance with Section 9 -D of
this Code, and all service equipment, conduits, and fittings installed
on the exterior of any building shall be listed and approved by a
recognized testing laboratory as rain - tight.
(D) 1. Size of service conduits.
a. Service conduits (single family dwelling, "I" occupancy) —
The minimum size of service conduits in single family dwell-
ings of over 800 square feet shall be one and one - quarter (11/4)
inch trade size.
b. Service conduits (All other occupancies, including "I" oc-
cupancy if 800 sq. ft. or under)— Service conduit shall be a
minimum of one inch (1 ").
c. Exposed service conduits: (For signs, temp. poles, and
similar installations) —The minimum size for exposed service
conduits shall be not less in size than that required for the
conductors installed therein and in no case smaller than three
quarter ( % ) inch trade size.
2. Service Conductors
a. Single family dwellings, Group "I ", (over 800 sq. ft. —The
minimum service conductors shall he not less than No. 2,
A.W.G. (Exception: See Section 9- D -2C).
b. Service conductors (All other occupancies) —The minimum
size service conductors shall be No. 6, A. W. G.
c. Existing buildings where additions or alterations occur
which require added load capacity, shall be provided with a
new service equipment and wire size of adequate capacity to
serve the intended load but in no case less than No. 6 con-
ductors AWG and 1" conduit.
3. Service Entrance Switches, Breakers, or Panels.
a. Service entrance switches, breakers, or panels (Single fami-
ly dwellings, Group "I" over 800 sq. ft.), — The minimum size
switch, breaker or panel shall have a capacity rating of 100
amperes. (Exception: See Section 9- D -3D.)
b. Service entrance switches, breakers, or panels (All other
occupancies) — The minimum size switch, breaker, or panel
shall be 60 ampere capacity for fused switch or 50 ampere
capacity for breakers.
c. Service entrance panels, Group "I" (Over 800 sq. ft.) — Pro-
vision shall be made in the service entrance panel for a mini-
mum of 8 single pole and 2 double pole overcurrent protection
devices in addition to the main overcurrent device.
d. Existing buildings where additions or alterations occur
which require added main service capacity, shall be provided
with a new service entrance switch, breaker or panel, of ade-
quate capacity to serve the intended load but in no case less
than 60 amperes if a switch is used, or 50 amperes if a breaker
is used.
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E . Two and three wire service. All ,,single phase lighting loads of less than
3300 watts or not more than two )-, two ) wired ircuits may be served by two (2)
wires. Where an installation has been wired and arranged for three (3) wire service,
no two (2) wire energy supply for two (2) wire service shall be connected thereto with-
out the written approval obtained in advance from the Building Inspector.
SECTION 10.
BRANCH CIRCUIT REQUIREMENTS FOR HOUSE WIRING
A. General Requirements: Each dwelling unit shall have lighting and appliance
circuits as required by Section 220- N.E.C.
Exception: Each dwelling unit shall have not less than one general lighting
branch circuit for each 500 square feet. or fraction thereof of floor area.
B. Major Appliances: Dishwashers, washing machines, clothes dryers,
garbage disposals, hood fans, forced air furnaces and any other fixed appliance shall be
installed each on a separate appliance branch circuit, except that two (2) or more devices
totaling not more than 1650 watts may be installed on a single circuit of not less than 20
ampere capacity, and each such circuit shall terminate in a metal box With a polarized
receptacle.
Minimum Requirements for Domestic Electric Ranges
and Clothes Dryers
(1) Standard range with oven ................. ........... *3—No. 6 A. W. G.
(2) Cooking units with separate oven
(a) 4 elements or less .......... .................. ...... *3—No. 10 A. W. G.
(b) Separate ovens --4.6 KW or less ..... .---- *3—No. 10 A. W. G.
(1) Clothes Dryers — 4.7 KW or less ............... . *3 —No. 10 A. W. G.
*Exception: When nameplate amerage, rating is certified to this department in
writing, the circuit wiring then may be installed in accordance with the certified rating.
C . Receptacle Outlets: Section 210 -22 N. E. C. is amended to read as follows:
In every kitchen, dining room, breakfast room, living room, parlor,
library, den, sun room, recreation room and bedroom, receptacle outlets shall be in-
stalled so that no point along the floor line in any wall space is more than six (6) feet,
measured horizontally, from an outlet in that space, including any wall space two (2)
feet wide or greater, and the wall space occupied by sliding panels in exterior walls.
The receptacle outlets shall, insofar as practicable, be spaced equal distances apart.
Receptacle outlets in floor shall not be counted as part of the required number of re-
ceptacle outlets unless located within twelve (12) inches of the wall. At least one out-
let shall be installed for the lawn .
D. Lighting Outlets: Each room listed in Section C above shall have at least
one switched general lighting outlet.
E . Clothes Closets: Fixtures shall be installed as provided by 410 -8 N. E. C.
F . Other Lighting Outlets: Lighting outlets in attics, basements, private
garages, and accessory buildings to dwellings may be supplied by receptacle circuits.
G . Furnace Lighting: A switched light outlet shall be provided at every
horizontal furnace location. The switch shall be located ahead of the passage opening.
H . Spare Circuits: In each dwelling unit approved raceways or suitable wiring
shall be provided for all spare remaining circuits to an accessible location as prescribed
by the Building Inspector, unless all appliances listed in Section B are wired in during
construction.
I. Circuit Outlets: Lighting branch circuits shall be installed with not more
than twelve (12 ) outlets on #14 AWG copper conductors. Convenience outlet branch cir-
cuits shall be installed with not more than eight (8) receptacles on 912 AWG copper
conductors.
SECTION 11
CALCULATION OF LOAD
(A) Voltage drop. Every interior system of wiring for light and
heat installation shall be so installed as not to exceed three (3) per
cent voltage drop over all and for power installations not to exceed
five •(5) per cent voltage drop over all.
(B) 1. General lighting for general illumination. In the occu-
pancies listed in the table in C -3 of this section, a load of not less than
the unit load of column A shall be included for each square foot
of floor area.
In determining the load on the "Watts per square foot' basis, the
floor area shall be computed from the outside dimensions of the
building, apartment, or area involved, and the number of floors, not
including open porches, garages, in connection with dwelling occu-
pancies, nor unfinished spaces in basements or attics of dwellings.
. All convenience outlets of 20 amp. or less rating in single - family
and multi - family dwellings and in guest rooms of hotels (except
those connected to the appliance circuits specified) may be consid-
ered as outlets for general illumination, no additional load need be
included for such outlets.
2. Other loads: For lighting other than general illumination and
for appliances other than motors, a load of not less than the unit
load specified below shall be included for each outlet:
Outlets supplying specific appliances
and other loads ......... ...... ....... .................. Amp. rating of appliance
Outlets supplying heavy duty lamp holders ....................5 amperes
*Other holders ............................................ - ----------- ----- -.....1' /z amperes
3. Exceptions: The minimum loads for outlets paragraph 2 shall
be modified as follows:
a. Ranges. For household electric ranges, the branch circuit
load may be computed in accordance with subsection 6 of this
section.
b. Show window lighting. For show window lighting, a load
of not less than 200 watts per linear foot of show window, meas-
ured horizontally along its base, may be allowed in lieu of the
specified load per outlet.
c. Multi- outlet assemblies. Where fixed multi - outlet assem-
blies are employed, each five feet or fraction thereof of each
separate and continuous length shall be considered as one out-
let of not less than 1' /2 ampere capacity; except in locations
where a number of appliances are likely to be used simultan-
eously, then each one foot or fraction thereof shall be considered
as one outlet of not less than 1' /2 ampere.
(C) Feeders, unit loads and demand factors.
1. Computation of load currents. Current carrying capacity for
various voltages shall be computed as follows: Line voltage
between 100 and 125 volts shall be computed as 120 volts; line
voltage between 210 and 250 volts shall be computed as 240
volts. Three phase 4 wire lighting shall be computed 120.208
volts.
2. Circuit Ratings in Dwellings. On a two -wire and on each side
of a three -wire general lighting branch circuit, the total con-
nected load shall not exceed fifteen amperes (15 amp.).
*Note: This provision not applicable to receptacle outlets provided
for the connection of fixed lighting units to facilitate servicing and
replacement.
On a two -wire and on each stde'of three -wire convenience outlet
and /or appliance circuit, the total convenience load shall not
exceed twenty amperes (20 amp.).
3. Calculation of load: The computed load of a feeder shall not
be less than the sum of all branch circuit loads supplied by the
feeder.
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Hotels, including apt. houses without
provisions for cooking by tenants - -2*
Industrial Commercial
(loft) buildings --- ------- --- ------- --- - - - - -2
Lodge rooms .................................. ---1 1/2
Office buildings ................................ 3
Restaurants -------•-•-- •------- --- --- ------••---2
Schools-------------- ---- -- --- -------- ----- ----- -- -3
Stores.............................................. 3
Warehouse Storage .... ................. . . . .. 1/.
In any of the above occupancies ex-
cept single - family dwellings and
individual apartments of multi-
family dwellings:
Assembly halls and auditorium ....... -I
Halls, corridors, closets,
Storage spaces 1/7
20,000 or less ---- -- --- --- ---- ---- - --- - ----- 50% .
next 80,000 -- ------- --- --------- -- - ---- 40%
over 100,000 ------ ------ ------ ---- - -- - -- 30%
Total wattage
... ..... ...... ........ . . .. ....100%
Total wattage
General lighting - -- the donutlll(I
fr'`1 sptwilied Ilk this
IIaI'�I-
' graph 11111V I)(' applied h) the C11111plitc(l
hl7l lll'I1 l'in'liit load for gull
r;ll
iltunlitlal loll: (0,t'c 'Cable foll(;kwillg.)
�-
-- ---------- ----- ------- -- ----100 %
UNIT LOADS AND FEEDER DEMAND FACTORS
........ .......... ...... ...... 50%
COL. A
COL. B
12,500 or less
Type of Unit load per
Load to which demand
Demand
Occupancy Sq. Ft. (watts)
factor applies (watts)
Factor
Armories and Auditoriums ---- ------- - - - - -1
Total wattage ...... -- ......................
100 %
Banks ........................ ... ... ................2
Total wattage --------------- ........... --
-100 %
Barber Shops and Beauty Parlors ......3
Total wattage ......................... .....100%
Churches ............ .... ......................:...1
Total wattage .................... ........ --•
100
Clubs ....... .... ........... ............ .. ...... •--..2*
Total wattage ... .....- ....................
- 100' %,
Court rooms ........ ..............................2
Total wottogo ,-.. ....... ...... --' ..... ....
100' %,
Dwellings — Single family .. ....... .....3*
2.500 or less ...... . ........... -. ............
100%
34
over 2500 .. ........... ...................
30 %
Dwellings — Multi- family
(other than Motels) .. ............ .......3*
3000 or less ..............-- ...- ...........
-100
next 117,000 . ....... ..... ...... .. .. .
.. 35%
over 120,000 :....... ....... ..... ....
.. 25
Garages — Commercial
(storage) ...................................... 1/2
Total wattage .. ...... ....... ..... . . . . .. ....100%
Hospitals .......................................... 2
50,000 or less ....... --.....................
40%
over 50,000 .. ......... ...... ... .. .. . ...
20%
Hotels, including apt. houses without
provisions for cooking by tenants - -2*
Industrial Commercial
(loft) buildings --- ------- --- ------- --- - - - - -2
Lodge rooms .................................. ---1 1/2
Office buildings ................................ 3
Restaurants -------•-•-- •------- --- --- ------••---2
Schools-------------- ---- -- --- -------- ----- ----- -- -3
Stores.............................................. 3
Warehouse Storage .... ................. . . . .. 1/.
In any of the above occupancies ex-
cept single - family dwellings and
individual apartments of multi-
family dwellings:
Assembly halls and auditorium ....... -I
Halls, corridors, closets,
Storage spaces 1/7
20,000 or less ---- -- --- --- ---- ---- - --- - ----- 50% .
next 80,000 -- ------- --- --------- -- - ---- 40%
over 100,000 ------ ------ ------ ---- - -- - -- 30%
Total wattage
... ..... ...... ........ . . .. ....100%
Total wattage
---- ------ ------ ---- -- --- - -- --100 %
20,000 or less
-- -------- --------- -- - - - ---- --100 %
over 20,000
............................ 70%
Total wattage
-------- -------------- - - - - -- --100 %
15,000, or less
-- ---------- ----- ------- -- ----100 %
over 15,000
........ .......... ...... ...... 50%
Total wattage
..... . .......... .............. 100 %
12,500 or less
.. .................. .......... 100%
over 12,500
- ---_ --------- --- ---- - - - - -- 50%
Total wattage as specified for the
specific occupancy.
*For sub - feeders to areas in hospitals and hotels where entire lighting
is likely to be used at one time: as in operating rooms, ballrooms,
dining rooms, etc., a demand factor of 100 per cent shall be .used. The
small appliance load as specified in sub - paragraph B -2 and the com-
puted branch circuit load for receptacle outlets in other than dwelling
occupancies for which the allowance is not more than 11/2 amperes
per outlet, may be included with the general lighting load and sub-
ject to the demand factor in paragraph C of this Section.
4. Heating appliances in dwellings. Any heating appliance in a
dwelling rated at more than 1650 watts shall be wired for not less
than 220 volts. If such heating appliance is portable, the receptacle
shall be of a suitable capacity. Heavy duty heater branch circuits
may be two -wire derived from either a 120 -240 volt single-phase
source, or a 220 volt source. The tap from such circuit to the heating
appliances shall in no case be less than No. 12 A. W. G. wire nor over
eighteen (18 ") inches in length. All ungrounded conductors shall be
switched at each heating appliance. Only those conductors supply-
ing a fixed heater shall enter a heater enclosure, all such conductors
shall enter through the bottom of such enclosures.
This sub - division shall not be construed to permit heaters for
different apartments or occupancies being connected to the same
circuit.
5. Water heaters, Space heaters, Dryers, and Air - conditioning. De-
mand factors may be applied to reduce the size of service, feeders,
and, subfeeders in dwellings and apartment houses supplying the
following type of load: Water heaters, space heaters, dryers and air -
conditioning devices of 2000 watts or over as follows:
No, of units
% demand
1 -2
100
3 -5
85
6 -10
70
11 -20
60
21 -35
50
36 -60
50
61 -100
35
over 100
30
6. Demand- Factor for electrical ranges. The values in the table
below apply to one or more cooking and baking appliances but are
not applicable to other appliances.
Ranges over 1650 watts
Ranges
No. of ranges and under 3500 watts
over 3500 watts
1 80
80
2 75
65
3 70
55
4 66
50
5 62
45
6 59
43
7 56
40
8 53
36
9 51
35
10 49
34
Unless statements are filed in writing from the owner or author-
ized agent stating capacity of ranges, each range shall be figured
at not less than 12 KW.
-1.1-
SECTION 12
(A) Extra circuit capacity shall be provided at the panel for show
window circuits and metal raceways provided from the panel to the
window.
(B) A sign circuit shall be provided and installed to an accessible
location at the front of all commercial and store building occupancies.
The sign circuit and /or outlet shall be controlled by a switch located
within sight of the sign and /or outlet, or by a lock type switch if
out of sight of sign. The maximum loading of such circuits shall
not exceed four (4) transformers of 1650 V. A. All transformers shall
comply with Article 28, par. 2552 '(d) of the Electrical Safety Orders
of the State of California.
(C) Location of branch circuit protective devices or panels. Branch
Circuit Panel shall be installed for each occupancy in the interior
thereof except, in single family dwellings. Nothing contained in this
Code shall be deemed or construed to permit the installation of any
electrical device, outlet or circuit in any occupancy, the control of
or the protection of which is not accessible to the occupant at all
times except, remodeled existing occupancies wherein the occupancy
is changed to a different classification as defined by "Table of Groups
of Occupancy." then protective devices may be located at one central
point. No parts of any circuit shall supply electrical energy to more
than one (1) o cuppancy. No branch circuit protective devices shall
be installed M.DaMooms, clothes closets or water heater compart-
ments.
(D) Community buildings and laundry locations: Calculations
for feeders or service for above buildings shall be based on the table.
in Section 11 C -3, of this Code. No more than two (2) convenience
outlets per circuit at ironing board locations.
E . Branch Circuit Loads - Store Li haing: Where in normal operation, the
maximum load of a branch circuit will continue for a long period of time, such as store
lighting and similar loads, the minimum unit load specified shall be increased by twenty -
five per cent (25m .
SECTION 13
GASEOUS TUBE LIGHTS
Each fluorescent fixture, mercury vapor fixture or high voltage
gas tube light or sign shall be provided with a fixed nameplate legi-
ble after installation which shall correctly stage the manufacturer's
name or trade mark, and the voltage, amperage, total watts and
power factor. No such equipment shall be installed in which the
power factor is less than 90 per cent. All above listed equipment
shall have an Underwriters Laboratory Label or a recognized testing
laboratory label. Every such light or sign shall be effectively ground-
ed, either by a permanent and approved metallic connection to a
grounded circuit system or by a flexible cord one conductor of which
shall be a grounding conductor connected to a separate blade of a
polarized attachment cap in such manner that a grounding connec-
tion is made when such cap is inserted into a polarized plug.
SECTION 14
EMERGENCY AND EXIT LIGHTING REQUIREMENTS
(A) Exit illumination: Required exits shall be illuminated at all
times with light having an intensity of not less than one foot candle
at floor level.
(B) Exit signs: At every exit doorway, and wherever otherwise
required to clearly indicate the direction of egress an exit sign with
letters at least five inches (5") high shall be provided from all areas
serving the occupant load specified in this sub - section. In interior
stairways the floor level leading direct to the exterior shall be
clearly indicated.
1. Groups B, C, D, and H, with an occupancy load of more than
50.
2. All other occupancies serving an occupant load of more than
100.
(C) Illumination of signs: Exit signs shall be lighted in the fol-
lowing occupancies with two electric lamps of not less than 15 watts
each in the manner specified in this Sub - section.
1. Two separate sources of supply shall be required for Group
"A" occupancies and Divisions 1 and 2 of Group "B" except
buildings with occupant loads of less than 750 persons used
as churches, lodge rooms, recreation halls and gymnasiums.
2. Separate circuits, one of which shall be separate from all
other circuits in the building, shall be required for the follow-
ing occupancies:
a. Groups A, B, and C occupancies with an occupant load
over 300 persons and not otherwise regulated in this sub-
section.
b. Groups D and H occupancies with an occupant load of over
100 persons.
c. Group F occupancies with an occupant load over 1,000
persons.
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I
SECTION 16
Every person, firm or corporation violating any of the provisions
of this Code shall be deemed guilty of a separate offense for each day
or portion thereof during which such violation continued and each
such unlawful act shall constitute a misdemeanor and shall be pun-
ishable as described in Section 1200 of the San Luis Obispo Municipal
Code.
SECTION 17
It is unlawful for any person, firm or corporation, either as owner,
architect, contractor, artisan or otherwise, to do or knowingly to
cause or permit to be done any electrical wiring as defined in this
Code in such manner that the same shall not conform to all of the
provisions of this Code.
SECTION 18
If any section, sub - section, sentence, clause or phrase of this
ordinance is, for any reason, held to , be unconstitutional or legally
ineffective, such decision shall not affect the validity of the remain-
ing portions of this Ordinance. The City Council of the City of San
Luis Obispo declares that it would have adopted this ordinance and
each section, sub - section, sentence, clause or phrase thereof, irrespec-
tive of the fact that any one or more sections, sub- sections, sentences,
clauses or phrases be declared unconstitutional or legally ineffective.
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