ARTICLE VIII. NATIONAL ELECTRICAL CODE
Sec.
8-800. Adopted; where filed; amendments.
(a) That
certain document known as the "National Electrical Code, 2008 Edition,"
which has been published as a code in book form by the National Fire Protection
Association entitled "National Electrical Code, N.F.P.A. No. 70 - 2008
Edition," Article 90 and chapters one through eight, three (3) copies with
amendments of which are on file in the office of the city clerk, and this same
code is hereby referred to, adopted and made a part hereof, as if fully set out
in this article.
(b) The provisions of this article, other than
subsections (a) and (b) of this section, are amendments to the National
Electrical Code as now or hereafter adopted in subsection (a). All sections in this article, other than
subsections (a) and (b) of this section, shall be considered to be both a part
of this code and a part of the National Electrical Code.
(Ord.
No. 2008.72, 12-11-08)
Charter
reference—Adoption
by reference, § 2.14.
State law
reference—Adoption
by reference, A.R.S. § 9-801 et seq.
Art. 110.
Requirements for electrical installations.
Article 110.7
is hereby amended as follows:
110.7. Wiring integrity. Completed wiring
installations shall be free from short circuits, ground faults, or any
connections to ground other than those required or permitted elsewhere in this code.
All equipment rated at one thousand (1,000) amperes or more shall be tested
in conformance with UL Standard 869 or 891 for insulation breakdown prior to
its being energized. This test shall be performed by an independent testing
facility or agency approved by the authority having jurisdiction.
(Ord.
No. 2008.72, 12-11-08)
Art. 210.
Branch circuits.
Article 210.5, Identification for branch circuits, is hereby amended by adding
section (D) as follows:
210.5(D). Color code. Where fifteen (15), twenty
(20), or thirty (30) ampere branch circuits requiring a neutral, are installed
in raceways, the conductors of branch circuits connected to the same system
shall conform to the following color code:
|
Volts |
Phase |
System |
Phase
A |
Phase
B |
Phase
C |
Neutral |
|
120/208 |
3 |
Wye |
Black |
Red |
Blue |
White |
|
277/480 |
3 |
Wye |
Brown |
|
Yellow |
Gray |
|
120/240 |
3 |
Delta |
Black |
|
Blue
or Red |
White |
EXCEPTIONS:
1. The above
color coding is not required in residential occupancies.
2. Industrial
occupancies holding their own maintenance license may use their own color
coding system.
3. Conductors
of listed cable assemblies shall be permitted to be permanently re‑identified
at the time of installation by distinctive markings at each outlet or
termination where the conductor is visible and accessible; such as, six (6)
inch (152 mm) taping or other effective means.
4. Additions to an existing electrical system, where an
acceptable color coding system exists, the existing color coding system shall
be continued.
(Ord. No. 2008.72, 12-11-08)
Art. 220.
Branch-circuit, feeder, and service calculations.
Article 220.82, Dwelling unit, is hereby amended by adding subsection (B)(5) as
follows:
220.82(B)(5).
For purposes of calculations and installation requirements, the
following loads and branch circuit requirements may be used where the actual
nameplate rating is not available.
|
LOAD |
CONDUCTOR
AMPACITY |
SINGLE
PHASE NOMINAL VOLTAGE |
|
|
Electric Clothes Dryer |
5000 VA |
30 Ampere |
(120/240V) |
|
Water Heater |
4500 VA |
30 Ampere |
(240V) |
|
Dishwasher |
1500 VA |
20 Ampere |
(120V) |
|
Garbage Disposal |
720 VA |
20 Ampere |
(120V) |
|
Evaporative Cooler |
1200 VA |
20 Ampere |
(120V) |
|
Compactor |
1500 VA |
20 Ampere |
(120V) |
|
Wall Mounted Oven Or
Counter Mounted Cooking Units |
6000 VA |
30 Ampere |
(120/240V) |
|
Range |
12000 VA |
50 Ampere |
(120/240V) |
|
Gas Fired Clothes
Dryer |
1500 VA |
20 Ampere |
(120V) |
|
Clothes Washer |
1500 VA |
20 Ampere |
(120V) |
|
Microwave Ovens
(Fixed) |
1200 VA |
20 Ampere |
(120V) |
Note: The above calculations are without
appropriate NEC demands, which may be taken where permitted in the NEC.
If appliances are installed having higher
nameplate ratings than the minimum loads specified above, the conductors shall
be increased to the proper size. Where limited storage capacity water heaters
are specified, the nameplate rating of the unit(s) shall be used.
(Ord.
No. 2008.72, 12-11-08)
Art. 225.
Outside branch circuits and feeders.
Article 225.32, Location, is hereby amended by adding Exception 5 as follows:
EXCEPTION
NO. 5: For free-standing canopies,
carports, towers, and similar structures; a branch circuit disconnecting means
shall be permitted to be located elsewhere on the premises. A grounding electrode conductor sized
per 250.66 shall be run with the circuit conductors.
(Ord.
No. 2008.72, 12-11-08)
Art. 230.
Services.
Article 230.28 is hereby amended as follows:
230.28. Service masts as supports. Where
a service mast is used for the support of service-drop conductors, it shall be
of adequate strength. The service mast
shall be rigid steel conduit or intermediate metal conduit, not less than one
and one-half (1-1/2) inch trade size, and shall not contain any coupling(s)
which would be subject to strain by the service-drop. Where the service-drop
point of attachment exceeds eighteen (18) inches (457 mm) above the roof or
thirty (30) inches (762 mm) above the final raceway support, the service mast
shall be supported by braces or
guys to withstand safely the strain imposed by the service-drop. Where
raceway-type service masts are used, all raeway fittings shall be identified
for use with service masts. Only power
service-drop conductors shall be permitted to be attached to a service mast.
(FPN):
Lag screws are not acceptable.
See local electrical utility specifications.
Article 230.43 is hereby amended as
follows:
230.43. Wiring methods for 600 volts, nominal, or
less. Service-entrance conductors
shall be installed in accordance with the applicable requirements of this code
covering the type of wiring method used and shall be limited to the following
methods:
(1) Rigid
metal conduit
(2) Intermediate
metal conduit
(3) Wireways
(4) Busways
(5) Auxiliary
gutters
(6) Rigid
non-metalic conduit may be used underground
(7) Schedule 80 rigid non-metalic conduit may
extend above ground to the service equipment.
(FPN): Refer to the electric utility
requirements for additional information on installing service-entrance
conductors on or within buildings and underground serving the premises.
Article 230.70(A)(1) is hereby amended as
follows:
230.70(A)(1).
Readily accessible location. The
service disconnecting means shall be installed at a readily accessible location
either outside of a building or structure, or inside nearest the point of
entrance of the service conductors. The
service disconnecting means shall be installed adjacent to and accessible from
the same working area as the utility meter.
All service disconnecting means located
inside a building shall be enclosed within a room or space separated from the
rest of the building by not less than a one-hour fire-resistive fire barrier.
Exceptions:
1. Open parking
structures.
2. The ceiling of this service entrance room may be constructed as
required for a one-hour wall assembly with protected openings. For the purpose of this section only, a
one-hour rated wall assembly may be used in a horizontal position.
(Ord. No. 2008.72, 12-11-08)
Art.
250. Grounding and bonding.
Article 250.118 is hereby amended as
follows:
250.118. Types of equipment grounding conductors. The equipment grounding conductor run
with or enclosing the circuit
conductors shall be one or more or a combination of the following:
(1)
A copper or other corrosion-resistant conductor. This conductor shall be
solid or stranded; insulated, covered, or bare; and in the form of a wire or a
busbar of any shape.
(2) Rigid
metal conduit with an individual equipment grounding conductor.
(3) Intermediate
metal conduit with an individual equipment grounding conductor.
(4) Electrical
metallic tubing with an individual equipment grounding conductor.
(5) Flexible
metal conduit with an individual equipment grounding conductor.
(6) Type
AC cable with an individual equipment grounding conductor.
(7) The
copper sheath of mineral-insulated, metal-sheathed cable.
(8) Type
MC cable with an individual equipment grounding conductor.
(9) Cable
trays as permitted in 392.7.
(10) Cablebus
framework as permitted in 370.3.
(11) Other
electrically continuous metal raceways listed for grounding.
(Ord.
No. 2008.72, 12-11-08)
Art. 310.
Conductors for general wiring.
Article 310.15(B)(6) is hereby amended as follows:
310.15(B)(6). 120/240-volt, 3-wire, single-phase dwelling services and feeders. For individual dwelling units of one-family, two-family, and multi-family dwellings, conductors, as listed in Table 310.15(B)(6), shall be permitted as 120/240-volt, 3-wire, single-phase service-entrance conductors, service lateral conductors, and feeder conductors that serve as the main power feeder to a dwelling unit and are installed in raceway or cable with or without an equipment grounding conductor. For application of this section, the main power feeder shall be in the feeder between the main disconnect and the panelboard that supplies, either by branch circuits or by feeders, or both, all loads that are part or associated with the dwelling unit. The feeder conductors to a dwelling unit shall not be required to have an allowable ampacity rating greater than their service-entrance conductors. The grounded conductor shall be permitted to be smaller than the ungrounded conductors, provided the requirements of 215.2, 220.61, and 230.42 are met.
|
Conductor Types and Sizes RHH RHW RHW-2 THHN THHW
THW THW-2 THWN THWN-2 XHHW XHHW-2 SE USE USE-2 |
||
|
Copper |
Aluminum or Copper-Clad Aluminum |
Service or Feeder Rating
in Amps > 30oC (86oF) |
|
AWG |
AWG |
|
|
4 |
2 |
— |
|
3 |
1 |
— |
|
2 |
1/0 |
100 |
|
1 |
2/0 |
125 |
|
1/0 |
3/0 |
150 |
|
2/0 |
4/0 |
175 |
|
3/0 |
250
kcmil |
200 |
|
4/0 |
300
kcmil |
225 |
|
250
kcmil |
350
kcmil |
250 |
|
350
kcmil |
500
kcmil |
300 |
|
400
kcmil |
600
kcmil |
350 |
|
500
kcmil |
750
kcmil |
400 |
(Ord. No. 2008.72, 12-11-08)
Art. 334.
Nonmetallic-sheathed cable: Types NM, NMC, and NMS.
Article 334.10 is hereby amended as
follows:
334.10. Uses permitted.
(1) One-
and two-family dwellings and their accessory structures.
(2) Within the dwelling units of multifamily
dwellings permitted to be Types III, IV, and V construction except as
prohibited in 334.12.
(3) Cable trays in structures permitted to be
Types III, IV, and V where cables are identified for the use.
(Ord. No. 2008.72, 12-11-08)
Art. 348.
Flexible metal conduit: Type FMC.
Article 348.60 is hereby amended as
follows:
348.60. Grounding. Flexible metal conduit
shall provide an adequate path for equipment grounding as required by 250.118.
(Ord.
No. 2008.72, 12-11-08)
Art. 350.
Liquidtight flexible metal conduit: Type LFMC.
Article 350.60 is hereby amended as follows:
350.60. Grounding.
Liquidtight flexible metal conduit shall provide an adequate path for equipment
grounding as required by 250.118.
(Ord.
No. 2008.72, 12-11-08)
Art. 501.
Class I locations.
Article 501.30(B) is hereby amended as
follows:
501.30(B). Types of equipment grounding conductors. Where flexible metal conduit or liquidtight
flexible metal conduit is used as permitted in 501.10(B)(2) and is to be relied
upon to complete a sole equipment grounding path, it shall be installed with
internal or external bonding jumpers in parallel with each conduit and
complying with 250.102.
(Ord.
No. 2008.72, 12-11-08)
Art. 502.
Class II locations.
Article 502.30(B) is hereby amended as
follows:
502.30(B). Types of equipment grounding conductors. Where flexible conduit is used as permitted
in 502.10, it shall be installed with internal or external bonding jumpers in
parallel with each conduit and complying with 250.102.
(Ord.
No. 2008.72, 12-11-08)
Art. 503.
Class III locations.
Article 503.30(B) is hereby amended as
follows:
503.30(B). Types of equipment grounding conductors. Where flexible conduit is used as permitted
in 503.10, it shall be installed with internal or external bonding jumpers in
parallel with each conduit and complying with 250.102.
(Ord.
No. 2008.72, 12-11-08)
Art. 680.
Swimming pools, fountains, and similar installations.
Article 680 is hereby amended by adding
Article 680.13 as follows:
680.13.
Mechanical and electrical equipment location. Mechanical and electrical
equipment not addressed in other sections in Article 680, shall not be permitted
within the area extending six (6) feet (1.83 m) horizontally from the inside
wall of the pool.
EXCEPTION:
Listed swimming pool covers where the electrical equipment is part of
the total assembly.
(FPN):
In determining the above dimension the distance to be measured is the
shortest path to the equipment without piercing a floor, wall, ceiling, doorway
with hinged or sliding door, window opening, or other similar effective permanent barrier.
(Ord.
No. 2008.72, 12-11-08)
Art.
725. Class 1, Class 2, and Class 3
remote-control, signaling, and power-limited circuits.
Article 725 is hereby amended by adding
Article 725.32 as follows:
725.32.
(Ord.
No. 2008.72, 12-11-08)
Secs.
8-801—8-899. Reserved.