Luminaires and Lamp Holder Electrical Code in Phoenix
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ARTICLE 410 Luminaires, Lampholders, and Lamps
I. General
410.1 Scope. This article covers luminaires, portable luminaires, lampholders, pendants, incandescent
filament lamps, arc lamps, electric-discharge lamps, decorative lighting products, lighting accessories for temporary
seasonal and holiday use, portable flexible lighting products, and the wiring and equipment forming part of such products and
lighting installations.
410.2 Definition.
Closet Storage Space. The volume bounded by the sides and back closet walls and
planes extending from the closet floor vertically to a height of 1.8 m (6 ft) or to the highest clothes-hanging rod and
parallel to the walls at a horizontal distance of 600 mm (24 in.) from the sides and back of the closet walls,
respectively, and continuing vertically to the closet ceiling parallel to the walls at a horizontal distance of 300 mm
(12 in.) or the width of the shelf, whichever is greater; for a closet that permits access to both sides of a hanging
rod, this space includes the volume below the highest rod extending 300 mm (12 in.) on either side of the rod on a
plane horizontal to the floor extending the entire length of the rod. See Figure 410.2.
410.5 Live Parts. Luminaires, portable luminaires, lampholders, and lamps shall have no live parts
normally exposed to contact. Exposed accessible terminals in lampholders and switches shall not be installed in metal
luminaire canopies or in open bases of portable table or floor luminaires.
Exception: Cleat-type lampholders located at least 2.5 m (8 ft) above the floor shall be permitted to have
exposed terminals.
410.6 Listing Required. All luminaires, lampholders, and retrofit kits shall be listed.
410.8 Inspection. Luminaires shall be installed such that the connections between the luminaire
conductors and the circuit conductors can be inspected without requiring the disconnection of any part of the wiring
unless the luminaires are connected by attachment plugs and receptacles.
II. Electrical Luminaire Locations in Phoenix Arizona
410.10 Luminaires in Specific Locations.
(A) Wet and Damp Locations. Luminaires installed in wet or damp locations
shall be installed such that water cannot enter or accumulate in wiring compartments, lampholders, or other
electrical parts. All luminaires installed in wet locations shall be marked, “Suitable for Wet Locations.” All
luminaires installed in damp locations shall be marked “Suitable for Wet Locations” or “Suitable for Damp
Locations.”
(B) Corrosive Locations. Luminaires installed in corrosive locations shall be
of a type suitable for such locations.
(C) In Ducts or Hoods. Luminaires shall be permitted to be installed in
commercial cooking hoods where all of the following conditions are met:
(1) The luminaire shall be identified for use within commercial cooking hoods and installed such that the
temperature limits of the materials used are not exceeded.
(2) The luminaire shall be constructed so that all exhaust vapors, grease, oil, or cooking vapors are
excluded from the lamp and wiring compartment. Diffusers shall be resistant to thermal shock.
(3) Parts of the luminaire exposed within the hood shall be corrosion resistant or protected against
corrosion, and the surface shall be smooth so as not to collect deposits and to facilitate cleaning.
(4) Wiring methods and materials supplying the luminaire(s) shall not be exposed within the cooking
hood.
Informational Note: See 110.11 for conductors and equipment exposed to deteriorating agents.
(D) Bathtub and Shower Areas. No parts of cord-connected luminaires,
chain-, cable-, or cord-suspended luminaires, lighting track, pendants, or ceiling-suspended (paddle) fans shall be
located within a zone measured 900 mm (3 ft) horizontally and 2.5 m (8 ft) vertically from the top of the bathtub
rim or shower stall threshold. This zone is all encompassing and includes the space directly over the tub or shower
stall. Luminaires located within the actual outside dimension of the bathtub or shower to a height of 2.5 m (8 ft)
vertically from the top of the bathtub rim or shower threshold shall be marked for damp locations, or marked for
wet locations where subject to shower spray.
(E) Luminaires in Indoor
Sports, Mixed-Use, and All-Purpose Facilities. Luminaires subject to physical damage, using a mercury vapor or
metal halide lamp, installed in playing and spectator seating areas of indoor sports, mixed-use, or all-purpose
facilities shall be of the type that protects the lamp with a glass or plastic lens. Such luminaires shall be
permitted to have an additional guard.
(F) Luminaires Installed in or Under Roof
Decking. Luminaires installed in exposed or concealed locations under metal-corrugated sheet roof decking shall be
installed and supported so there is not less than 38 mm (1 ½ in.) measured from the lowest surface of the roof decking to the top of the
luminaire.
410.11 Luminaires Near Combustible Material.Luminaires shall be constructed, installed, or
equipped with shades or guards so that combustible material is not subjected to temperatures in excess of 90°C
(194°F).
410.12 Luminaires over Combustible Material.Lampholders installed over highly combustible material
shall be of the unswitched type. Unless an individual switch is provided for each luminaire, lampholders shall be
located at least 2.5 m (8 ft) above the floor or shall be located or guarded so that the lamps cannot be readily
removed or damaged.
410.14 Luminaires in Show Windows. Chain-supported luminaires used in a show window shall be
permitted to be externally wired. No other externally wired luminaires shall be used.
410.16 Luminaires in Clothes Closets.
(A) Luminaire Types Permitted. Only luminaires of the following
types shall be permitted in a closet:
(1) Surface-mounted or recessed incandescent or LED luminaires with completely enclosed light
sources
(2) Surface-mounted or recessed fluorescent luminaires
(3) Surface-mounted fluorescent or LED luminaires identified as suitable for installation within the
closet storage space
(B) Luminaire Types Not Permitted. Incandescent luminaires with
open or partially enclosed lamps and pendant luminaires or lampholders shall not be permitted.
(C) Location. The minimum clearance between luminaires installed in clothes closets
and the nearest point of a closet storage space shall be as follows:
(1) 300 mm (12 in.) for surface-mounted incandescent or LED luminaires with a completely enclosed
light source installed on the wall above the door or on the ceiling.
(2) 150 mm (6 in.) for surface-mounted fluorescent luminaires installed on the wall above the door or
on the ceiling.
(3) 150 mm (6 in.) for recessed incandescent or LED luminaires with a completely enclosed light source
installed in the wall or the ceiling.
(4) 150 mm (6 in.) for recessed fluorescent luminaires installed in the wall or the ceiling.
(5) Surface-mounted fluorescent or LED luminaires shall be permitted to be installed within the closet
storage space where identified for this use.
410.18 Space for Cove Lighting. Coves shall have adequate space and shall be located so
that lamps and equipment can be properly installed and maintained.
III. Electrician in Phoenix
Provisions at Luminaire Outlet Boxes, Canopies, and Pans
410.20 Space for Conductors. Canopies and outlet boxes taken together shall provide
sufficient space so that luminaire conductors and their connecting devices are capable of being
installed in accordance with 314.16.
410.21 Temperature Limit of Conductors in Outlet Boxes. Luminaires shall be of such
construction or installed so that the conductors in outlet boxes shall not be subjected to temperatures
greater than that for which the conductors are rated.
Branch-circuit wiring, other than 2-wire or multiwire branch circuits supplying power to
luminaires connected together, shall not be passed through an outlet box that is an integral part of a
luminaire unless the luminaire is identified for through-wiring.
Informational Note: See 410.64(C) for wiring supplying power to luminaires connected together.
410.22 Outlet Boxes to Be Covered. In a completed installation, each outlet box shall
be provided with a cover unless covered by means of a luminaire canopy, lampholder, receptacle, or
similar device.
410.23 Covering of Combustible Material at Outlet Boxes. Any combustible wall or
ceiling finish exposed between the edge of a luminaire canopy or pan and an outlet box having a surface
area of 1160 mm 2 (180 in. 2) or more shall be covered with noncombustible material.
410.24 Connection of Electric-Discharge and LED Luminaires.
(A) Independent of the Outlet
Box. Electric-discharge and LED luminaires supported independently of the outlet box shall be
connected to the branch circuit through metal raceway, nonmetallic raceway, Type MC cable, Type AC
cable, Type MI cable, nonmetallic sheathed cable, or by flexible cord as permitted in 410.62(B) or 410.62(C).
(B) Access to Boxes. Electric-discharge and LED luminaires
surface mounted over concealed outlet, pull, or junction boxes and designed not to be supported
solely by the outlet box shall be provided with suitable openings in the back of the luminaire to
provide access to the wiring in the box.
IV. Electrician Luminaire Supports in Phoenix Arizona
410.30 Supports.
(A) General. Luminaires and lampholders shall be securely supported.
A luminaire that weighs more than 3 kg (6 lb) or exceeds 400 mm (16 in.) in any dimension shall
not be supported by the screw shell of a lampholder.
(B) Metal or Nonmetallic
Poles Supporting Luminaires. Metal or nonmetallic poles shall be permitted to be used to
support luminaires and as a raceway to enclose supply conductors, provided the following
conditions are met:
(1) A pole shall have a handhole not less than 50 mm × 100 mm (2 in. × 4 in.) with a
cover suitable for use in wet locations to provide access to the supply terminations within
the pole or pole base.
Exception No. 1: No handhole shall be required in a pole 2.5 m (8 ft) or less in
height abovegrade where the supply wiring method continues without splice or pull point,
and where the interior of the pole and any splices are accessible by removing the
luminaire.
Exception No. 2: No handhole shall be required in a pole 6.0 m (20 ft) or less in
height abovegrade that is provided with a hinged base.
(2) Where raceway risers or cable is not installed within the pole, a threaded fitting
or nipple shall be brazed, welded, or attached to the pole opposite the handhole for the
supply connection.
(3) A metal pole shall be provided with an equipment grounding terminal as follows:
a. A pole with a handhole shall have the equipment grounding terminal accessible
from the handhole.
b. A pole with a hinged base shall have the equipment grounding terminal
accessible within the base.
Exception to (3): No grounding terminal shall be required in a pole 2.5 m (8 ft)
or less in height abovegrade where the supply wiring method continues without splice or
pull, and where the interior of the pole and any splices are accessible by removing the
luminaire.
(4) A metal pole with a hinged base shall have the hinged base and pole bonded
together.
(6) Conductors in vertical poles used as raceway shall be supported as provided in 300.19.
410.36 Electrician Means of Support in Phoenix Arizona.
(B) Suspended Ceilings. Framing members of
suspended ceiling systems used to support luminaires shall be securely fastened to each
other and shall be securely attached to the building structure at appropriate
intervals. Luminaires shall be securely fastened to the ceiling framing member by
mechanical means such as bolts, screws, or rivets. Listed clips identified for use with
the type of ceiling framing member(s) and luminaire(s) shall also be permitted.
(C) Luminaire Studs. Luminaire studs that are not a
part of outlet boxes, hickeys, tripods, and crowfeet shall be made of steel, malleable
iron, or other material suitable for the application.
(D) Insulating Joints. Insulating joints that are
not designed to be mounted with screws or bolts shall have an exterior metal casing,
insulated from both screw connections.
(E) Raceway Fittings. Raceway fittings used to
support a luminaire(s) shall be capable of supporting the weight of the complete
fixture assembly and lamp(s).
(F) Busways. Luminaires shall be permitted to be connected to
busways in accordance with 368.17(C).
(G) Trees. Outdoor luminaires and associated equipment shall be
permitted to be supported by trees.
Informational Note No. 1: See 225.26 for restrictions for support of overhead conductors.
Informational Note No. 2: See 300.5(D) for protection of conductors.
V. Grounding
410.40 General. Luminaires and lighting equipment shall be
grounded as required in Article 250 and Part V of this article Per electrical code for Phoenix AZ.
410.42 Luminaire(s) with Exposed Conductive Parts. Exposed metal
parts shall be connected to an equipment grounding conductor or insulated from the
equipment grounding conductor and other conducting surfaces or be inaccessible to
unqualified personnel. Lamp tie wires, mounting screws, clips, and decorative bands
on glass spaced at least 38 mm (1 ½in.) from lamp terminals shall not be required to be
grounded.
410.44 Methods of Grounding. Luminaires and equipment shall be
mechanically connected to an equipment grounding conductor as specified in 250.118 and sized in accordance with 250.122.
Exception No. 1: Luminaires made of insulating material that is directly
wired or attached to outlets supplied by a wiring method that does not provide a
ready means for grounding attachment to an equipment grounding conductor shall be
made of insulating material and shall have no exposed conductive parts.
Exception No. 2: Replacement luminaires shall be permitted to connect an
equipment grounding conductor from the outlet in compliance with 250.130(C). The luminaire shall then comply with 410.42.
Exception No. 3: Where no equipment grounding conductor exists at the outlet,
replacement luminaires that are GFCI protected shall not be required to be
connected to an equipment grounding conductor.
410.46 Equipment Grounding Conductor Attachment. Luminaires with
exposed metal parts shall be provided with a means for connecting an equipment
grounding conductor for such luminaires.
VI. Wiring of Luminaires per electrical
code for electricians in Phoenix
410.48 Electrical Luminaire Wiring — General. Wiring on or
within luminaires shall be neatly arranged and shall not be exposed to physical
damage. Excess wiring shall be avoided. Conductors shall be arranged so that
they are not subjected to temperatures above those for which they are
rated.
410.50 Electrical Polarization of Luminaires. Luminaires shall
be wired so that the screw shells of lampholders are connected to the same
luminaire or circuit conductor or terminal. The grounded conductor, where
connected to a screw shell lampholder, shall be connected to the screw
shell.
410.52 Conductor Insulation. Luminaires shall be wired with
conductors having insulation suitable for the environmental conditions,
current, voltage, and temperature to which the conductors will be
subjected.
Informational Note: For ampacity of fixture wire, maximum operating
temperature, voltage limitations, minimum wire size, and other
information, see Article 402.
410.54 Electrical Pendant Conductors for Incandescent
Filament Lamps.
(A) Support. Pendant lampholders with
permanently attached leads, where used for other than festoon wiring,
shall be hung from separate stranded rubber-covered conductors that are
soldered directly to the circuit conductors but supported independently
thereof.
(B) Size. Unless part of listed decorative
lighting assemblies, pendant conductors shall not be smaller than 14 AWG
for mogul-base or medium-base screw shell lampholders or smaller than 18
AWG for intermediate or candelabra-base lampholders.
(C) Twisted or Cabled. Pendant
conductors longer than 900 mm (3 ft) shall be twisted together where not
cabled in a listed assembly.
410.56 Protection of Conductors and Insulation. Per electrical code
for an electrician in the Phoenix area;
(A) Properly Secured. Conductors
shall be secured in a manner that does not tend to cut or abrade the
insulation.
(B) Protection Through
Metal. Conductor insulation shall be protected from abrasion where it
passes through metal.
(C) Luminaire Stems. Splices and
taps shall not be located within luminaire arms or stems.
(D) Splices and Taps. No
unnecessary splices or taps shall be made within or on a luminaire.
Informational Note: For approved means of making connections,
see 110.14.
(E) Stranding. Stranded conductors shall
be used for wiring on luminaire chains and on other movable or
flexible parts.
(F) Tension. Conductors shall be arranged
so that the weight of the luminaire or movable parts does not put
tension on the conductors.
410.59 Cord-Connected
Showcases. Individual showcases, other than fixed, shall be permitted to be
connected by flexible cord to permanently installed receptacles, and groups
of not more than six such showcases shall be permitted to be coupled together
by flexible cord and separable locking-type connectors with one of the group
connected by flexible cord to a permanently installed receptacle.
(A) Cord Requirements. Flexible cord
shall be of the hard-service type, having conductors not smaller than the
branch-circuit conductors, having ampacity at least equal to the
branch-circuit overcurrent device, and having an equipment grounding
conductor.
Informational Note: See Table 250.122 for size of equipment grounding conductor.
(B) Receptacles, Connectors, and Attachment Plugs. Receptacles, connectors,
and attachment plugs shall be of a listed grounding type rated 15 or 20
amperes.
(C) Support. Flexible cords shall be secured to the
undersides of showcases such that all of the following conditions are
ensured:
(1) The wiring is not exposed to physical damage.
(2) The separation between cases is not in excess of 50 mm (2
in.), or more than 300 mm (12 in.) between the first case and the
supply receptacle.
(3) The free lead at the end of a group of showcases has a female
fitting not extending beyond the case.
(D) No Other Equipment. Equipment other
than showcases shall not be electrically connected to showcases.
(E) Secondary Circuit(s). Where
showcases are cord-connected, the secondary circuit(s) of each
electric-discharge lighting ballast shall be limited to one showcase.
410.62 Cord-Connected Lampholders and Luminaires.
(A) Lampholders. Where a metal lampholder
is attached to a flexible cord, the inlet shall be equipped with an
insulating bushing that, if threaded, is not smaller than metric
designator 12 (trade size 3/ 8) pipe size. The cord hole shall be of a size
appropriate for the cord, and all burrs and fins shall be removed in
order to provide a smooth bearing surface for the cord.
Bushing having holes 7 mm ( 9/ 32 in.) in diameter shall be permitted for use with
plain pendant cord and holes 11 mm ( 13/ 32 in.) in diameter with reinforced cord.
(B) Adjustable
Luminaires. Luminaires that require adjusting or aiming after
installation shall not be required to be equipped with an attachment plug
or cord connector, provided the exposed cord is of the hard-usage or
extra-hard-usage type and is not longer than that required for maximum
adjustment. The cord shall not be subject to strain or physical
damage.
(C) Electric-Discharge and LED Luminaires.
(1) Cord-Connected
Installation. A luminaire or a listed assembly shall be permitted to be
cord connected if the following conditions apply:
(1) The luminaire is located directly below the outlet or
busway.
(2) The flexible cord meets all the following:
a. Is visible for its entire length outside the
luminaire
b. Is not subject to strain or physical damage
c. Is terminated in a grounding-type attachment plug cap
or busway plug, or is a part of a listed assembly incorporating
a manufactured wiring system connector in accordance with 604.6(C), or has a luminaire assembly with a strain
relief and canopy having a maximum 152 mm (6 in.) long section
of raceway for attachment to an outlet box above a suspended
ceiling
(2) Provided with Mogul-Base, Screw Shell Lampholders. Electric-discharge
luminaires provided with mogul-base, screw shell lampholders shall be
permitted to be connected to branch circuits of 50 amperes or less by
cords complying with 240.5. Receptacles and attachment plugs shall be permitted to be
of a lower ampere rating than the branch circuit but not less than 125
percent of the luminaire full-load current.
(3) Equipped with
Flanged Surface Inlet. Electric-discharge luminaires equipped with a
flanged surface inlet shall be permitted to be supplied by cord pendants
equipped with cord connectors. Inlets and connectors shall be permitted
to be of a lower ampere rating than the branch circuit but not less than
125 percent of the luminaire load current.
410.64 Luminaires as
Raceways. Luminaires shall not be used as a raceway for circuit
conductors unless they comply with 410.64(A), (B), or (C).
(A) Listed. Luminaires listed and marked for
use as a raceway shall be permitted to be used as a raceway.
(B) Through-Wiring. Luminaires
identified for through-wiring, as permitted by 410.21, shall be permitted to be used as a raceway.
(C) Luminaires
Connected Together. Luminaires designed for end-to-end connection to
form a continuous assembly, or luminaires connected together by
recognized wiring methods, shall be permitted to contain the
conductors of a 2-wire branch circuit, or one multiwire branch
circuit, supplying the connected luminaires and shall not be required
to be listed as a raceway. One additional 2-wire branch circuit
separately supplying one or more of the connected luminaires shall
also be permitted.
Informational Note: See Article 100 for the definition of Multiwire Branch Circuit.
410.68 Feeder and Branch-Circuit Conductors and Ballasts. Feeder
and branch-circuit conductors within 75 mm (3 in.) of a ballast, LED
driver, power supply, or transformer shall have an insulation
temperature rating not lower than 90°C (194°F), unless supplying a
luminaire marked as suitable for a different insulation
temperature.