Luminaires, Lamp Holders

Luminaires and Lamp Holder Electrical Code in Phoenix

Arizona Electrical Solutions LLC (602) 396-5216
Arizona Electrical Solutions LLC(602) 396. 5216


The following article is about luminaries, lamp holders and the electrical codes pertaining to them in the Phoenix Arizona. Arizona Electrical Solutions,  Arizona Electrical Solutions LLC is your luminaires and lamp holder expert in the Phoenix area. If you want to reach us right away and want us to be your electrician in Phoenix, you can call or take a look at some of our pictures of our projects on yelp!  Yelp for Arizona Electrical Solutions LLC
If you are interested in lighting systems code and not just luminaires or lamp holders, we suggest checking out our Phoenix electrical code article about lighting systems.
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.
(5) Metal raceways or other equipment grounding conductors shall be bonded to the metal pole with an equipment grounding conductor recognized by  250.118 and sized in accordance with  250.122.
(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.
(A) Outlet Boxes. Outlet boxes or fittings installed as required by  314.23 and complying with the provisions of  314.27(A)(1) and  314.27(A)(2) shall be permitted to support luminaires.
(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.
The installation shall comply with  410.59(A) through (E).
(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.
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