LED lu- minaires with a completely enclosed light source in- stalled in the wall or the ceiling

(4) ISO mm (6 in.) for recessed fluorescent luminaires in- stalled in the wall or the ceiling

(5) Surface-mounted fluorescent or LED luminaires shall be permitted to be installed within the storage space where identified for this use.

410.18 Space for Cove Lighting. Coves shall have ad- equate space and shall be located so that lamps and equipment can be properly installed and maintained.

III. Provisions at Luminaire Outlet Boxes, Canopies, and Pans

410.20 Space for Conductors. Canopies and outlet boxes taken together shall provide adequate space so that lumi- naire conductors and their connecting devices can be properly installed.

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.
FPN: See 410.65 for wiring supplying power to fixtures connected together.

410.22 Outlet Boxes to Be Covered. In a completed in- stallation, each outlet box shall be provided with a cover unless covered by means of a luminaire canopy, lamp-holder, 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 shall be covered with noncombustible material.

410.24 Connection of Electric-Discharge Luminaire.

(A) Independent of the Outlet Box. Electric-discharge 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 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. Luminaire Supports

410.30 Supports.

(A) General. Luminaires and lampholders shall be se- curely 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 x 100 mm (2 in. x 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