This article was posted 06/29/2007 and is most likely outdated.

Article 410 Luminaires (Lighting Fixtures), Lampholders, and Lamps - 410.73
 

 
Subject - Article 410 Luminaires (Lighting Fixtures), Lampholders, and Lamps - 410.73
Based on - NEC - 2005 Edition

June 29, 2007
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Luminaires (Lighting Fixtures), Lampholders, and Lamps

410.73 General

Part XIII. Electric-Discharge Lighting (1,000V or Less)

New rule specifies when luminaires with metal halide lamp are to be provided with a method to help contain the arc at end-of-life arc-tube failures.

(F) High-Intensity Discharge Luminaires.
(5) Metal Halide Lamp Containment. Luminaires containing metal halide lamp, other than a thick-glass parabolic reflector lamp (PAR), must be provided with a containment barrier that encloses the lamp or the luminaire must only allow the use of a Type “O” lamp. Figure 410-7

Author’s Comment: Fires have resulted from the spillage of hot arc tube particles from metal halide lamp failures. “O-rated” lamps have been designed to meet ANSI containment test for the installation of the metal halide lamp in an open fixture.



Figure 410-7
(Click on image to enlarge)

       
 
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Comments

  • All non-enclosed Metal Halide lumineres must have a "Pink" socket to distiguish the socket using the proper lamp.

    John Turilli
    Reply to this comment

  • is there a code that will let you put a white wire on a breaker

    dale l dascher
    Reply to this comment

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