Disconnecting Means for Fluorescent Luminaires

June 6, 2014
The special provisions for electric-discharge lighting systems of 1,000V or less are outlined in Art. 410, Part XII of the 2011 NEC.

In indoor locations other than dwellings and associated accessory structures, fluorescent luminaires that utilize double-ended lamps (typical fluorescent lamps) and contain ballasts that can be serviced in place must have a disconnecting means except for _____.

a) emergency illumination required in 700.16
b) cord-and-plug-connected luminaires with accessible plugs and receptacles
c) industrial establishments with restricted public access and written procedures and conditions of maintenance and supervision
d) all of the above

See answer and aplicable Code reference

The correct answer is: d) all of the above

The special provisions for electric-discharge lighting systems of 1,000V or less are outlined in Art. 410, Part XII of the 2011 NEC. As noted in Sec. 410.130(G)(1), "In indoor locations other than dwelling and associated accessory structures, fluorescent luminaires that utilize double-ended lamps and contain ballast(s) that can be serviced in place shall have a disconnecting means either internal or external to each luminaire. For existing installed luminaires without disconnecting means, at the time a ballast is replaced, a disconnecting means shall be intalled. The line side terminals of the disconnecting means shall be guarded."

But there are five Exceptions noted for this rule. Exceptions No. 2, 3 and 4 are outlined in answers a, b and c above.

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