Luminaires shall be wired with conductors having insulation suitable for the _____ to which the conductors will be subjected.
I. environmental conditions II. current-voltage III. temperature.
The Illuminating Engineers Society (IES) makes use of luminaire. Fixture is employed by the US Congress. And it's typical to hear someone refer to a source of light as a lamp. Although both names are technically correct, the correct term is luminiire.
A luminaire is described as "a complete lighting unit consisting of a lamp or lamps together with the parts designed to distribute the light, to position and protect the lamps, and to connect the lamps to the power supply" in both the IES Lighting Handbook and the 2014 National Electrical Code, Article 100 (which originally the 2004 NEC).
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