Article 348.20 Size.

(A) Minimum. FMC less than metric designator 16 (trade size ½) shall not be used unless permitted in 348.20 (A) (1) through (A) (5) for the metric designator 12 (trade size ⅜).

(2) In lengths not in excess of 1.8 m (6 ft) for any of the following uses:

a. For utilization equipment

b. As part of a listed assembly

c. For tap connections to luminaires (lighting fixtures) as permitted in 410.77 (C)

Article 348.22 Number of Conductors. The number of conductors shall not exceed that permitted by the percentage fill specified in Table 1, Chapter 9, or as permitted in Table 348.22 for the metric designator 12 (trade size ⅜).

Cables shall be permitted to be installed where such use is not prohibited by respective cable articles. The number of cables shall not exceed the allowable percentage fill specified in Table 1, Chapter 9.

Article 410.117 Wiring.

(A) General. Conductors that have insulation suitable for the temperature encountered shall be used.

(B) Circuit Conductors. Branch-circuit conductors that have an insulation suitable for the temperature encountered shall be permitted to terminate in the luminaire.

(C) Tap Conductors. Tap conductors of a type suitable for the temperature encountered shall be permitted to run from the luminaire terminal connection to an outlet box placed at least 300 mm (1 ft) from the luminaire. Such tap conductors shall be in suitable raceway or Type AC or MC cable of at least 450 mm (18 in.) but not more than 1.8 m (6 ft) in length.

Article 410.137 Equipment Not Integral with Luminaire.

(C) Wired Luminaire Sections. Wired luminaire sections are paired, with a ballast(s) supplying a lamp or lamps in both. For interconnection between paired units, it shall be permissible to use metric designator 12 (trade size ⅜) flexible metal conduit in lengths not exceeding 7.5 m (25 ft), in conformance with Article 348. Luminaire wire operating at line voltage, supplying only the ballast(s) of one of the paired luminaires, shall be permitted in the same raceway as the lamp supply wires of the paired luminaires.