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for the temperature encountered shall be permitted

to run from the luminaire (fixture) terminal connection

to an outlet box placed at least 300 mm (1 ft.) from

the fixture. 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 504

504.20 Wiring Methods. Intrinsically safe apparatus and

wiring shall be permitted to be installed using any of the

wiring methods suitable for unclassified locations, including

Chapter 7 and Chapter 8. Sealing shall be as provided in

Section 504.70, and separation shall be as provided in

Section 504.30.

Article 505

505.15 Wiring Methods.

Wiring methods shall maintain

the integrity of protection techniques and shall comply with

505.15(A), (B), or (C).

(A) Class I, Zone 0. In Class I, Zone 0 locations, only

intrinsically safe wiring methods in accordance with

Article 504 shall be permitted

FPN: Article 504 only includes protection technique “ia.”

Article 551 – Recreational Vehicles and

Recreational Vehicle Parks

551.47 Wiring Methods.

(G) Protected. Metal-clad, Type AC, or nonmetallic-

sheathed cables and electrical nonmetallic tubing

shall be permitted to pass through the centers of the

wide side of 2  4 wood studs. However, they shall

be protected where they pass through 2  2 wood

studs or at other wood studs or frames where the

cable or tubing would be less than 32 mm (1

⁄4 in.)

from the inside or outside surface. Steel plates on

each side of the cable or tubing, or a steel tube, with

not less than 1.35 mm (0.053 in.) wall thickness, shall

be installed to protect the cable or tubing. These

plates or tubes shall be securely held in place. Where

nonmetallic-sheathed cables pass through punched,

cut, or drilled slots or holes in metal members, the

cable shall be protected by bushings or grommets

securely fastened in the opening prior to installation

of the cable.