§ 39.200. Hazardous locations.
(a) In locations where explosives, inflammable gas, or inflammable flyings normally exist in dangerous quantities all parts at which sparking or arcing is liable to occur shall be enclosed so as to reduce the hazard as far as practicable.
(b) This protection should be obtained by any one of the following methods:
(1) By placement in separate compartments or rooms, free from explosives, inflammable gas, and inflammable vapors.
(2) By using casings of the inclosed type, ventilated, if necessary, when dust or flyings are present.
(3) By using explosion-proof casings when inflammable gases exist in dangerous quantities.
(c) Casings shall be nonabsorptive and noncombustible, and when of metal shall be permanently grounded, if within reach of grounded surfaces, or if inflammable gas is present.
Cross References This section cited in 34 Pa. Code § 39.191 (relating to applicability); 34 Pa. Code § 39.192 (relating to scope); 34 Pa. Code § 39.193 (relating to modification or waiver of provisions); 34 Pa. Code § 39.232 (relating to hazardous locations); and 34 Pa. Code § 39.252 (relating to hazardous locations).
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