111.105-7—Approved equipment.
When this subpart or NFPA NEC 2002 (incorporated by reference; see 46 CFR 110.10-1) states that an item of electrical equipment must be approved, or when IEC 60079-0 (incorporated by reference; see 46 CFR 110.10-1) states that an item of electrical equipment must be tested or approved in order to comply with the IEC 60079 series (as defined in § 111.105-1 and incorporated by reference; see 46 CFR 110.10-1 ), that item must be—
(a)
Listed or certified by an independent laboratory as approved for use in the hazardous locations in which it is installed; or
(b)
Purged and pressurized equipment that meets NFPA 496 (incorporated by reference; see 46 CFR 110.10-1) or IEC 60079-2.