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CISDOC database

Document ID (ISN)31365
CIS number 79-647
Year 1978
Convention or series no.
Title Standard for safety - Portable electric light units for use in hazardous locations, Class I, Groups C and D, and Class II, Group G.
Bibliographic information ANSI/UL-1977, Underwriters' Laboratories, 207 East Ohio Street, Chicago, Illinois 60611, USA, 1 May 1978. Standard approved on 9 Nov. 1977. 16p. Illus. Price: US-$3.50.
Abstract This 4th edition of the standard, approved as American National Standard, updates previous editions. It lays down requirements for portable electric lighting units for indoor use in hazardous locations, in accordance with the U.S. National Electrical Code (CIS 78-31). Sections are devoted to: construction (protection of glass parts; joints in lamp enclosure; seal between lamp and terminal compartments; supply connections; external metal parts; grounding; switches, etc.); performance (temperature; thermal shock on glass parts; explosion and hydrostatic tests; grain dust penetration; stability, etc.); manufacturing and production tests; marking.
Descriptors (primary) hazardous locations; USA; explosion-proof electrical equipment; portable lighting; electric hand lamps
Descriptors (secondary) explosive atmospheres; electrical safety; safety by design; equipment testing; standard; marking
Document type F - Information notes, codes of practice, standards
Subject(s) Electricity
Broad subject area(s)
Browse category(ies) Lighting and colour
Explosions