Covers the constructional and marking requirements and test methods for electrical apparatus that is so constructed that, in normal operation and in the absence of electrical or mechanical failure, it is suitable (because of its construction, or because of its method of operation or because of its enclosure) for use in locations where mixtures of air and prescribed flammable vapours or gases occur under abnormal conditions only. Notes on the construction of enclosed-sparking switches are given in an appendix.
Số hiệu tiêu chuẩn
SABS 970:1971
Tên tiêu chuẩn
Ex N (non-sparking) electrical equipment for use in potentially flammable atmospheres (Class 1, Division 2 locations)
Ngày phát hành
1971-08-19
Tiêu chuẩn liên quan
IEC 60079-4 * IEC 60085 * IEC 60112 * IEC 60238 * SABS 0108 * SABS 1065 * SABS 1119 * SABS 1222 * SABS 172 * SABS 314 * SABS 890 * SABS 969
Từ khóa
CONSTRUCTION * ENCLOSURES * ENDURANCE TESTING * FLAMMABLE ATMOSPHERES * IMPACT TESTING * MARKING * PROTECTED ELECTRICAL EQUIPMENT * SPECIFICATIONS * SWITCHES * TEMPERATURE-RISE LIMIT * TYPE N PROTECTED ELECTRICAL EQUIPMENT * ZONE 2 HAZARDOUS AREAS * Impact testing * Switches * Temperature-rise limit * Zone 2 hazardous areas * Flammable atmospheres * Enclosures * Endurance testing * Protected electrical equipment * Circuit closers * Marking * Type n protected electrical equipment * Construction * Specifications
SABS 970:1971
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