CAN/CSA E79-18-95(R2009)

1. ScopeThis part of IEC 79 prescribes the specific requirements for construction and testing of electrical apparatus, parts of electrical apparatus and Ex components which have rated voltages not exceeding 11 kV with the type of protection encapsulation ''m''.These specific requirements supplement IEC 79-0 ''General Requirements'' with the following exceptions.Clauses of IEC 79-0 which are not applicable:4.2 Maximum surface temperature (for Ex components); 5.2 Time delay before opening an enclosure; 6.2 Threaded holes in enclosures of plastic material; 8 Fasteners; 9 Interlocking devices; 15 Cable and conduit entries; 17 Switchgear; 18 Fuses; 20.2 Warning label for luminaires; 22.4.3.1 Test for resistance to impact (for Ex components); 22.4.4 Test for degree of protection for enclosures; 22.4.8 Test in explosive mixtures; 22.4.9 Test of clamping of non-armoured cables in cable entries; 22.4.10 Test of clamping of armoured cables in cable entries.