ELECTRICAL INSTALLATIONS OF BUILDINGS - PART 4-43: PROTECTION FOR SAFETY - PROTECTION AGAINST OVER CURRENT (IEC 60364-4-43:2001, IDT)
This Malaysian Standard describes how live conductors are protected by one or more devices for automatic interruption of the supply in the event of overload and short-circuits except in cases where the over current is limited in accordance with clause 436 or by the conditions described in 433.3, 433.5 or 434.3 are met.
Further, protection against overload and against short-circuits shall be co-ordinated in accordance with clause 435.
NOTE 1 Live conductors protected against overload in accordance with clause 433 are considered to be protected also against faults likely to cause overcurrents of a magnitude similar to overload currents.
NOTE 2 The requirements of this standard do not take account of external influences. For the application of protective measures in relation to conditions of external influences, see 410.3.4 of IEC 60364-4-41 and clause 422 of IEC 60364-4-42.
NOTE 3 Protection of conductors according to this standard does not necessarily protect the equipment connec
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10/05/2019
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NSC 05 - Generation, Transmission & Distribution of Energy
