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IEC 60364-4-43:1977 ED1

Electrical installations of buildings. Part 4: Protection for safety. Chapter 43: Protection against overcurrent

Publication date:   Jan 1, 1977

General information

99.60 Withdrawal effective   Aug 20, 2001

IEC

TC 64

International Standard

91.140.50   Electricity supply systems | 29.120.50   Fuses and other overcurrent protection devices

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  Revised

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Scope

Sets out general rules for protection of live conductors against overload and short circuit.
Specifies the features of various protective devices and necessary coordination between conductors and overload protective devices. Formula for calculation of time in which a given short-circuit current will raise a conductor from the highest admissible temperature in normal duty to its limit temperature. Enumerates requirements for coordination of overload and short-circuit protection.

Note: For details of
-low-voltage circuit breakers, see IEC 60947-2
-low-voltage fuses, see IEC 60269
-for coordination of low-voltage direct-online (full voltage) motor starters with short-circuit protective devices, see IEC 60947-1
-for current-carrying capacities of conductors for electrical installations of buildings, see IEC 60364-5-523.

Life cycle

NOW

WITHDRAWN
IEC 60364-4-43:1977 ED1
99.60 Withdrawal effective
Aug 20, 2001

CORRIGENDA / AMENDMENTS

WITHDRAWN
IEC 60364-4-43:1977/AMD1:1997 ED1

REVISED BY

WITHDRAWN
IEC 60364-4-43:2001 ED2