BS EN 60439-3:1991+A2:2001 Low-voltage switchgear and controlgear assemblies. Particular requirements for low-voltage switchgear and controlgear assemblies intended to be installed in places where unskilled persons have access to their use. Distribution boards
BS EN 60439-3 gives supplementary requirements for enclosed distribution boards (DBU) which are stationary, type tested assemblies (TTA) for indoor use, containing protective devices and intended for use either in domestic (household) applications or in other places where unskilled persons have access for their use.
Control and/or signalling devices may also be included. They are for use on a.c., with a nominal voltage to earth not exceeding 300 V. The outgoing circuits contain short-circuit protective devices, each having a rated current not exceeding 125 A with a total incoming load current not exceeding 250 A.
Contents of BS EN 60439-3:
Foreword 2
1 General 4
2 Definitions 4
3 Classification of assemblies 5
4 Electrical characteristics of assemblies 5
5 Information to be given regarding the assembly 6
6 Service conditions 6
7 Design and construction 6
8 Test specifications 9
Annex ZA (informative) A-deviations 16
