BS 7657:1993 Specification for fuses (cut-outs), ancillary terminal blocks and interconnecting units up to 100 A rating, for power supplies to buildings
Specifies the requirements and tests for equipment up to 100 A rating on single phase, or one phase of a three phase low-voltage public electricity supply system up to 440 V a.c at 50 Hz with the neutral effectively earthed. To be read in conjunction with BS EN 60947-1