BS : 4752 : part 1 : 1977 : specification for switchgear and controlgear for voltages up to and including 1000 V a.c. & 1200 V d.c. - Part 1 : circuit breakers
- London BSI 1977
STD1856
BS 4752 : Part 1 : 1977
621.316.3/.5 + 621.316.57.027.2
STD1856
BS 4752 : Part 1 : 1977
621.316.3/.5 + 621.316.57.027.2