Voltage operated earth leakage circuit breakers for use on consumers premises.
NORMA vydána dne 8.3.1957
Designation standards: BS 842:1939
Note: NEPLATNÁ
Publication date standards: 8.3.1957
The number of pages: 20
Approximate weight : 60 g (0.13 lbs)
Country: British technical standard
Kategorie: Technické normy BS