Grouped sub-circuit switches on different phases; combining mains and battery or other low-voltage outlets; iron and kettle connectors; fuses on three-phase motors; two-wire sub-circuits from three-phase 4-wire boards; interlocked switches; main switches; heavy-duty gear; mixed lighting and power loads, etc. See also Engineering Index 1931 p 436.
Wiring and fittings -- II
Elec Times
Electrical Times ; 80 , n 2093 ; p 879-881
1931
3 pages
Aufsatz (Zeitschrift)
Englisch
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