The "Ediswan" abridged catalogue of lighting accessories. (1919)
Edison Swan Electric Co. · Edison Swan Electric Co. · leaf 30
The two conductors are marked Avith different coloursunder the outer braiding, so that connections can betraced—a considerable advantage for keyholders and special work.
Electrical Equipment · Switchboards · Panelboards · Transfer switches · Fuses · Enclosed switches and circuit-breakers · Wiring devices
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