Hobart, H. M. (Henry Metcalf), 1868-1946 ed · Philadelphia, J. B. Lippincott · leaf 329
Wall Socket and Plug insulating head to which the pins are at-tached. Thus when the plug is inserted inthe socket, connection is made, but no liveconducting surface is left exposed.Wallis - Jones Automatic Earth - leakag^e Cut-out, an instrument which soprotects a cc circuit that the circuit is… … •S ^O, JJ-B CgW
Electrical engineering
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