05-04-2015, 11:29 AM
I don't know how British wire gauges go, but there are accepted standards for how much current can be carried in a certain cross-sectional area, depending on temperature rise (modern wire enamels can stand more than old materials). Here it is measured in Amperes per circular mil (in reality you just look it up in the wire tables).
Older practice for insulation was to wind in layers with paper between to keep the layers straight. The finished winding was impregnated with wax or varnish to keep the wire immobile. Nowadays transformers are wound on bobbins with no paper.
Older practice for insulation was to wind in layers with paper between to keep the layers straight. The finished winding was impregnated with wax or varnish to keep the wire immobile. Nowadays transformers are wound on bobbins with no paper.
