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I got 100 amp service in the house and and putting my old box in the garage and wondering what size of wire will work I have 3c 6awg wired there already and wondering what size of main breaker i need in the garage i was told 60 amp is the biggers i can go . What will work for me.
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Wire types TW has a thermoplastic insulation without the nylon coating and is rated at 55 amps. Type TW changes its characteristics to THHN/THWN by the nylon coating and raises its amp rating to 65 amps. you may be able to get a main lug kit for your remote panelbox and eliminate the use of a second circuit breaker. In all due respects, when any remote panelbox becomes a sub-panel it should be fed with a four wire, not a three wire. check with your local inspector to see if he'll allow you to use your old panel in your garage with the addition of a driven ground rod and the addition of an auxillary grounding bar inside.
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