Posted by JDseller on February 06, 2012 at 20:23:10 from (208.126.196.144):
I have always ran three insulated wires with a bare ground anytime I am wiring anything 220 volts.
I have electric heaters in the upstairs on my home now and have installed them in several of the rental houses we have.
I always use double pole thermostats and run 12/3 wiring. That wire has three insulated wires and the bare copper ground. The heaters I have installed all had provisions to hook the wires up using the 12/3, meaning: two hots, service return and the bare earth ground.
I alway thought that it was not the safest to just use 12/2 wiring when running 220 circuits. IS the bare ground wire not carrying the service ground current back to the panel????
I will admit to over sizing things when it comes to electric wiring. If it is close at 14g wire then 12g is all the better. At least that was my thinking on the subject.
I have had wiring jobs I have done inspected and non of the inspectors ever complained about me using heavier wiring or additional grounding.
Have I been wrong in thinking that heavier wire and additional grounding is safer????
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