I have begun construction of my new shop. It will be a stand alone 2400 sq ft shop with 3 phase power, lots of recepticles, lots of lights, surface mounted conduit, etc. This will be a big electrical job (plan calls for two 225 amp control panels - one for 3 phase and one for single phase) so I am getting bids from local contractors but I don't have a feel for what to expect. I have heard $3.50 / sq ft for normal house wiring but this is quite a bit more than that. Any thoughts?