On the other hand if you take say the wire running from the condenser motor, on a ac unit, to the contactor you have a heavy gauge wire with a somewhat thin insulation.
These types of wire yield about 66% copper and 33% waste. So at a 1.35 for insulated comes up to $2.20 worth of #2 copper, based on your figures.
This comes up to 61% profit from the same wire less your time and labor! One pound don't seem to be worth the effort but when the numbers go up so does the profit margin!
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