How many watts can 110 wire carry?

Answer 1

The first thing we have to do is clarify between the two items. 120 volt wire rating is an insulation rating of the wire. Like wire with ratings of 300 volts, 600 volts and 1000 volts these are the highest allowable voltages that can be applied. A wire that is rated for 300 volts is good for 120 volts, 240 volts and 277 volts. At test research facilities, equipment is tested to destruction. The label that is given to wire as a result of the tests is the highest safest voltages that can be applied to that particular wire. So when you see a wire that has a label stating that it is rated for 300 volts it means that any voltage under and up to 300 volts is safe to apply. The ability of a wire to carry current (amps) is related to the size of the wire.

Now, watts is the product of amps x volts. To answer this question, assuming the supply voltage is 110 volts, an amperage needs to be stated as per the formula above.