i have 4 wires going to a ac unit #10 wires 2 wires for each cir. and i need to know how many amps can I run with 2 #10 copper for one side of the breaker
10 gauge wire is rated for 30 amps unless its a long run. I'm not sure I'm picturing the right setup you're proposing in your description but if you're talking about having two 'hot' wires and two 'neutral wires' clamped together at both ends its a bad idea. It would make sense that you could run 60 amps through the wire if it was doubled up like that but because of [science] it doesn't work like that. Not to mention any electrician or inspector would be drawing exclamation points on their notepad if they saw a setup like that. If you need to run more than 30 amps just buy lower gauge wire.
10 wire is rated for a maximum of 30 amps. This size wire can not be run in parallel to carry more current. I suggest that you have a local qualified professional electrician do the work since you seem unsure about what you are asking.
