Hi, I'm having a new detached garage built and am doing the electrical work myself in order to save money, I have some backround in industrial electrical wiring so I really don't see a problem other than with codes. My question is a 2 part question, I have room in a sub panel in my basement to pull 4 - 20 amp circuits to the new garage. My question is, How many #12 wires does code allow me to pull in a 3/4" conduit? And does the conduit i'm using to get from the basement to the new garage have to be Ridgid? Can I use 1 common for 2 circuits or do I need a seperate common for each? I would appreciate any help you can give me.
Thank's in advance, dkrock

 

You can only run one circuit to your new garage.

Your circuit can be for a subpanel, or you can run one 220 or 110 circuit. You can run a 110 multiwire circuit, which effectively gives you two 110 circuits.

I suspect that you will want to run a 220 circuit for a sub-panel in your new garage.

First, start by listing your needs for electricity on your new garage. Then determine how much power you need to supply. This will lead you to a sizxe for the subpanel to be installed.

 

Bob's response is right on. You're going to need a subpanel in your garage (grounding rods too). If practical, it would be better to run the feeder to your garage from the main panel rather than from the subpanel.

 

10-4, Thank you both, I will collect some more info, I'm obviously going to give it a little more thought!