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Hey /diy/ quick question.
I'm running new conduit from my fuse box, across my garage and out into my Addition's crawlspace, where said new conduit is going to meet up with existing wiring at a junction box in the crawl space. From there, it'll go underground to my detached garage.
In the junction box, and underground, there's already one circuit in place going out into the garage.
I've been told that I only need one Ground wire for multiple circuits. There's already a Ground wire in the garage, obviously since there's an existing circuit.
My question is, how many wires will I be pushing through the new conduit? Two(hot, neutral) or three(hot, neutral, ground)??
BEFORE YOU START TYPING OUT THAT REPLY ABOUT ME GETTING AN ELECTRICIAN TO DO THIS SHIT FOR ME BECAUSE I'M GOING TO FUCKING ELECTROCUTE MYSELF TO DEATH:
My Uncle, a guy who actually DOES know what he's doing, is doing all the important connections. I'm just running wire for him. I texted him this same question but sometimes it takes a while for him to answer, and I'm going out to pick this shit up tomorrow morning.
OH, and one more thing: Uncle told me to get #12 THHN wire. I checked the local Home Depot the other day, and the wire they sell on spools are both that kind, but some are 12 stranded, while others are 12 solid, what's the difference?