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Question:

what kind of wire can I use?

Wire runs from breakers to a wall outlet along the garage wall

Answer:

Ok so the first two answers are almost correct. If the breaker is 20amp it's 12 gauge wire, if it's 15 amps it will be 14 gauge wire. The outlet is in a garage it must be a GFCI receptacle. That's a national electrical code requirement. If the wiring is to be exposed (ie not inside of a wall) then it must be in conduit, cheapest and easiest to install is pvc, you can run romex or NMB through conduit. If the wall is to be sheetrock when finished then you can run just romex through the studs. It is recommended that the GFCI receptacle be mounted in an extra deep box but is not required, makes it easier to get it in there with the wires. You can put up to 8 receptacles or devices, like light fixtures on one 20 amp circuit. More and you will be over loading the circuit. The romex you run should be for 20 amp 12-2 with ground. All circuits and devices must be grounded to be in compliance.
If you drill through the studs so that the cable does not lay on the face of the structure, studs, you can use NM (non-metallic) sometimes call romex. You should use 12 gage so use 12-2 cable which will have three wires including the ground. Connect to a new or otherwise unused 20 amp breaker and install as many outlets you want to this circuit.
you need ot use ordinary romex of a guage that will serve the power draw you intend it for and a breaker to match. i fyou already have breakers you intend to use, be sure to use the proper guage of romex so as to not have an electricsal fire. furhter, you usually have to enclose romes, it cannot be exposed along a wall if it comes from the breakerbox. you can get romex in conduit at home depot, etc.

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