I’m working on upgrading my shed in the backyard and I have some questions about the electrical wiring in the building.
The current state of the wiring in there is just sad. I have a main wire coming into the shed, going into a junction box and getting connected to another wire, then that wire goes basically to all the plug points and is all controlled by one switch.
Technical spec questions:
The wire is going underground for about 50 feet. I bought a wire cutter with the little holes to measure the gauge of the wire. The stripped copper goes into the 12 gauge hole almost perfectly.
Can I safely assume that the main wire going into the shed is 12 gauge then? Am I measuring the gauge of the wire properly? If this is the case, for a 50 feet run, how much amperage does a 12 gauge wire bring to the shed?
The charts I found online doesn’t even show this combination. I’m assuming this is not a wise setup but I bought this house at its current state and there isn’t much I can do about it.
The question I’m trying to answer is this: I want to put up a breaker box in the shed. A sub panel. I want the main wire to go into the breaker box and I want the breaker box to hook up 4 plug points and 2 switches. What breaker box/sub panel do I need to buy, given the input wire is like in the photo above?
Any guidance will be highly appreciated! I’m very lost.
Junction(?) box: I might be using the wrong term here, but I think this is called a junction box?
Cable going into the shed: there is a small piece of conduit coming out of the ground and the sleeve on the cable has no writing whatsoever.
Breaker box from the house: the switch numbered 20 is the one going to the shed. I imagine you would’ve liked the pic without the top cover in the box but I’m not sure of what I’m doing, so I am kinda hesitant and scared to take the cover off
Close up of junction box:
Full breaker panel:
Instructions on the door: