I want to run a simple 120V line on my farm from the garage to a shed. All its for is a few lights and one outlet in case I want to run a power tool. So, it's nothing much. Just a simple 2 wire 20A run. I need to go about 80 feet. There was an old pole building that I tore down in between the garage and shed, but I left one of the tall poles, since I was planning to run this wire. That pole is about dead center, so there will be about 40 ft. one each side of the post. All I really need is a piece of 12gauge romex, but I know that wont hold up outdoors. I can NOT go underground, because there is an old concrete slab there. So, I must go overhead. What is the smallest gauge triplex they sell? (I dont think they make a 2 wire cable, so I may as well use the 3rd wire for a ground), since there will be no breaker in the shed, just a 20A breaker in the garage. I must also mention that I want to keep costs down, and have considered running 2 separate wires like they did in the old days, but I am not sure what type of wire is made for outdoor use. What other options are there? I am NOT worried about code, because around here no one really bothers with code. However, I do want it safe, and for the last few years I have had a few extension cords strung across, and am not too happy with that, especially when it gets unplugged up on the pole from winds, and I know that is not safe.
My other option is to buy some heavier USED triplex from a local guy that demolishes buildings, and re-sells a lot of stuff. He always has that sort of thing around. The last time I was there he had some that was thinner than most of the stuff I am familiar with, but still much thicker than a #12 wire. There was no markings on it, so I am going to guess it to be a 4 gauge (wires are about 1/4" thick WITH insulation. Is there any way to measure the wire to determine the gauge? The reason I need to know, is because he sells this stuff at half the price of new, and I want to be sure he is using the right gauge for the price, because this guy is not the most honest.
The other thing, I know that underground cable (UF) is not made for overhead, but I believe it is sunlight resistant, That makes me wonder if that is all I really need to string across?
Thanks in advance for all help.
Jerry