50 AMP WIRE SIZE 220 VOLTS THHN CONDUIT INSTALL

6 AWG stranded copper wire has a resistance of 0.491 ohms per 1000 ft. In your case, 8 AWG stranded copper wire has a resistance of 0.778 ohms per 1000 ft. The first step here will be to use Table 8 from chapter 9 of the NEC, to determine the resistance of the conductors you've selected. Once you have the base conductor size selected, you'll want to calculate the voltage drop across that size conductors for the length of the feeders. If you want a 60 ampere panel, you'll need 6 AWG copper conductors.

50 AMP WIRE SIZE 220 VOLTS THHN CONDUIT INSTALL

So in your case, if you want to install a 50 ampere panel, you'll need at least 8 AWG copper conductors. For your situation, we'll assume we can use the 75☌ column, that you want to use copper conductors, and there's no other corrections required. Start out by using Table 310.15(B)(16), and applying any required corrections, to determine what size conductors you'll need. Also, if you answer can you please give a reference to the part of the NEC that you are referencing? I plan to have an electrician do most the work so for now I just need to know what size conduit to drop in the ground. I'm know the length of the run will impact wire gauge and that in turn will dictate the conduit size due to fill constraints. It is another 60 feet underground through the yard, and 10 feet inside the garage to the sub-panel. It is 60 feet from main panel through crawl space. The run will start at the main panel at front of house, dip into the crawl space, run to the back of the house, dip underground and travel to the garage, then run to the sub-panel in the garage. The run will be 1 phase 240V and go from a 100amp main panel and travel 130 feet to a 50amp sub-panel. Right now I am trenching the underground portion of the run and need to know what size PVC 80 conduit to install in the trench. The plan is to remove the overhead wires and install a new sub-panel in the garage with an underground (PVC 80) run between the house and garage. I have old overhead wires that go between my home and a detached garage.

50 amp wire size 220 volts thhn conduit