Log in

View Full Version : What type aluminum wire would I use to run 400 feet direct burial for 100amp sun pnl


nomaples
Sep 30, 2014, 10:10 AM
Wire size for additional sub-panel;
What type/size aluminum wire would I use to run 400 ft to add a 100amp sub-panel in pvc underground?
Thanks

donf
Sep 30, 2014, 11:47 AM
If your goal is to deliver 100 amps to a terminal point 400 feet away, then you will need to use 300 kcmil conductors.

You might want to reconsider the load (amperage) needed at the destination. 400' is a massive distance. Is there no way the power company can put a transformer closer than that or have you considered using solar power?

stanfortyman
Sep 30, 2014, 12:53 PM
For 80A load I come up with 4/0AL.
For the full 100A (which is almost certainly not necessary) I come up with 250mcm.