I’m having trouble learning this. I have 3 branch circuits run in 3/4” PVC: 70’ of 12awg on a 120v 20amp breaker to 20amp outlet, 120’ of 10awg on a 120v 30amp breaker to the septic system lift station, and 130’ of 12awg on a 240v breaker run to the well head for the irrigation.

Because of the price break for 500’ spools I’m buying a spool of black, white, and green 10awg. I’m only running one ground, so 7 wires total with 6 being current carrying conductors. If I’m understanding the code correctly, this should be OK. Is it? THWN-2 is rated for 90 degrees C in wet locations as such 10awg’s ampacity is 40 amps and with 6 CCCs in the conduit the 40amps are derated 80% to 32amps and thus not an issue using 20 or 30amp breakers.

There’ll be a junction box where the outlet is. That’s where I’ll split the ground between the outlet, well head, and lift station. All the other wires will be pulled into that box from the panel and then pulled to their final destinations without being spliced.

The work needs to be done due to two saltwater flooding events in 2024 and incredibly shoddy repairs that were made then.

This message has been edited. Last edited by: trapper189,