More than on circuit to an outbuilding
I am in the process of installing a 60 amp sub panel in my attached garage to alleviate my overcrowded 200 amp main panel. I will be transfering my water heater, irrigation pump and garage circuits into the new panel.
As phase 2, I am replacing the wiring to my 2 outbuildings, a garage/workshop and the pump house for my potable water pump. The existing wiring to each building is a 20 amp, 120 volt circuit using 12-2 UF cable. It is buried about 3-6" deep and has stuck up out of the ground in spots (not good). My plan is to come off my new garage panel with 1.25" SCH40 PVC (I have a lot of it) to the garage/workshop (about 60 feet). I plan pulling 4 #`12 THWN to create a 20amp MWBC for that building.
I would also like to pull in 3 more #12 THWN to the garage, switch to 12-2 UF cable to the other side of the building and go buried to the pump house(about 15 feet). I would use this as a 240 volt circuit for the new pump I am installing. No 120 volt required at the pump house. This will save me a considerable amount of digging.
The 240 circuit will have no termination in the garage, other than the splice from the THWN to the UF. In fact I was planning a separate box just for the 240 volt splice to keep it away from the 120 volt MWBC.
Question is: will I be violating the no more than 1 circuit to a building without a sub panel rule by having the 240 circuit for the pump go thru the garage?
I have considered another small sub panel in the garage/workshop but really do not need the capacity.
Coastal South Carolina