Al Pike
Member
- Location
- Honesdale, Pa
A common installation I've been running across is two wire sub panels for 220v HVAC units. The electricians are installing 4/8 circuit 125a ML panels typically with 4/2 w/6 ground bonded with the screw to the provided bar. Then they'll install 2-30a 2pole breakers for each unit.
My problem is it leaves a potential future problem with someone tapping off for a 110v circuit, I've ran across it already. I've required labeling to be installed stating 220v power only no grounded conductor at the panels. Am I missing something or is this a normal application instead of installing 3-wire. We're only 20ft from the panel and I don't see why two cheap 60a 2pole disconnects aren't used with two separate circuits. Thanks for the input.
My problem is it leaves a potential future problem with someone tapping off for a 110v circuit, I've ran across it already. I've required labeling to be installed stating 220v power only no grounded conductor at the panels. Am I missing something or is this a normal application instead of installing 3-wire. We're only 20ft from the panel and I don't see why two cheap 60a 2pole disconnects aren't used with two separate circuits. Thanks for the input.