Rock knocker
Veteran Member
Since no one will come right out and tell me what ESA stands for I'll have to guess that ESA is the inspection agency and this is a permitted job.
I don't think any interlocks are fully UL rated. If that is what is being required you'll need a trasfer switch.
I don't think any interlocks are fully UL rated. If that is what is being required you'll need a trasfer switch.