The interlock makes it so only 1 breaker can be on. The main panel breaker, or the generator breaker. So, you turn off the main 200amp breaker, slide the metal interlock, and now you can turn on the generator breaker.
Attachment 272502 click on the picture to see larger, then click again to zoom in.
Your panel needs to have a interlock kit for it. It usually needs the 2 top right spaces for the generator breakers. If your panel is full, a lot of times you can get half breakers to help make some room.
Sometimes it don't make sense to me. When the power goes off things like a clothes dryer which pulls a lot of power does not start back up automatically, but a water heater that was heating at the time of power lost will try to start up when power is reapplied. If your generator is too small to restart your load and you forgot to turn off the breakers there's the potential problem.
Not all Local codes call for the permanent ginny but most do.
What if you do overload your generator,, It has it's own breaker to protect it's self .. As for the DPDT switch after the meter,, you need a breaker or fuses before it.. so at that point it could be DIY...
One downside is you then have no indication of when utility power is restored (unless you have nearby neighbors you can see), so we had an LED indicator wired into the utility side to tell us.
This system works great for us, but it doesn't include automatic transfer (nor is our generator auto-start) so it doesn't work while were are away.
Here's another possibility for a whole house transfer switch.
Honda HP2S Portable Power Systems: Universal Transfer Switch
I just don't see why the NEC would care if I overload and damage my own generator. I must be missing something.Quote:
Originally Posted by Steave
I wired in the ProTran 10 circuit model. Works great... no problems. Got to use it for 4 hours a couple weeks ago when the power went out. The Honda 5500 fired up instantly, never missed a beat. Great setup.