As some of you might remember, I own a well working Onan DJE
generator, 7kW continuous.
I will soon start working on setting up a proper transfer switch. I am
now deciding which one.
3400 sq ft house plus finished full basement, 200A service, almost all
slots in the panel taken. A lot of little circuits. (which has its
advantages). Many of these circuits power very small equipment like
lights, phones etc.
The generator will be installed behind the house, very close to the
panel. It will still be on its carriage.
My objective is to do work that can be UNdone if I want to sell the
house. Hence, I would prefer to not do any service entrance type work.
I have, logically, two alternatives.
1. Buy a prewired transfer switch.
2. Add a large subpanel, move all breakers that I want to be on a
generator, there, and insert a transfer switch between subpanel and
Note that this would involve also making wire connections in the main
box, since the circuits are terminated in the main box, obviously, but
the breakers will be in the subpanel box. Because of this, I am not
sure if choice 2 is even legal.
Assuming it is, I see some advantages of 2) over 1).
1. Being able to add more circuits due to having an extra subpanel.
2. Being able to power more circuits in case of an outage, and being
able to choose which ones to turn on and off, with breakers.
Any thoughts on this will be appreciated.