Hello, i am installing new breakers at the top of my breaker box/panel for whole house surge suppression. They say they should be at the top of the box. Thus I will need to move the existing breakers down to the bottom. The existing wires going to the breakers do not have enough length to move the breakers down further in the panel. My question, it is fine to extend the black wire using a wire nut so that it will reach down to where the breaker will need to reside? It seems as if it would meet code as the breaker box is a closed box just like a junction box would be. I will add a junction box if I have to (to do it right), but thought I would check first before going to that trouble.