Hello! In my attic, I have a bunch of older NM cable that was spliced together not in junction boxes. I would like to tidy it up and put those junctions in boxes. Since it may be NM w/o ground, I wouldn't have an easy way to ground a metal junction box. Is it permissible by code to use a plastic junction box in the attic space? I'm also wondering about using a 1-gang box to make a connection to extend some NM-B elsewhere. It currently runs to a poorly located outlet. I know j-boxes have to remain accessible so I can't use a traditional square box behind the wall there. I would like to use the existing 1-gang box, remove the receptacle, and just make the connection in there. Then, I could cover it up with a blank plate to leave the junction accessible. OK by code? Thanks all!

I recently failed my electrical inspection for something simple and want to confirm before I hook this up. I have 200amp service to my home. I had an electrician install a 100amp circuit breaker to that panel. This is then run outside underground to a non-attached pole barn structure. At that structure is a new 100 amp panel. So I have 4 wires going into this panel. 1 is the neutral that goes to the neutral buss. 1 is ground that goes to the ground buss, which then has a copper wire attached to the buss that leads to 2 very long copper poles in the ground. The final 2 wires feed into another 100amp circuit breaker that is attached at the bottom of the panel, but it is not separated from the other circuit breakers like the main panel in my house. This feeds all the electric to the panel. I failed because the neutral bar didn't have a bonding strap to the panel itself. So how does one determine if the panel is a sub panel or a main panel to a main panel (i.e. requires the bonding strap). Finally, where does one get that nice S-shaped bonding strap?