Hi newb here.
I just installed a 8 slot sub panel next to my main 40 slot 200A panel in my home. I had used tandem breakers for a few circuits in the main panel before. I later learned about the CTL and 40 branch limit of a single 200A cabinet and the tandems had me at 44 circuits. Hence the change.
I have a couple questions:
1) Grounding sub panel. I didn't ground the subpanel per se. It is 3" from the main panel and I used a 3" long 1 1/4" rigid conduit nipple with lock nuts to join the cabinets. I am thinking this satisfies the grounding requirements for the cabinet. I did NOT install the bonding wire/screw on the neutral bus of the sub cabinet. The neutral bus is wired back to the main panel neutral bar. I have a 60A breaker feeding the sub panel with 6AWG wire for each phase and a white one for the neutral. I am in IL so everything is EMT here. Consequently I don't have Romex cables in cabinet with grounds going to ground bar. The EMT is considered the ground. Does this sound OK or should I bond the cabinet case with a bare 6AWG wire from ground bar of main panel to case of sub panel?
2) Running wires across panels. Since I live I IL with EMT mandate I already have several home run lines of EMT to my main panel. I need to run another branch circuit to my garage from the new sub panel I just installed. I can get most of the way to where I need to go using existing EMT and just add a short length to the last box in the garage. That means at the panel the wires will enter the panel on the main panel and then I will route them to the sub panel via the 1 1/4:” stub I have between the panels before terminating on the neutral bus and breaker. Is it with NEC to run wires through one panel enroute to the final destination in an adjacent panel (assuming I don't violate EMT fill limits)?
3) Mixed 120/240 branch circuit. I have run a 3 wire dual pole (locked tab breaker) to my garage for some plugs (split duplex) and a 240 V outlet for my compressor and MIG welder. I have split the top and bottom half of the six 120V outlets and run alternative phase to hot of each duplex half. They share a common neutral. The 240 V outlet is both hot phases and ground. Is it OK to mix a 240 outlet with several 120V split phase receptacles or does the 240 need to be a dedicated branch by itself? The breaker is dual pole 15A with the poles joined. The wire is three conductors 14 AWG in EMT. I am only interested in a NEC compliance perspective not what might be better.
I just installed a 8 slot sub panel next to my main 40 slot 200A panel in my home. I had used tandem breakers for a few circuits in the main panel before. I later learned about the CTL and 40 branch limit of a single 200A cabinet and the tandems had me at 44 circuits. Hence the change.
I have a couple questions:
1) Grounding sub panel. I didn't ground the subpanel per se. It is 3" from the main panel and I used a 3" long 1 1/4" rigid conduit nipple with lock nuts to join the cabinets. I am thinking this satisfies the grounding requirements for the cabinet. I did NOT install the bonding wire/screw on the neutral bus of the sub cabinet. The neutral bus is wired back to the main panel neutral bar. I have a 60A breaker feeding the sub panel with 6AWG wire for each phase and a white one for the neutral. I am in IL so everything is EMT here. Consequently I don't have Romex cables in cabinet with grounds going to ground bar. The EMT is considered the ground. Does this sound OK or should I bond the cabinet case with a bare 6AWG wire from ground bar of main panel to case of sub panel?
2) Running wires across panels. Since I live I IL with EMT mandate I already have several home run lines of EMT to my main panel. I need to run another branch circuit to my garage from the new sub panel I just installed. I can get most of the way to where I need to go using existing EMT and just add a short length to the last box in the garage. That means at the panel the wires will enter the panel on the main panel and then I will route them to the sub panel via the 1 1/4:” stub I have between the panels before terminating on the neutral bus and breaker. Is it with NEC to run wires through one panel enroute to the final destination in an adjacent panel (assuming I don't violate EMT fill limits)?
3) Mixed 120/240 branch circuit. I have run a 3 wire dual pole (locked tab breaker) to my garage for some plugs (split duplex) and a 240 V outlet for my compressor and MIG welder. I have split the top and bottom half of the six 120V outlets and run alternative phase to hot of each duplex half. They share a common neutral. The 240 V outlet is both hot phases and ground. Is it OK to mix a 240 outlet with several 120V split phase receptacles or does the 240 need to be a dedicated branch by itself? The breaker is dual pole 15A with the poles joined. The wire is three conductors 14 AWG in EMT. I am only interested in a NEC compliance perspective not what might be better.