We are installing a separate 400 amp, 3-phase, 120-208 volt service for a residential project. The design is based on the 2014 NEC. The customer is installing a small commerical grade bakery in their basement.
We are proposing to come from the meter to a 400 amp fused service disconnect on the inside of the building. From the load side of the disconnect we would run to one 200 amp main breaker sub-panel and one 200 fused disconnect to feed an oven. The sub-panel and sub-disconnect are located on the same floor but in a separate room. My question is if the installation is code compliant if we install dual rated lugs at the main disconnect to feed the 200 amp disconnect and panel. Or is overcurrent protection for the 200 amp feeders at the main service disconnect location required.
Also, this is the second service to the same building. The original service (staying) is single phase 200 amp. Are the two services required to be bonded together? What NEC article would reference this. Thanks.
We are proposing to come from the meter to a 400 amp fused service disconnect on the inside of the building. From the load side of the disconnect we would run to one 200 amp main breaker sub-panel and one 200 fused disconnect to feed an oven. The sub-panel and sub-disconnect are located on the same floor but in a separate room. My question is if the installation is code compliant if we install dual rated lugs at the main disconnect to feed the 200 amp disconnect and panel. Or is overcurrent protection for the 200 amp feeders at the main service disconnect location required.
Also, this is the second service to the same building. The original service (staying) is single phase 200 amp. Are the two services required to be bonded together? What NEC article would reference this. Thanks.