Main lug load centers can be used as a home's main panel or sub panel depending upon your preferences. All ABB load centers are rated up to 60 degree/75 degree centrigrade and is suitable for use with service entrance equipment when installed in accordance with electrical code. The TL42420C features space for 42, 1" breakers, 3 phases, 200 A bus ampere rating, and a combination/flush enclosure.