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 TL412RT1 features space for 4, 1" breakers, a 125 A bus ampere rating, a factory included ground bar, and an outdoor suitable enclosure.