PowerMark Gold convertible load centers arrive as main lug, but have the capability to have a main breaker installed. 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 TLM612FCUDG features space for 6, 1" breakers, a 125 A bus ampere rating, a copper bus, an optional door for 6-8 circuit panel, a factory installed ground bar, and a flush enclosure.