FeaturesEasy installation50 or 60 a GFCI breaker protection3 or 4-wires installation2 extra 1-pole breaker spaces100 A current ratingUse as a 100 A, 4 circuit sub panel enclosureU4881-O has provision for (2) 2-poles or (4) 1-pole small frame breakers1-phase14 to 1/0, 14 to 1/0, 14 to 1/0 AWG copper/aluminium line and load connector wire range, ground connector wire rangeG90 galvanized stee