EATON NS3-400-NA 3 Pole 400Amp Eaton Moeller Molded Case Switch Terrminal Screw

Molded case switches with high short circuit ratings, provides systems designers much greater freedom in the selection of equipment, since no additional consideration of the upstream feeder circuit is necessary up to those ratings. The supply circuit, in practice, will always feature an upstream overcurrent protective device, because the feeder requires overload and short circuit protection, but the type of protective device need not be a concern for the exporter. It can be selected locally in accordance with applicable electrical codes.