64 4-Wire 3-Phase Group metering main circuit breaker has current rating of 400-Amps and voltage rating of 120/208-Volts. It features aluminum bus construction for corrosion resistance and du73ility. The KD circuit breaker has interrupt rating of 65-Kilo-Amps. Circuit breaker is NEMA 3R rated for safety. It measures 48.125-Inch x 22.6-Inch x 15-Inch. Group metering main circuit breaker is UL listed.