EZ Meter Pak devices are the industry choice for providing a better solution for multi unit construction needs. EZM main devices are available as main circuit breakers, as main fusible switches or as main lug terminal boxes. The various EZ Meter Pak devices can have main ratings from 225 to 2000 A maximum depending on the version. This main fusible switch can be feed from underground service only. This EZ Meter Pak has a 3P 400 A main switch with a 100 kA short circuit current rating. This main fusible switch requires 300 VAC Class T fuses, which must be ordered separately. The rated operational voltage is 208Y/120 V AC or 240/120 VAC delta. The unit has an aluminum bus bar. The main is rated 400 A. Line phase and neutral lug landing pads are provided for use with Crimp type lugs. Each landing pad will accept 1 lug. The lugs must be ordered separately. This unit has a NEMA 3R surface mounting enclosure that is 69.03 inches tall, 20.46 inches wide and 11.50 inches deep. This main fusible switch unit is UL Listed.