Square D Meter Centres provide a compact and versatile metering and distribution centre for today's residential, commercial, and industrial markets. All metering stacks have factory installed meter sockets and vertical bus bars, requiring only onsite installation of circuit breakers and main bus links. All meter stacks are designed for CSA Type A "cold metering," sub-service breakers connected on the line side of the meter sockets, protecting the meter and downstream electrical equipment. This Square D Meter Centre meter stack is 3 phase, 4 wire 120/208VAC and has four ringed, seven jaw socket. The meter stack has a 400A vertical bus bar and can provide four subservices. The subservice provides 3 phase, 120/208V 100A with a 65kA short circuit current rating. QDM or QGM circuit breakers are accepted for the subservice breaker. The meter centres meet CSA standards and the box is a steel NEMA Type 1 grey baked enamel enclosure.