Square D brand MP Meter Pak meter centers offer a wide range of multi metering applications. UL Listed NEMA Type 3R construction meets EUSERC standards. The 9 inch meter center spacing allows for more sockets per device creating lighter, more compact branch enclosures. This creates lighter and more compact branch enclosures. This MP meter pak is rated at 200 A with 2 positions. It has a 400 A main bus. This system is ring type.