The Square D Homeline SC2040M200PS provides metered service and a main circuit breaker and 16 full branch spaces up to 24 circuits using tandems. All-In-Ones are UL Listed, suitable only for use as service equipment. This device meets EUSERC standarts, Federal Specification W-P-115c as Type 1, Class 2. Supplied with load side feed-thru lugs for 4AWG-250 kcmil Al/Cu conductors.