Eaton 35MM Series commercial meter stack modules assist technicians in the quick, flexible and easy installation of metering equipment. These meter stacks have NEMA 3R-rated enclosures, making them suitable for both indoor and outdoor applications. They have a solid metal barrier between the meter socket and tenant main breaker / wireway sections to protect the unmetered bus from theft. These UL-listed units can be mounted with 1 / 3 mm modules to allow numerous arrangements.