B-Line 215 MTBH MS15 Eaton series meter breakers

The 215 MTBH MS15 is wired 1 phase, 3 wire, so it suits a standard single-phase service, and it takes a 5-jaw meter socket rather than the more common 4-jaw. It is rated 100 A with one meter position. If the utility meter on site is a 4-jaw self-contained socket, this is not the right can, the 5th jaw is there for a voltage/neutral reference the utility specifies.

It is EUSERC Approved, which is what utilities in the western states require on service equipment, and it carries UL certification. That combination is what an inspector and the serving utility both look for before they will set a meter.

The line lugs accept #14 through 2/0, which covers the usual 100 A service conductor sizes in both copper and aluminum. Load side terminations are made at the main circuit breaker rather than at separate load lugs.

The 215 MTBH MS15 is built with a 480 V breaker as a special feature, and it is configured 1 phase 3 wire with a 5-jaw socket, the arrangement utilities commonly specify for higher voltage single-phase metering. Verify the voltage and jaw configuration against the utility's service sheet for the site before setting the can.

Interrupt rating is 42 kAIC. That is well above the available fault current at most 100 A residential and light commercial services, so on a typical transformer-fed drop it is not the limiting component. Confirm the utility's available fault current at the service point against that 42 kAIC figure on larger or close-coupled transformers.

It uses a test block for bypass. That lets a utility tech or electrician connect test equipment and maintain service through the socket during meter changes, instead of the lever bypass some utilities specify. If your utility's spec calls out a lever or horn bypass, this is not the unit for that opening.

Ring type. The meter is retained by a sealing ring, so the utility must be set up for ring style sockets. Ringless cans use a hinged cover over the socket and the two are not interchangeable once the can is on the wall, so match what the serving utility issues meters for.

One meter position only, so it serves a single tenant or a single service. For a duplex, a small strip center, or any multi-tenant building you need a multi-position meter pack or a meter stack, not this can.

It is Eaton B-Line series, manufacturer part number 215 MTBH MS15, a 100 A single-position meter breaker with a 5-jaw socket. Order by that MPN, the MS15 suffix and jaw count are what separate it from the adjacent models in the series.