General and Application Information

Power-Style^™ Commercial Multi-Metering (CMM) meets the high quality design standards expected from Schneider Electric. Applications include strip shopping centers, office complexes, resorts, and similar multi-tenant facilities. Power-Style CMM follows a standard construction process to meet delivery requirements, yet is versatile and flexible enough to meet the customization needs of individual projects.

Power-Style CMM is UL Listed. It meets applicable standards for commercial multi-metering equipment, including standards for Electric Utility Service Equipment Requirements Committee (EUSERC) utility compartments, NEMA Type 1 and NEMA Type 3R enclosures, and National Electrical Code (NEC) wire bending space. Applicable standards also apply for the installed devices, including meter sockets, circuit breakers, and fusible pullouts.

In addition, Power-Style CMM is UL Listed for dead front construction and suitable for use as a service entrance (when required). The totally frontaccessible design makes it easy to install and to add tenant circuits at the job site.

Utility metering compartment barriers are placed between the user compartments. The covers have sealing provisions.

Commercial Multi-Metering Lineup: Main and Meter Mains (≤ 200 A)

UL Standard 891 limits the maximum peak let-through current of selfcontained meter sockets to 30,000 A. The use of devices connected in series with meter sockets must be tested and the peak amperes must be measured, unless the over current protective device peak letthrough ampere value is known to be 30,000 A or less. This provides a true SCCR for the entire assembly from incoming line termination provisions to load cable termination provisions.

Schneider Electric has performed the necessary tests to determine the actual SCCR of Class 2756 Power-Style CMM with available devices installed. The results are summarized in the tables on the following pages. These tables list the UL Listed SCCR for each combination tested. The ratings are for hot sequence metering.

Ratings vary depending on incoming section and branch device selection. The rating of the line-up is that of the lowest rated device in the line-up.

Ground fault protection is provided on all 480Y/277 V mains and large tenant mains at 1000 A and greater.

Customer-accessible area for top-exiting load cables.

The meter sections are available in two configurations: a three-socket section and a six-socket section. Each section accepts circuit breakers or fusible pullouts as tenant main disconnects, but the two types cannot be mixed in the same section.

For self-contained meter sections and large tenant main sections > 200 A, bottom exit of the tenant loadside cables is standard. For self-contained meter sections < 200A, top exit of tenant loadside cables is standard. If top exit is required for large tenant mains > 200A, a choice of a barriered rear load wireway (NEMA Type 1 only), loadside wireway, or bussed loadside wireway is offered.

The meter sockets are rated for 200 A continuous duty. They are available in 5-jaw or 7-jaw construction, and are provided with a test block that meets EUSERC requirements. Factory-installed devices come completely wired from meter socket to disconnect, and from meter socket to line bus. Provisions for adding tenants are available. Field-installed devices are added by wiring from the line bus to the meter socket, then wiring to the tenant main disconnect. Before installing a meter socket, follow the instructions supplied with the commercial multi-metering lineup, with the meter socket kit, or both.

Commercial Multi-Metering Lineup: Main and Meter Mains (≤ 200 A)

Tenant main disconnects are available with circuit breakers and fusible pullouts in the following ampacities:

• 60–200 A for self-contained meter sockets

• 400 A and higher for CT-rated meter compartments

Circuit breakers have voltage ratings of 240 V, 480Y/277 V, or 480 V. The SCCR range is from 18,000–100,000 A rms symmetrical.

Fusible pullouts use Class T fuses and are rated for 60, 100, or 200 A maximum.

• 240 V pullout uses a 300 V Class T fuse on all systems 240 V and below

• 600 V pullout uses a 600 V Class T fuse on any system 480 V and below

The SCCR for both pullouts is 100,000 A RMS symmetrical.

3-phase Meter Socket

Cable Terminations on Line Bus