Siemens WMM51225RB Meter Stack Module 1200 Amp 225 Amp 240 Volt 120 Volt

Siemens Power Mod WMM51225RB is a 1-phase, 3-wire residential meter stack module designed for outdoor installation. It uses 4-jaw ringless terminations and provides five meter positions per stack, enabling multi-tenant metering in a compact footprint. The unit is rated for 120/240 V AC and supports up to a 225 A maximum tenant breaker, with a 1200 A bus rating. The RB variant includes horn bypass functionality and is part of Siemens’ WMM Power Mod family, catalog number WMM51225RB. This meter stack is intended for outdoor use and serves as a modular building block for single-phase residential metering in multi-tenant installations, offering a scalable solution for distributing loads while maintaining a centralized meter point. Its five-position per stack design aligns with Siemens’ residential meter stack architectures, making it suitable for apartment buildings and other properties that require efficient, organized metering with a cap of 225 A per tenant and robust upstream capacity.