Siemens WMC4BF Meter Combination 400A 1-phase 3R

Product Description

The SIEMENS WMC4BF is a combination meter socket and main breaker assembly rated for 400 amps at single-phase service. This unit integrates metering and overcurrent protection into a single enclosure, reducing the number of separate components needed at the service entrance. Rated for 65kAIC short-circuit current, the WMC4BF is built to handle high fault-current environments typical of residential and light commercial applications. The NEMA 3R enclosure rating provides protection against rain and sleet, making it suitable for outdoor installation. Licensed electricians install this type of unit at the utility service point, typically during new construction or service upgrade work.

The WMC4BF is designed for single-phase electrical service entrance applications. Its combination design consolidates the meter socket and main disconnect into one listed assembly, which streamlines rough-in and final inspection on residential and light commercial projects. The NEMA 3R rating makes it appropriate for exterior wall mounting where weather exposure is expected. This unit is well suited for service upgrades where a 400-amp main is required and space or installation efficiency is a priority.

Key Features

• 400-amp service entrance rating for high-demand residential and light commercial loads
• Single-phase configuration for standard utility service connections
• 65kAIC interrupt rating handles high available fault currents
• NEMA 3R enclosure rated for outdoor installation, resisting rain and sleet
• Combination meter socket and main breaker in a single assembly reduces installation complexity

Compatibility

Designed as an OEM-style service entrance combination unit for single-phase 400-amp residential and light commercial electrical service installations.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the NEC and applicable local codes. Confirm that utility requirements and local authority having jurisdiction (AHJ) approvals are obtained before mounting and connecting the service entrance assembly. Always verify that utility power is fully de-energized and locked out before making any connections to the meter socket or main breaker terminals. Do not exceed the marked ampere and voltage ratings of the unit.