Leviton Telcom 1N277-4D Series 1000 Meter 277V 400A

Product Description

The LEVITON TELCOM 1N277-4D is a Series 1000 electrical meter rated for 277 volts and 400 amps. It is designed for use in commercial and industrial electrical metering applications where accurate power measurement at high amperage is required. Licensed electricians and electrical contractors install this unit as part of a metering assembly in panel boards and service entrance equipment. The 277-volt rating makes it suited for single-phase legs of 480-volt three-phase commercial distribution systems commonly found in office buildings, warehouses, and light industrial facilities.

The 1N277-4D fits into electrical metering setups that require high-capacity measurement at 277 volts. It is appropriate for commercial service entrance applications where branch circuits operate at 277 volts, such as fluorescent and LED lighting circuits fed from 480/277-volt distribution systems. Installation is typically performed by licensed electricians working on commercial or industrial electrical infrastructure.

Key Features

• Rated for 277 volts, suitable for 480/277-volt three-phase commercial distribution
• 400-amp capacity for high-load metering applications
• Part of the Series 1000 metering product family
• Sold as a single unit (each)

Compatibility

Designed as an OEM-style replacement or new-installation meter for commercial and industrial electrical metering assemblies operating at 277 volts.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC). The service entrance and all upstream overcurrent protection must be de-energized and locked out before handling metering equipment. Verify voltage and amperage ratings match the service requirements before installation. Do not exceed the 400-amp rating of this meter.