Square D 8903LG60V04 Lighting Contactor 6 Pole 277V

Product Description

The SQUARE D 8903LG60V04 is a 6-pole, electrically held lighting contactor rated for commercial and industrial lighting control applications. It carries a 20-amp rating for tungsten loads and a 30-amp rating for fluorescent loads, with a control circuit voltage of 277 VAC at 60 Hz. The contactor uses a 6NO contact configuration, meaning all six poles are normally open. Electrically held designs require continuous coil power to keep contacts closed, which makes them well suited for lighting panels where power must be maintained through a control circuit. Licensed electricians and electrical contractors are the primary installers of this device.

This contactor is intended for use in commercial lighting control panels, tenant lighting circuits, and building automation systems where centralized switching of multiple lighting branch circuits is required. Typical installations include office buildings, retail spaces, warehouses, and other facilities running fluorescent or tungsten fixture loads. The NEMA 1 enclosure rating makes it appropriate for indoor, dry locations. With six poles, it can simultaneously control six separate circuits from a single contactor body, reducing panel space and simplifying control wiring.

Key Features

• 30-amp fluorescent load rating and 20-amp tungsten load rating across 6 poles
• Electrically held operation for continuous-duty lighting control circuits
• 6NO contact configuration switches all six poles simultaneously
• 277 VAC at 60 Hz control circuit voltage matches standard commercial lighting panel voltages
• NEMA 1 enclosure rating for indoor, dry-location panel installations
• UL Listed and CSA certified; RoHS compliant

Compatibility

Designed as an OEM-style replacement or direct-install electrically held lighting contactor for commercial lighting control panels requiring a 6-pole, NEMA 1 rated device at 277 VAC.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. De-energize the panel and verify zero voltage with a meter before making any wiring connections. Electrically held contactors require a continuous control circuit signal to maintain closed contacts; loss of control power will open all poles. Confirm that the control circuit voltage source matches the 277 VAC coil rating before energizing.