Square D 8903LG80V04 Lighting Contactor 8 Pole 30A

Product Description

The SQUARE D 8903LG80V04 is an electrically held lighting contactor rated for 8 poles with a NEMA 1 enclosure. It carries a 20-amp rating for tungsten lamp loads and a 30-amp rating for fluorescent lamp loads, with a control circuit voltage of 277 VAC at 60 Hz. The contactor uses an 8NO contact configuration, meaning all eight poles are normally open. Licensed electricians install this type of contactor in lighting control panels to switch large banks of lighting loads from a single low-voltage control signal. It is well-suited for commercial and industrial lighting distribution where centralized switching of multiple circuits is required.

This contactor is designed for use in commercial and industrial electrical systems where multiple lighting branch circuits must be switched simultaneously. Typical applications include office buildings, warehouses, parking structures, and retail facilities where energy codes or automated control systems require centralized lighting management. The NEMA 1 enclosure rating makes it appropriate for indoor installations in clean, dry environments such as electrical rooms and panelboard enclosures. The electrically held design means the contactor requires continuous coil energization to maintain the closed position, which is standard practice in building automation and time-clock-controlled lighting systems.

Key Features

• 8-pole normally open contact configuration for switching up to eight independent lighting circuits
• 20-amp tungsten and 30-amp fluorescent load ratings to match common commercial lighting types
• 277 VAC at 60 Hz control circuit voltage, compatible with standard single-phase lighting panel voltage
• Electrically held coil design for use with time clocks, building automation systems, and relay panels
• NEMA 1 enclosure rating for indoor dry-location installation
• CSA certified, UL Listed, and RoHS compliant

Compatibility

Designed as an OEM-style replacement for electrically held lighting contactors in commercial indoor electrical panel applications requiring NEMA 1 enclosure ratings and 8-pole switching capacity.

Installation Notes

Installation should be performed by a licensed electrician in accordance with applicable NEC requirements for lighting control equipment. De-energize all affected circuits at the main disconnect before removing or installing the contactor. Verify that the control circuit voltage source matches the 277 VAC coil rating before energizing. Do not exceed the rated amperage for each load type, as tungsten and fluorescent ratings differ and mixing load types without derating can cause premature contact wear.