Keystone MPS-400A-P-KIT 400W Pulse Start Mh Ballast Kit

Product Description

The KEYSTONE MPS-400A-P-KIT is a 400-watt pulse start metal halide ballast kit designed for HID lighting systems requiring a complete, ready-to-install assembly. The kit includes a core and coil ballast (MPS-400A-P-CA), a dry film capacitor, an ignitor, a mounting bracket, and all necessary hardware. Operating on a constant wattage autotransformer circuit, it accepts five input voltages: 120, 208, 240, 277, and 480 volts, making it compatible with a wide range of commercial and industrial electrical services. Input power draw is 454 watts at full load. This kit is intended for installation by licensed electricians working on commercial, industrial, or outdoor lighting projects.

This ballast kit suits commercial and industrial pulse start metal halide fixtures commonly found in warehouses, parking structures, sports facilities, and outdoor area lighting. The 5-tap voltage configuration allows a single SKU to serve multiple service voltages, reducing the need to stock multiple ballasts. The included capacitor and ignitor simplify procurement and ensure component matching. ANSI code M155 applies. The kit is UL and cUL listed for use in the United States and Canada.

Key Features

• Complete kit includes ballast, ignitor, dry film capacitor, mounting bracket, and hardware
• 5-tap voltage rating covers 120, 208, 240, 277, and 480 volts in a single unit
• Core and coil construction with constant wattage autotransformer circuit
• ANSI M155 pulse start metal halide lamp compatibility
• Copper primary and aluminum secondary coil materials
• UL and cUL listed for U.S. and Canadian installations
• RoHS compliant

Compatibility

Designed as an OEM-style replacement or new-installation ballast kit for 400-watt pulse start metal halide fixtures carrying ANSI code M155. The included ballast component is model MPS-400A-P-CA.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and applicable local codes. Disconnect and lock out all power to the fixture before removing the existing ballast or wiring any components. Verify the input voltage tap on the ballast matches the supply voltage before energizing. Lead length on this assembly is 12 to 14 inches; ensure adequate clearance and proper strain relief inside the fixture housing.