Lead wires for lighting distribution boxes are pre-wired, low smoke zero halogen cables designed to safely connect multiple luminaires, supporting standard, digital, and emergency lighting systems.

Lead Wire Types and Specifications

Lighting distribution boxes, such as marshalling boxes or dual control/supply boxes, use pre-wired leads to connect luminaires efficiently. These leads are typically low smoke zero halogen (LSZH) and carry CPR ratings like Dca-S1b, d2, a2, ensuring safety in case of fire . Standard lead wires are available in 1.5mm² or 1.0mm² CSA, with lengths ranging from 1m to 5m, depending on the application . For dual control or supply boxes, input terminals can accept multiple conductor sizes, such as 3 × 2.5mm², 2 × 4mm², or 1 × 6mm², allowing connection to different protective devices or circuits . Outlets are usually rated 16A at 230V, supporting both standard on/off and dimmable lighting control .

Connection Methods

Leads are often supplied with pluggable connectors, such as 6-pole or 7-pole latching plugs, which allow easy connection to luminaires or other distribution boxes . This plug-in system enables:

• Direct luminaire connection without permanent wiring
• Linking multiple distribution boxes using link leads
• Adding expansion boxes or tap-off boxes for additional luminaires Some systems also provide switch drop leads, allowing a wall switch to control the lighting via the distribution box . These leads are factory-tested and rated for 16A, with short-circuit testing up to 1500A conditional rating .

Installation and Safety Considerations

• Ensure all leads are connected according to the phase and protective device configuration; dual supply boxes must use the same phase for both circuits .
• Use LSZH cables to comply with fire safety standards.
• Verify the current rating of the leads and distribution box to prevent overloads.
• For digital or DALI-controlled luminaires, ensure the leads are compatible with the control modules and bus outputs .

Summary

Lighting distribution box lead wires are pre-wired, LSZH cables with pluggable connectors, designed for safe, flexible, and expandable lighting installations. They support standard, digital, and emergency luminaires, allow easy linking of multiple boxes, and comply with safety standards for current rating and fire performance . Proper selection and installation ensure reliable operation and simplify maintenance or future expansion.