For dark-colored cabinets, black or dark-sheathed wires like NM-B with black insulation are ideal for blending in while maintaining proper electrical safety.

Wire Color Considerations

When wiring switches, black wires are commonly used as hot wires and switch legs, carrying electricity from the power source to the switch or light fixture . Using black wire behind dark cabinets helps the wiring remain discreet and visually unobtrusive. Red wires can also be used for switch legs, but black is generally preferred for a cleaner, uniform look . Neutral wires are typically white or gray, and ground wires are green or bare copper; these should still follow code requirements even if partially visible .

Wire Type Recommendations

For indoor residential applications like kitchen or cabinet lighting, the following wire types are suitable:

• NM-B (Non-Metallic Sheathed Cable): Flexible, easy to run behind cabinets, and ideal for standard 120V circuits powering switches and lights .
• THHN (Thermoplastic-Insulated Heat-Resistant Wire): Good for branch circuits or areas where higher temperature resistance is needed, such as near under-cabinet lighting . Avoid outdoor-rated or underground wires like UF-B unless the wiring will be exposed to moisture or buried .

Installation Tips

• Always turn off the breaker before working on any wiring .
• Match wire colors to their function: black for hot, white for neutral, green/bare for ground .
• Use cable clamps or conduits to keep wires neatly tucked behind cabinets.
• If aesthetics are critical, consider black-sheathed NM-B cable or black THHN wires for visible runs, as they blend with dark cabinetry. By combining black-colored wires with flexible NM-B or THHN types, you ensure both safety and a visually discreet installation behind dark-colored cabinets .