Your safety is our concern! To help you prevent common holiday electrical hazards, below are several tips for safe holiday lighting.
Reminders About Outdoor-Rated vs. Indoor-Rated Equipment
Outdoor-rated (e.g., NEMA 3R, 4X, UF cable) is built to withstand environmental hazards. It features UV resistance, corrosion resistance, and watertight seals to protect against rain, snow, sleet, and ice.
Indoor-rated (e.g., NEMA 1, 12, NM-B cable) is designed for dry, controlled environments and lacks these protections.
Safety Rule: Never use Indoor equipment, cable, or extension cords in a wet or exposed outdoor location, as it leads to insulation breakdown, short circuits, and shock hazards. Use the correct rating for the intended environment.
Tips on Inspecting Extension Cords and Decorative Lights
- Check the Cord/Wire: Look for cracks, cuts, exposed copper, or fraying along the entire length. Pay special attention to areas near plugs and sockets where wires frequently bend.
- Inspect Plugs: Ensure all prongs are straight and intact (especially the ground pin). Look for any signs of melting, burn marks, or discoloration which indicate overheating.
- Examine Light Sockets: Check sockets for cracks, corrosion, or loose connections. Replace any missing, cracked, or broken bulbs immediately to prevent shorts.
- Feel for Heat: If the cord or plug feels hot to the touch when plugged in, unplug it immediately—this signals an overload or damaged internal wiring.
- Check Fuses: In decorative light plugs, check the small fuse compartment. A blown or blackened fuse needs replacement with the correct amperage size.
Replace any damaged cord or light string immediately—do not use electrical tape for major insulation repairs.
The Importance of GFCI Outlets for Exterior Lighting
Exterior outlets are constantly exposed to moisture (rain, snow, dew) and damage (pets, lawnmowers). Water contacting live wires creates a ground fault, which means electricity is seeking an unintended path, often through a person or animal.
The Ground Fault Circuit Interrupter (GFCI) outlet monitors the electrical current. If it detects even a tiny imbalance (as little as 5 milliamps), it shuts off power instantly (in milliseconds). This swift action prevents severe or fatal electrical shocks and is required by code to keep holiday lighting and other outdoor power use safe.
