Hanging Christmas lights is a great tradition. It’s also the time of year we plug the most electricity into the snow — and when tripped breakers and, sadly, seasonal fires climb. A few simple rules change everything.
Light it up without tripping the breaker (or worse)
Hanging Christmas lights is a lovely Quebec tradition. It’s also the time of year we plug the most electricity outside, in the snow and cold — and when tripped breakers and, unfortunately, seasonal fires rise. The good news: a few simple rules are enough for a safe display that won’t cut the power and lasts all winter.
The 5 golden rules
Follow them and you’ll avoid 95% of holiday problems.
A GFCI outdoor outlet
Outside, GFCI protection is required: it cuts power at the slightest leak (melting snow, rain). It’s what protects you from electrocution.
Outdoor-rated cords
Use only cords marked for outdoor use (“outdoor” or the letter W). Indoor cords resist neither cold nor moisture.
Don’t overload
Add up the number of strings on one circuit. Don’t chain cords endlessly and don’t plug everything into one outlet (see the math below).
LED lights
LED strings use about 10 times less than incandescent: far more lights per circuit, much less heat, and a lighter bill.
The outdoor outlet: GFCI and a weatherproof cover
A compliant outdoor outlet isn’t just an ordinary outlet moved outside. It must be:
- Protected by a GFCI — essential near moisture, required by Code.
- Fitted with an “in-use” weatherproof cover (the “bubble” cover that closes even with a plug inserted), to keep rain and snow out of the contacts.
How many strings per outlet?
A typical 15 A household circuit offers about 1,440 W usable — and it often already powers other things. The difference between incandescent and LED is dramatic:
Incandescent strings
≈ 40 W each. You hit the limit fast: a few long strings and the breaker trips. It’s the #1 cause of December outages.
LED strings
≈ 4 W each. You can chain many more safely, with far less heat at the connections. The obvious choice.
Snow, ice and connections
Cold and water are the enemies of outdoor connections. Keep these reflexes.
- Leave no connection in the snow or a puddle: raise them, protect them, or use weatherproof covers.
- If the GFCI trips repeatedly, it’s often water in a connection: it’s doing its job. Dry, raise, and never bypass it.
- A hot cord under the snow is overloaded: unplug and spread the load.
- Secure strings with proper clips, never nails or staples that pierce the insulation.
- Unplug everything before clearing snow near the decorations.
No more cords: the soffit plug
Tired of pulling out the extension cords every year? More and more homeowners have soffit plugs installed (under the roof overhang) controlled by an indoor switch or a smart plug. The roofline lights are plugged in once and turn on at the push of a button — no ladder, no cord across the yard, no connection in the snow. You can also add GFCI outdoor outlets in the right spots (porch, entrance, back) for all your displays.
Ready for the holidays, with no cord across the yard
A CMEQ-certified company holding an RBQ licence, serving Greater Montreal, Laval, the North Shore, the Laurentians and Lanaudière. We install GFCI outdoor outlets, soffit plugs and timers — for a safe display, switched on at the push of a button.
Want to be done with extension cords?
GFCI outdoor outlets and soffit plugs controlled from inside. Plan before December.
What people ask us
Do I need a GFCI outlet for outdoor Christmas lights?+
Yes. Any outdoor outlet must be protected by a GFCI, which cuts power at the slightest leak caused by snow or rain. It’s what protects you from electrocution outside. It should also have an “in-use” weatherproof cover that closes even with a plug inserted.
How many light strings can I plug into one outlet?+
It depends on the type. Incandescent strings use about 40 W each: you quickly reach the limit of a 15 A circuit (about 1,440 W) already shared with other loads. LEDs, at about 4 W each, let you chain many more. Respect the chaining limit on the packaging and spread large displays across several outlets.
Why does my breaker trip when I plug in my lights?+
Because the circuit is overloaded: too many strings (especially incandescent) or other appliances drawing together more than the circuit’s capacity. Switch to LED, spread displays across several outlets, and avoid chaining cords. If it persists even with few lights, have the circuit checked.
Can I use an indoor extension cord outside?+
No. Indoor cords don’t withstand cold or moisture: the insulation weakens and the risk of shock and short circuit rises. Use only cords marked for outdoor use (“outdoor” or the letter W), and keep connections out of snow and puddles.
My outdoor GFCI keeps tripping in winter — what should I do?+
It’s almost always water or melting snow that got into a connection: the GFCI is doing exactly its job by cutting power. Dry and raise the connections, use weatherproof covers, and check your cords. Never bypass a GFCI to stop it from tripping: you’d remove your protection against electrocution.
Are LED lights really safer?+
Yes, on two counts. They use about ten times less power, which greatly reduces the overload risk and lets you install more on one circuit. And they run very cool, which lowers the risk at connections and on materials, compared with incandescent bulbs that get hot.
How do I avoid pulling out extension cords every year?+
By having permanent outdoor outlets installed: GFCI outlets in the right spots, or soffit plugs under the roof overhang controlled by an indoor switch. The lights are plugged in once and turn on at a button, with no ladder or cord across the yard. It’s a popular upgrade, to plan before December.
How much does it cost to install an outdoor outlet?+
At Groupe Quenneville, a regular visit is $150 travel plus $140/hr (1 hr minimum). We install GFCI outdoor outlets with weatherproof covers, soffit plugs controlled from inside, and outdoor timers. The exact cost depends on the location and the routing: we confirm it in a free quote.
