Why Christmas Lights Trip the GFCI When It Rains (and What to Buy)

Why listen to us: Zomg The Handyman crews have done more than 10,000 jobs across all of California since 2009, and every winter the calls change: lights on rooflines in November, cold rooms and dead water heaters in December and January, then leaks, clogged gutters and drafty doors once the storms arrive. This guide is what our installers tell customers before they buy, so the thing you order is the thing that fits your house. A big share of our December electrical calls are lights that stopped working after rain, and almost every one is a wet connection, an indoor cord used outside, or too many lights on one circuit.

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Why the GFCI Trips (It Is Doing Its Job)

A GFCI outlet compares the current going out on the hot wire with the current coming back on the neutral. If a little leaks to ground, through water in a plug or a nicked cord, it shuts off in a fraction of a second. That is the device protecting someone who touches a wet cord. Replacing a GFCI that "keeps tripping" with a regular outlet is the one fix we will never do.

Find the leak instead: unplug every light, reset the GFCI, then plug runs back in one at a time. The run that trips it has the wet or damaged connection. Dry it, lift it, or replace the string.

The Rain-Proofing Checklist

Do this once in November and the lights survive the season.

• Lift every connection off the ground and away from downspouts. A plastic stake, a brick or a hook under the eave all work.
• Point plugs down so water runs off instead of into the socket.
• Use only outdoor-rated cords. Indoor cords stiffen, crack and let water in.
• Put an in-use cover on the outlet and a connection box on cord joints.
• Stay under the maximum connected strings on each box. With LEDs the circuit is rarely the limit; the string's own wiring is.
• Never staple, nail or pinch a cord in a door or window. Run a cord through a window and the window seal cuts it.
• Keep inflatables, which have motors, on their own heavier cord.

Timer or Smart Plug?

A mechanical photocell timer has nothing to update and no Wi-Fi to drop; it is our default for a single display. An outdoor smart plug wins when you want two zones (roofline and yard), voice control, or to turn lights on from your phone when you are away. Wi-Fi often does not reach the front eave; check your phone's signal where the plug will sit before buying.

When You Need a New Outlet

Add an outdoor outlet if you are running cords through a door or window, across a driveway, or more than one cord length to reach the roof. For permanent track lights an outlet near the eave is close to mandatory. An outdoor outlet in California needs GFCI protection and a weatherproof in-use cover, and it should be on a circuit that is not already loaded with a garage freezer or a pool pump. Our crews add or replace them; see the prices below.

Buy It, Then Let Zomg Install It

Our crews install what you buy, from Amazon, Costco, Home Depot or Lowe's, anywhere in California. What it costs on our booking page:

• Outdoor or damp-location GFCI outlet: from $193.50. Replacing an existing outlet with a GFCI: $175.50. A new outlet location: $274.50.
• Troubleshooting dead outlets: $184.50.
• Christmas light installation: from $157.50 for a one-story home up to 150 feet of roofline.

Prices are from our booking page in November 2026 and are what you pay for the work; the booking page always shows the current price and every option before you confirm.

More: electrical work, permanent vs plug-in lights, LED vs incandescent Christmas lights.

Our service areas: Electrical Work in Los Angeles · Electrical Work in San Diego · Electrical Work in Irvine