What to Do When Christmas Lights Keep Blowing the Fuse

Christmas lights are one of the most popular parts of the holiday season. There's few things that make people happier than seeing houses illuminated with colors or bright white lights. All these lights do create a problem, however. There must be a sufficient power source to generate the energy necessary to light all those little bulbs. If you connect too many lights to one power source, you'll end up blowing a fuse, and none of the lights will work. Fortunately, there are some easy tips you can follow to prevent the dreaded Christmas light-induced blown fuse.

Step 1

Remove and replace the fuse in the string of lights. The fuse will look like all the other Christmas lights, but with a painted tip. This fuse prevents the entire string of lights from overloading when too much power flows through, such as when you connected too many lights for your electrical source to handle.

Step 2

Read the instruction manual for your Christmas lights. Each manufacturer has a specification of how many strings of Christmas lights you can string together without blowing the fuse. Sometimes this number can be as high as five strings, while other brands state that you can only use three. Follow these instructions to prevent another blown fuse.

Step 3

Disconnect any excess strings of Christmas lights so you are in compliance with the manufacturer's specifications. You do not have to disconnect every single string of Christmas lights from each other; you just need to make sure that there are no connections that exceed the specification.

Step 4

Find alternative power outlets to connect the other Christmas lights. This may require the use of an extension cord if the nearest outlet cannot be reached by the lights.


Never try to turn on your Christmas lights without the fuse in. The fuse protects against overloading, which can cause an electrical fire.

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