How to Install Multiple Light Fixtures on One Circuit

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Installing multiple lights to one circuit will allow you to use only one breaker and save space in the breaker box for different circuits in the future. Calculate the amps of your lights combined to the amp of the circuit so that it is not overloaded. You also only want to use electrical wire that is matched to the circuit you are installing it on. Installation is simple when following the proper steps, and you will be saving money by doing it yourself. This article will explain how to install multiple light fixtures on one circuit.

Skill level:
Moderately Easy

Things you need

  • Phillips and flat end screwdriver
  • Wire cutter and stripper
  • Plasti-caps

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  1. 1

    Turn off the electricity at the breaker box using the main breaker switch.

  2. 2

    Run your wire from your light to the existing light that you want to tie into, if you want them to turn on with the same switch. If you are using a separate on and off switch, then you will need to run the wire from your new light to the new switch. Next, run another wire from the new switch to the existing switch by going under the house and using wire holders to hold the wire along the joist and then following the old wire up the wall to the old switch. Unscrew the faceplate on the old switch by unscrewing the middle screw. Unscrew the old switch's two screws, then pull toward you.

  3. 3

    Strip the new wire back 1 inch. If you are using an existing switch to control all the lights, then you can tie the new light into the old one. Unscrew the existing light fixture and pull toward you. Put the new wire through the conduit box and twist together the new black and white wire to the existing black and white wire and capping them together. If you are using a new switch, then you will tie in to the wire that is at the existing old switch. Once your new wire has been run to the old switch, screw the black wire to the bottom screw of the switch. Cap the white wire together to the existing white wires.

  4. 4

    Screw back in the old switch and put back on the faceplate.

  5. 5

    Turn back on the electricity once installation is complete. Test your installation.

Tips and warnings

  • Turn off the main electricity before starting

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