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  1. #1
    Join Date
    Jan 2008
    Posts
    6

    Default Lights dimming in home office after installing new Laser printer

    I just upgraded to a laser printer and since plugging it in, the lights in my home office are constantly dimming. I know laser printers use more power, but I am not sure the reason behind the dimming.

    My home office has its own dedicated breaker and it powers 6 pot lights, 2 computers, 2 monitors, my router, high speed internet modem and of course my new laser printer.

    I know it has something to do with power the printer is drawing as it just went to sleep and the lights stop dimming

    Any suggestions on what I can do to correct this issue?

    Thanks in advance

  2. #2
    Join Date
    May 2010
    Posts
    65

    Default Re: Lights dimming in home office after installing new Laser printer

    Laser printers draw approximately a metric crapload of power. The fuser bulb alone can be upwards of 500W. You are probably overloading the circuit.

    Looking at the numbers -

    Computer - probably 500W PSU x 2 = 1000W
    6 pot lights, assuming 60W bulbs = 360W
    two 20" LCD monitors = ~25W x2 = 50W
    Laser Printer = ~750W (though could be 1000W+, depending on brand)

    total = 2,160 W = 18A @ 120V

    So even if you are on a 20A circuit, that's overloaded according to code (load only to 80% of rating). Chances are that it's actually only a 15A circuit.
    Last edited by DougLanglois; 06-29-2010 at 11:10 AM.

  3. #3
    Join Date
    May 2010
    Posts
    65

    Default Re: Lights dimming in home office after installing new Laser printer

    As for correcting the issue, the most direct solution is to install a new outlet on it's own, or an underutilized, circuit.

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