Do not use an extension chord

Discussion in 'General Electronics Chat' started by Nathan Hale, Aug 23, 2014.

  1. Nathan Hale

    Thread Starter Active Member

    Oct 28, 2011
    Hi all! Hope all is well.

    i just bought a Frigidaire dehumidifier.

    the manual and the website are screaming all over .."DO NOT USE AN EXTENSION CHORD".
    my question to you guys is why am i not allowed to use an extension chord if the gauge and power rating of the extension chord is good enough to run this load?
    thank you for your replies!
    Electrical Specifications

    Amps (Cool): 4.8
    Horsepower (Cool): 0.71
    Plug Type: 5-15P
    Power Cord Length: 6' (6-1/2')
    Voltage Rating: 115V, 60Hz
    Watts (Cool): 530
    Last edited: Aug 23, 2014
  2. MikeML

    AAC Fanatic!

    Oct 2, 2009
    absf likes this.
  3. crutschow


    Mar 14, 2008
    I assume you mean an extension cord. ;)

    I don't see a problem using an extension cord if it's rated for at least 10A.
  4. jamus


    Feb 11, 2013
    Yeah, what MikeML said. Dehumidifiers are probably prone to making puddles on the floor, so you don't want a junction between two cords there.
  5. ErnieM

    AAC Fanatic!

    Apr 24, 2011
    It's a safety issue. Every time you put an interruption in the current path you add another possible trouble spot. The plug/socket connections themselves will heat up, and the wire size will depend on how long the extension cord is, as the wires themselves will heat up.

    It's actually a bit involved to select the proper extension for a high powered device such as this.
  6. Brownout

    Well-Known Member

    Jan 10, 2012
    I use extension cords on appliances that I'm not supposed to with no problems. Keep in mind that the startup current requirements for this will be many times more than what was on the specs, and size your cord accordingly.
  7. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
    Its a statement required to obtain the UL listing for that device.

    #1- extension cords are UL listed for temporary use only.
    #2- most consumers are not knowledgeable enough to choose a proper extension cord.
    absf and #12 like this.
  8. #12


    Nov 30, 2010
    I think mcgyvr did a good job here. (This machine will take about 40 amps as a start surge.)

    I once had a customer give me an air compressor because it kept overheating. The problem was a 16 gauge extension cord. Well, the label said it only used 12 amps, right?
    Not at 50 feet from a proper power wire!