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  1. #1
    Join Date
    Apr 2010
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    4

    Default Dishwasher on GFCI

    I have a dishwasher and disposal on their own circuit as well as one GFCI "upstream" of both of these units.

    Question: when I run the dishwasher it starts, but as soon as a heavy cycle starts (about 1 minute in), the DW kicks off. However, the disposal still works and the GFCI is not tripped. I can restart the DW by clicking on 'Start' again, but the problem repeats about one minute into the wash.

    I suspect I need to (1) move the GFCI downstream of the DW, (2) replace the GFCI with a standard outlet, or (3) remove that outlet altogether and leave the DW and disposal on their own (15 amp) circuit.

    Any help? Why does the DW stop but the GFCI isn't tripped? Bad GFCI?

  2. #2
    Join Date
    Apr 2010
    Posts
    4

    Default Re: Dishwasher on GFCI

    I finally got the DW to start, but was able to kill the circuit by clicking on the disposal. This is a 15 amp circuit that goes straight to GFI which is then split to the disposal and DW. After some research it is apparant that this is not a good idea. I'm going to reconfigure the GFI (since it's right next to the kitchen sink and switches) to be the end of line on this circuit.

  3. #3
    Join Date
    Mar 2009
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    1,387

    Default Re: Dishwasher on GFCI

    Howdy i have not heard of why one would have a GFI on the dishwasher an or disposal circuit. Might consider replacing it with a non gfi circuit breaker. Code now requires both of these appliances to be on their own dedicated circuits. The reason is the start up of the motors may overload a single breaker if both start at same time. Do you have any other loads on this circuit?

  4. #4
    Join Date
    Jun 2007
    Location
    Shamokin, Pa.
    Posts
    645

    Default Re: Dishwasher on GFCI

    Quote Originally Posted by Timothy Miller View Post
    Howdy i have not heard of why one would have a GFI on the dishwasher an or disposal circuit. Might consider replacing it with a non gfi circuit breaker. Code now requires both of these appliances to be on their own dedicated circuits. The reason is the start up of the motors may overload a single breaker if both start at same time. Do you have any other loads on this circuit?
    It is prudent to supply the DW on separate circuits. But crunching the numbers on 2010 equipment may surprise you. Doing some code sleuthing, I can only turn up a requirement on a dedicated supply for a DW. A FD can be placed on a small appliance circuit serving kitchen receptacle outlets {not counter outlets though**, and outlets in other rooms specified in 210.52{B**{1**.

  5. #5
    Join Date
    Mar 2009
    Posts
    1,387

    Default Re: Dishwasher on GFCI

    Howdy dedicated circuit for dish washer and disposal was not referring to national code but state adopted codes .
    So as always be sure to check with the state electrical department for amendments to the national code.

  6. #6
    Join Date
    Jun 2007
    Location
    Fayette County, Ohio
    Posts
    5,825

    Default Re: Dishwasher on GFCI

    In the OP it stated the GFCI did not trip. If the GFCI did not trip it is not the cause of the problem. Most likely problem is with the electronic control for the DW.
    Jack
    Be sure you live your life, because you are a long time dead.-Scottish Proverb

  7. #7
    Join Date
    Aug 2007
    Posts
    7,159

    Default Re: Dishwasher on GFCI

    Quote Originally Posted by JLMCDANIEL View Post
    In the OP it stated the GFCI did not trip. If the GFCI did not trip it is not the cause of the problem. Most likely problem is with the electronic control for the DW.
    Jack
    Could also be a loose connection at the dishwasher. When the wash cycle changes or the motor kicks in it may provide just enough of a shake to interrupt the electronic controls of the DW. I've been surprised how many electrical problems I've solved by cleaning or restoring fouled connections.
    I suffer from CDO ... Its like OCD, but in alphabetical order, LIKE IT SHOULD BE!!!

  8. #8

    Default Re: Dishwasher on GFCI

    Quote Originally Posted by Timothy Miller View Post
    Howdy i have not heard of why one would have a GFI on the dishwasher an or disposal circuit. Might consider replacing it with a non gfi circuit breaker. Code now requires both of these appliances to be on their own dedicated circuits. The reason is the start up of the motors may overload a single breaker if both start at same time. Do you have any other loads on this circuit?
    What code? The 2008 code just says at least two 20AMP small aplliance branch circuits and with them being of the GFCI protected. The light circuit is seperate. The only execption the code has is the refridgerator can have it's own circuit. As far as moving the GFCI down the circuit, that's against code because the whole circuit wouldn't be GFCI protected. What you can do is take the dishwasher and the disposal off that circuit and place them on the same circuit, but sperate from the other 2 circuits. I would still have to be 20AMP and also GFCI proctected since it will be in the kitchen.

    Source: NEC 2008 edition code Article 210.52.B.1 exception Number 2. also Article 210.52.B.3

  9. #9

    Default Re: Dishwasher on GFCI

    [QUOTE=deadshort;181018]
    Quote Originally Posted by electricianhelper View Post
    It would still have to be 20AMP and also GFCI proctected since it will be in the kitchen.

    Says who?
    The NEC book!

  10. #10
    Join Date
    Jun 2007
    Location
    Fayette County, Ohio
    Posts
    5,825

    Default Re: Dishwasher on GFCI

    Quote Originally Posted by electricianhelper View Post
    What code? The 2008 code just says at least two 20AMP small aplliance branch circuits and with them being of the GFCI protected. The light circuit is seperate. The only execption the code has is the refridgerator can have it's own circuit. As far as moving the GFCI down the circuit, that's against code because the whole circuit wouldn't be GFCI protected. What you can do is take the dishwasher and the disposal off that circuit and place them on the same circuit, but sperate from the other 2 circuits. I would still have to be 20AMP and also GFCI proctected since it will be in the kitchen.

    Source: NEC 2008 edition code Article 210.52.B.1 exception Number 2. also Article 210.52.B.3
    Might I suggest you read the code. A dishwasher is not a small appliance and is not served by a small appliance outlet. There is no requirement that a dishwasher be protected by a GFCI, and GFCI can be installed down stream from other circuits and only protect that outlet and any outlet wired to the load side. You can also connect to the power side of a GFCI and supply non protected circuit. Not all outlets in a kitchen have to be GFCI protected.
    Jack
    Be sure you live your life, because you are a long time dead.-Scottish Proverb

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