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pdkaman
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?

pdkaman
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.

Timothy Miller
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?

Ernie_Fergler
Re: Dishwasher on GFCI
Timothy Miller wrote:

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}.

Timothy Miller
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.

JLMCDANIEL
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

A. Spruce
Re: Dishwasher on GFCI
JLMCDANIEL wrote:

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.

Ernie_Fergler
Re: Dishwasher on GFCI
A. Spruce wrote:

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.

Boy, does that ring a bell. I do remember a homeowner having a problem with a DW on a dedicated circuit. The connection in that way to small box on the DW unit had a rather poorly made up pigtail involving the stranded wire & the 12 AWG copper. Redoing the twist has solved the problem for about three years now, and many more to come.:D

canuk
Re: Dishwasher on GFCI

yep --- look at the dishwasher.

A. Spruce
Re: Dishwasher on GFCI
canuk wrote:

yep --- look at the dishwasher.

Yup! It's a dishwasher. Now what? :p;)

canuk
Re: Dishwasher on GFCI
A. Spruce wrote:

Yup! It's a dishwasher. Now what? :p;)

Uhm --- use it to was dishes ?? :p:D

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