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Old 07-08-2012, 11:24 AM   #1
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garbage disposal and dishwasher sharing circuit


To know if it is legal you would need to know the amp draw on both appliances.

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Old 07-08-2012, 11:30 AM   #2
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Well the GD draw is variablevariable, you can trip it if you try to stuff an elephant into it.

But don't try this at home.

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Old 07-08-2012, 11:34 AM   #3
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garbage disposal and dishwasher sharing circuit


The disposal will have a rating.
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Old 07-08-2012, 11:51 AM   #4
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99% of the time this it is fine on a 20A circuit. Neither is a continuous load.
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Answers based on the 2008 & 2011 NEC.
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Old 07-08-2012, 11:54 AM   #5
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99% of the time this it is fine on a 20A circuit. Neither is a continuous load.
No, but 210.23 (A)(2) usually comes into play. A dishwasher can easily draw 11 amps.
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Old 07-08-2012, 12:23 PM   #6
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No, but 210.23 (A)(2) usually comes into play. A dishwasher can easily draw 11 amps.
And a disposal runs 5-10 seconds at a time.
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Old 07-08-2012, 12:28 PM   #7
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And a disposal runs 5-10 seconds at a time.

I disagree, I see people leave them on for minutes... and it really doesn't matter what time frame they leave an appliance on for.


I will agree with you that "yes" it probably will work, will it meet code is the other pesky issue we have at hand.

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Old 07-08-2012, 12:31 PM   #8
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I disagree, I see people leave them on for minutes... and it really doesn't matter what time frame they leave an appliance on for.
if someone is stupid enough to leave a GD on for minutes, they deserve to have their breaker trip.
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Old 07-08-2012, 12:33 PM   #9
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if someone is stupid enough to leave a GD on for minutes, they deserve to have their breaker trip.
stupid? yeah, because wiring something how someone thinks it should run should be the correct installation.
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Old 07-08-2012, 12:35 PM   #10
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You asked us for the answer. It doesn't matter how long you run the disposal for...if either one of these appliances are rated for more than 10 amps, they cannot legally be on the same circuit.

Some of these appliances require separate circuits in their instructions.
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Old 07-08-2012, 12:35 PM   #11
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if someone is stupid enough to leave a GD on for minutes, they deserve to have their breaker trip.
You asked if it was code, I think i pretty much summed it up for you, why you asked is beyond me since you already know how you are wiring it.
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Old 07-08-2012, 12:40 PM   #12
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yeah but what are power outlets rated for ? they are not. you can plug a 16A appliance into a 15A outlet. which brings my question why the code makes demands for more predictable appliances and not for power outlets, it looks like an easy victim.

i am just asking for a rationalization of the code, that is all.
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Old 07-08-2012, 12:43 PM   #13
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garbage disposal and dishwasher sharing circuit


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yeah but what are power outlets rated for ? they are not. you can plug a 16A appliance into a 15A outlet. which brings my question why the code makes demands for more predictable appliances and not for power outlets, it looks like an easy victim.

i am just asking for a rationalization of the code, that is all.
A 16 amp cord and plug appliance will come with a 20 amp cord cap. 12 amps is the maximum cord and plug appliance with a 15 amp cord cap.

Table 210.21(B)(2)

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Old 07-08-2012, 12:51 PM   #14
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garbage disposal and dishwasher sharing circuit


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yeah but what are power outlets rated for ? they are not. you can plug a 16A appliance into a 15A outlet. which brings my question why the code makes demands for more predictable appliances and not for power outlets, it looks like an easy victim.

i am just asking for a rationalization of the code, that is all.
Im really not sure what you are trying to ask?
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Old 07-08-2012, 01:26 PM   #15
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garbage disposal and dishwasher sharing circuit


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Im really not sure what you are trying to ask?
if you can't regulate by code what you can plug into an outlet (how many amps, that is) why is the code being nit-picky about a very nominal rating of an appliance like disposal that can maybe draw 10A once in a blue moon but most of the time will be 1-2A?

i have a MIlwaukee circular saw that is rated for 7A ... JUST TO ILLUSTRATE HOW MEANINGLESS THIS RATING IS: it all depends what you are running it against. if you put a diamond blade and try to cut some concrete with it, it will start sucking more than 15A. and is rated for 7. i have tripped the breaker this way numerous times.

i think switching the DW from the overloaded circuit to mooch off of the GD circuit will cause fewer trippings than currently

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