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Old 02-22-2011, 10:49 AM   #1
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How many switches, outlets, lights are allowed on a 20amp circuit?

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Old 02-22-2011, 10:59 AM   #2
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Kitchens are not quite that simple (which you may know). You need several circuits. At least two 20-amp branch circuits are required to feed receptacle outlets for small appliance loads. Those circuits can't supply anything else. You also can't share a load with a built-in appliance and the countertop outlets. So, you'll need a separate circuit for your lights, built-in appliances (dishwasher, disposal, etc), 2 outlet circuits, and possibly more.

I am not an electrician, but have read quite a bit. I was referencing a guide I have - which may or may not be the most current. I expect a real electrician will be by soon to amend what I stated.

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Old 02-22-2011, 12:40 PM   #3
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hyunelan2 is correct in the essentials. what are you doing that we may give more relevant advice?



however strickly speaking number of anything on a circuit is not a code issue but a design issue. In short there is no limit to the number(100+) of plugs i could put on a circuit, however not a good idea.
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Old 02-22-2011, 02:38 PM   #4
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The kitchen has just one 20amp for the counter outlets, Not enough, I know. I am adding a second one.
I have a seperate circuit for the ceiling lights which I am expanding form 4 to 8.
I am adding a 20 amp for above cabinet, below cabinet and below toe kick totaling 13 outlets on 3 seperate switches. This is the one I'm concerned about overloading.
I looks as though I need to add yet another 15 or 20 for the microwave alone.
Thanks for the advice
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Old 02-22-2011, 03:58 PM   #5
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AFAIK, the switches of the circuit in question don't matter. You could put in 52 switches to turn on a single light bulb if you wanted. All 13 of those outlets are just for the cabinet and toe-kick lighting? Is it possible to use less outlets and just use longer low-voltage wiring?

From a code standpoint though, I don't see anything wrong with 13 outlets on a 20a circuit. That would allow you to pull 180w per outlet before you max out the line, and I doubt your cabinet lighting is that intense. Still, I think you might be better-off reexamining your lighting situation and combining several of those. I know the 4 under-cabinet halogen lights I have in my office plug into a single receptacle - are you counting an outlet per light? It just seems like a lot.
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Old 02-28-2011, 11:35 PM   #6
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Does anyone know if it's possible to have a dimmer switch(s) on a 3-way?
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Old 03-01-2011, 12:21 AM   #7
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yes replace one 3 way switch with a 3 way dimmer
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Old 03-01-2011, 05:42 AM   #8
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True. If what you are interested in is the ability to dim from both locations of the 3-way you will need to go with digital dimmers. A style like the Lutron Maestro works well. When you do a 3-way in digital just be aware that you need one main (master) dimmer and one accessory dimmer. You can't use two main dimmers, an you wouldn't want to because the main dimmer is more expensive than the accessory.
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Old 03-01-2011, 08:51 PM   #9
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Are you putting lighting in the toekick? That is the first I have heard of this. I will have to read up on toekick lighting. I suspect that it must be low voltage. You definately do not want to put a 120 volt recepticle in the toekick space. That is way too close to the floor which gets wet occasionally.
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Old 03-01-2011, 10:43 PM   #10
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Quote:
Originally Posted by brettwier View Post
How many switches, outlets, lights are allowed on a 20amp circuit?
Where are you located ?
Canada restricts the number, in the US its based on possible load for light fixtures, no limit for outlets

20a = 2400w

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