Can I connect a dishwasher and an outdoor outlet on the same circuit?


The 2014 NEC now requires the dishwasher to be on GFCI.

The 2014 NEC does not require the dishwasher to be on an individual circuit (it never has). So, you could feed either receptacle on the load side of the other with a GFCI. Or you could put the whole circuit on a GFCI breaker.

If your locality is still on the 2011 NEC the GFCI requirement was not in there for the dishwasher then but it was for the outside receptacle. So, as Isherwood points out, you could feed the outside from the DW receptacle as long as it is a GFCI receptacle.

Additionally, all residential receptacles have to be tamper resistant. Outdoor receptacles have to be TR and weather resistant with an in-use cover that is rated "extra duty".

Gets complicated eh?


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It's time to update your kitchen with a new dishwasher! Before you shove it into the cabinet opening, there are a few things you'll have to prepare. For starters, a dishwasher needs its own dedicated circuit run from the electrical service panel (breaker box). It also needs a source of hot water and a drain to connect to. Dishwashers require a 24" cabinet opening. Try placing the dishwasher next to the sink for convenience.

This means the water and drain lines can be short and easy to install.

Installing the Electrical Circuit

The first step is to install a 20-amp circuit from the electrical service panel, if one is not already installed. To add a circuit cable, drill a hole down through the floor into the basement or crawlspace. Then, install 12 AWG cable from the dishwasher space to the service panel. Leave about 6 feet of cable sticking through the hole by the dishwasher. This will allow the dishwasher to be pulled out during servicing. Tape the wire to...

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There was a wrong interpretation of 210.23.A.1 posted, saying that it requires max 80% rated ampacity load on individual branch circuits, or even 50%, etc. That's not the case if you have individual branch circuits. The 210.23 subparts (A, etc) only apply on NON-individual circuits! If you have an individual branch circuit, then it can supply full rated load:

210.23 In no case shall the load exceed the branch-circuit ampere rating. An individual branch circuit shall be permitted to supply any load for which it is rated. A branch circuit supplying two or more outlets or receptacles shall supply only the loads specified according to its size as specified in 210.23(A) through (D) and as summarized in 210.24 and Table 210.24.

Really when you have an individual branch circuit, things are very simple. For example, 210.21(B)2 and 3 don't apply. The 210.21(1) states:

(1) Single Receptacle on an Individual Branch Circuit.
A single receptacle installed on an individual...

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And let us not forget a GFCI.

Nope, not standard procedure, a code requirement, or even a good idea. Since there is no need for it in this application, and typically (assuming that you are referring to an outlet and not a breaker) the outlet would be located under the sink base, it would also create troubleshooting issues in the future. GFCIs are somewhat failure prone, and I doubt most folks would even think to look for one there before making a call to the appliance repair guy when the dishwasher quits.

As a safety measure, when I do install dishwashers with a plug in cord, I always use a single outlet under the sink, as opposed to a standard duplex, which would leave a non-GFCI spare place to plug in to. I have no idea why anybody would want to plug in there, but I like to eliminate the...

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This is the preferred method of wiring a half hot switched outlet. If power is coming from the switch it is most likely a lighting circuit, intended to operate lights, not outlets. Yes, you will probably have a lamp plugged in, and yes that is a light, but the other half of the outlet could run anything. Best if this outlet is on a circuit intended for outlets, so if there is an option use the power already in the outlet box.

Whether you are installing a completely new outlet or replacing an existing one, the box will contain one or more 2 wire cables with a black, white and ground in addition to the 3 wire cable you have added. Cut a short, 6" piece of additional cable and remove the outer sheath. Splice all of the grounds together, with an additional 6" piece to go to the outlet. Splice all the black wires together with an additional 6" piece of black wire. Splice all the white wires together, again with a 6" additional piece.

Splicing is accomplished by stripping...

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Whether you’re putting in all new appliances or simply replacing a worn-out machine, installing a dishwasher yourself is a DIY project that’s not that difficult and can save you a hefty installation fee.

Preparations for Dishwasher Installation

The first step is making sure the machine will fit in the opening. Most standard dishwashers require a 24” opening. If you’re installing new cabinets, it’s important to consider the width of the dishwasher ahead of time. The height of most machines is adjustable within certain limits, but check to be sure the dishwasher you plan on purchasing will fit your opening before buying.

Depending on your cabinet configuration, you may need to drill one or more holes to run supply lines, electrical wiring, and the drainpipe through. Hole saws make quick work of drilling larger diameter holes.

Remove the faceplate at the base of the machine to access the supply line inlet and electrical box. It’s a...

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Upgrading Outlet Electrical Wiring

William, from Winnipeg, MB, Canada asks: Hi I'm doing electrical in home which is over 100 years old. I was wondering if I can use the current 2-wire cable that is connected to two-prong outlets to supply power to new grounded outlets.

Dave's Reply: William, No - you should not use the existing 2-wire cable to connect to grounded outlets, unless there is an external or separate ground wire that is available at the outlet box. it is best to replace the old 2-wire un-grounded cable with new 3-wire cable which has the ground wire. The new electrical cable should be installed starting at the electrical panel where the ground wire may be bonded to the main ground terminal or system.

Outdoor Outlet

Alan asks: I'm installing an outdoor outlet. It's one that has a pole stuck into the ground. The question I'm getting is how deep into the ground does the pole have to be to meet code. The last person did a really bad job and...

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On this page you will find answers to questions most frequently asked by our customers. These questions are intended to be a resource for you regarding your electrical system. These questions are not intended to be a “troubleshooting guide” for electrical problems in your home. If you become injured or your property is damaged as a result of your own electrical work, Root Electric will not be held responsible. You should always contact a licensed electrician to perform electrical repairs or make modifications to your electrical system.

What is a “short” or a “short circuit”?

A “short” and “short circuit” describe the same problem. A short circuit happens when the “hot” wire (the wire carrying the electrical current, most commonly the “black” wire) comes into contact with either the grounded conductor (also called the neutral, most commonly the “white” wire) or the equipment ground (the “bare copper” wire or “green” wire). When a short circuit occurs, excessive heat...

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Hi Andy and Dave,

On the strength of what I have read on here and Daves experience I have put the crappy Tecnik on Hot fill only. Well the first thing I can say is it is not such a crappy Tecnik after all! It now does a pre-wash in hot water instead of cold, so there are no more grease blockages forming, the dishes are coming out spotless and the machine (now 4 years old or so) smells fresh. It has a regular monthly cleaning with Finish dishwasher cleaner, but still smelt, now on Hot fill the food is broken down from the off so nothing can vegitate inside the machine.

As it is an economy version of a Bosch there is no intensive wash cycle, just a “Normal 65oC” and “Economy Wash 50oC”. and the “Pre Rinse only”. None of these use the heater in the pre wash, so it was cold, all the grease built up inside the machine and made it smell, and as the soiling was not being softened by a warm prewash, it used to get baked on by the hot main wash. Not any more, our hot water is...

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Electrical Wiring- Plugs Not Working

After I changed the switches and plates on most of the switches in my bedroom, some of the plugs won't work, including plugs that I didn't touch. I checked the circuit breakers and they are not tripped. Also ,this doesn't affect every electrical outlet on the same circuit and also affects circuits that weren't involved. Any info. would be most helpful. By the way, all these plugs worked before.

Ok.. start at the beginning and retrace your steps. With the breakers open of course.. check the wiring in each outlet and switch you worked on. Somewhere there was a power feeder wire to other switches or outlets that didn't get wired back up right. If everything is attached and the are no wires without a connection, you will need to carefully trace out the flow of the wiring. Something wasn't put back the same way. So you will need to find the hot lead that feeds the rest of your circuits and get it reconnected to a hot.....

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Overview: A simple wiring technique

Most homes have only two exterior outlets—one in the front and one in the back. That may be OK most of the year, but it's a real hassle when you're hanging holiday lights. It can be dangerous, too: Overloading cords or outlets poses a fire hazard, while crisscrossing your driveway and sidewalk with cords creates tripping hazards.

In just a few hours, you can solve these problems forever by adding an outlet or two. In this story, we'll show you how to do just that. We've made adding an outlet as easy as possible—simply connect new wire to an existing interior outlet and install your new outlet on the opposite side of the wall. This eliminates the arduous task of fishing wires through finished rooms. To bypass the hassles of cutting a boxed-size hole in the exterior wall, mount the new outlet right to the siding.

Even if you've never worked with electricity before, you can do this. Our Web site covers all of the basic skills...

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What are the basic residential wiring circuits? Can you put the hall plug on the same breaker as the dining room? How many switches have to be in the stairwell? What size wire do you use for a dryer? How many amps can 12-2-WG take? All of these questions are answered somewhere in the 700 (more or less) pages of the National Electric Code. Luckily many of the most common residential wiring questions are answered right here on just a couple of pages. This is not intended to replace the NEC or the necessity to become familiar with the NEC. If you spot anything in this that you think is incorrect, please contact me at

Required Elements

Service Equipment
Required Receptacles - Code Summary
Required Light Fixtures - Code Summary
Required Ground Fault Protection
Required Arc Fault - AFCI - Protection
Kitchen Receptacles - Code Summary
Smoke Detectors - Code Summary
Appliance Branch Circuits - Code SummaryRough in...
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Hi everyone.

I have a washing machine already plumbed in and would like to get a dishwasher too.
I am planning/hoping to put the dishwasher next to the sink where the existing pipes are and then the washing machine will have to be placed about 4 meters away. I would really appreciate some advice and if anyone would be kind enough to answer the following questions for me:

Please can someone tell me if this is possible?

Would it be a problem having the washing machine so far from the pipes or can I simply
buy longer hoses and run them under the kitchen cupboards?

Would I be able to use both machines at the same time or would I have to use them at different times?

Thanks in advance...

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Electrical wiring means insulated conductors which are used to carry electricity. Connecting cords for appliances, circuit connections, device connections, and electrical panel connections require some type of wiring connection. The following are some of the frequently answered questions by Experts.

I am in the process of electrically wiring a food truck . Please tell me what I need to do for a breaker box as this will need hooking up to the 220 outlet on the generator (8000 watts) . The main breaker box will need to be connected to smaller ones that will run the various appliances like a small electric oven , micro-wave , toaster , coffee maker , hood fan , refrigerator and lights . Please tell me how to distribute the various load requirements and the size of wiring for the smaller breakers. Does the use of the 220 outlet eliminate the need to use the 110 outlets on the generator?

Since you are feeding it with a 30 amp service, use 15 amp breakers and try 12...

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My old microwave died and tripped the breaker. I bought a new microwave and now every time I start it the breaker trips. I exchanged that microwave for another new one, same thing. I have had our maintenance guy out to look at it and he can't figure it out. The crock-pot still works. Any ideas?

By jtowery from Jacksonville, NC

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December 7, 20100 found this helpful

Sounds like the old microwave must have operated at a lower wattage than the new one, or the circuit is overloaded. You may need to add another breaker.

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Question: Microwave Randomly Trips Circuit Breaker

May 25, 20110 found this helpful

The microwave in our kitchen trips the...

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The circuit breakers in the electrical panel in your house are safety devices. Each one is designed to disconnect power when the current passing through the circuit exceeds its rating. This prevents overheated wires, electrical power surges and fires. Electrical outlets don't draw power until you plug something in, so a 20-amp circuit should theoretically be able to handle as many outlets as you want without overloading the breaker. There are practical limits, though.

Allowable Breaker Load

The National Electrical Code doesn't limit the number of receptacles you can place on a 20-amp circuit, but you'll overload the breaker if you run appliances that draw more current than the breaker can handle. The NEC does specify that a circuit breaker shouldn't handle more than 80 percent of the load for which it is rated unless the breaker is labeled otherwise. By this standard, the total current draw on a 20-amp circuit shouldn't exceed 16 amps. This allows the breaker to...

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Q: I live in a 1940s house with a kitchen that has never been updated. I’m tired of doing the dishes by hand and would really like to get a dishwasher. I don’t have a garbage disposal and don’t really want or need one. I compost all my organic food waste.

Is it possible to get a dishwasher or am I doomed to continue with washing dishes by hand. Do I have to spend big bucks to have the kitchen remodeled? I’m pretty handy so if possible I’d like to do this myself using the existing kitchen cabinets.

The counters are 25 inches deep with tile countertops, and the counter height is 35 inches. There are two side-by-side banks of drawers to one side of the sink measuring 26 inches between the stiles. This seems to be a perfect place for a dishwasher. What do you think?

A: Yes, you can have a dishwasher in your kitchen. Furthermore, you can do most of the work yourself and save a bunch of money. Four things are necessary for a built-in dishwasher: a place for it; a...

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I'm trying to solve an issue at my brothers house. He came home and the outlets around his kitchen had no power. I found the GFCI was tripped. I reset, but it trips instantly. I unplugged every device and it still trips. I bought a new GFCI, still trips.

Next I checked the load side hot to neutral with my meter. Infinity resistance (nothing pugged in). I checked to be sure I was getting 120 volts to the black wire and that it was connected to the line side of the GFCI.

Some other notes: If I bypass the GFCI, The circuit works (no short) With load side of GFCI not connected, it does not trip. If I touch the black load side wire to the hot load side of GFCI, no trip. If I touch the white load side wire to the to the neutral load side of the CFCI, it trips! (I'm confused on that one)

Bathroom has its own GFCI circuit that works and I can find no outside outlets on the dead circuit.

I'm puzzled on this one. Any ideas?

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SD-9241SS-Stainless Steel SD-9 W-White Dishwasher Features.......1 Safety Instructions........2 Grounding Instructions Electrical Connection Proper Use Parts...

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