I live in an older home that has one 20 Amp fuse connected to 12-2 wire running a fridge, and 2 electrical outlets. The frige says it takes 2.4 amps. I would like to install a diswasher on the same circuit, because it would be too messy to try and run a wire back to the circuit panel. Does this circuit have the ability to run the fridge, an 8.6 amp dishwasher, and possibly a portable microwave (amperage unknown, but a small one) without tripping the circuit breaker? I have heard current code requires all kitchen appliances to be on their own circut, however, for theoritical purposes I am trying to gain an understanding of what the 20 amp circut is capable of running?
Quickly and simplified reply: What you propose is a NEC violation A 20 amp circuit should not be "loaded" over 80% or 16 amps. A refrig has a larger "starting" current. A dishwasher has a "starting" current also.
If as you say, installing another line" will be "messy"; consider a professional opinion, and hire a qualified licensed electrical contractor. (Most of us do not leave a "mess".
Re: Hooking up multiple appliances!#22228 02/21/0310:16 AM02/21/0310:16 AM
2.4A @ 120V = 288VA. Unless it's a huge or ancient fridge it won't be running all the time. Therefore, the average load should be much lower than 2.4A
Does this circuit have the ability to run the fridge, an 8.6 amp dishwasher, and possibly a portable microwave (amperage unknown, but a small one) without tripping the circuit breaker?
2.4 + 8.6 = 11A, which leaves 9A. This means that the microwave must draw 9A*120V = 1080VA or less. The small microwave I have draws 500W, so yes, it should work. All under the assumption that you won't be using the appliances 24 hours/day.
Re: Hooking up multiple appliances!#22230 02/21/0312:22 PM02/21/0312:22 PM
QQ: Living in an older house myself, I tend to err on the side of safety. If the circuit is protected by a 20a fuse (which seems to date this electric installation), I would not feel good about even loading it to 80%. At the very least, I would put the microwave on a dedicated circuit. While your electrician is installing the circuit, ask him to evaluate the condition of the existing circuit and receptacles. Since he is in the walls, ceilings, etc., he might be able to install two circuits as easily as one (and replace the existing 12-2 with 12-2/Ground).
Just my thoughts...
[This message has been edited by mamills (edited 02-21-2003).]
Re: Hooking up multiple appliances!#22231 02/21/0305:52 PM02/21/0305:52 PM
I guarantee a house fire would be FAR messier than running a new circuit. Please don't let the messiness of the job be the deciding factor. Safety (the basis of codes) should be the decision maker. Run a new circuit for the dishwasher and sleep better at night.
Re: Hooking up multiple appliances!#22232 02/21/0309:53 PM02/21/0309:53 PM
If current code requires a separate circuit for every kitchen appliance, then that means you'd need a circuit (socket) for the toaster, one for the electric tea kettle or coffee percolator, one for the Frigidaire, one for the blender, one for the ferocious-looking electric hot dog cooker ( ), etc. And don't forget one for the radio (the most important kitchen appliance in my book!).
That would make for a lot of outlets and a big fuse/breaker box, wouldn't it....not to mention a mess of wires behind the wall....
I've never seen a kitchen with more than three duplex sockets (not counting the one used for the Frigidaire).
One in particular has one 20 amp receptacle circuit with a duplex socket and the other one is a 15 amp with two duplex receptacles.
Re: Hooking up multiple appliances!#22234 02/22/0308:06 AM02/22/0308:06 AM