Question about Maytag MMV4205 Microwave Oven
A six-bedroom house is being converted to a boarding house. Tenants will probably want to have micro wave ovens in their rooms but multiple bedrooms are on one circuit leading to a possible overload.
Please stick with me to the end ... some examples are for example only. There is no 1000 watt circuit per'ci.
This will not be possible overload, this is an accident waiting to jump on you, my friend
Install dedicated circuits for these ovens, my friend. It will cost you a little but will be better than having dissatisfied guests or talking to the zoning board or boarding house authority or (gasp) the fire inspector after the fire.
If you don't do this, when the breakers start flipping off, tenants will run extension cords to outlets that have power. A whole different and worse, problem!
Rule of thumb, lighting circuits should be designed to operate at 80%, for example, if you have 800 watts of lights on a 1000 watt circuit, you are at the max.
So, there is a possibility that your circuit for lights is already near max. Adding ovens is trouble. Don't forget the iPOds and cell phone chargers as well as lap top chargers, walkman chargers (older students), little TV's, DVD players, clock radio's, electric shavers, curling irons, steamers, popcorn makers, lava lamps and occasional electric heaters that will be snuck into the room.
What is a 1000 watt circuit ... good question. Ohms law comes into play here.
Volts X Amps = Watts
120 volts X 8.333 amps = 500 watts (a smoothie blender) 300 watts (slow cooker) 200 watts (hand mixer) = 1000 watts.
A 15 amp circuit will protect #14 wire and can carry about 1800 watts (a toaster (1500 watts), for example).
A 20 amp circuit will protect #12 wire and can carry about 2400 watts (i am using a big paint brush here. these numbers are pretty close but not exact and I am not a licensed electrician.)
When I wire, I aim lots lower, preferring to OVER build than to under build.
10 amp circuits are rare in modern homes. In general practice, if the need was to be protected at 10 amps, the wire used in the circuit would be #14 and it would be protected by the breaker at 10 amps. In this case, it is the device plugged into this 10 amp circuit that needs protection rather than the #14 wire (which would be technically oversized)
Another consideration for you is where is the water? If you have an outlet that is 5 feet from a water source (bath - kitchen - etc) it must be protected by a GFIC
A 30 amp circut will protect #10 wire --- but this is not a normal household circuit.
Maybe the best option is for you to have your electrician install a sub panel in the vicinity of use and run several 20 amp circuits from that location to the various rooms.
The answer to your question "How many (1150 watt)micro wave ovens will a 20 (amp circuit handle)" is TWO with nothing else on the line. The National Code requires dedicated circuits for micro wave ovens, BTW. A commercial application may have a different (more stringent) standard in your town.
Thanks for the opportunity to answer your question and thanks for your interest in FixYa.com
Please vote - positive comments appreciated by volunteer question catchers.
Posted on Dec 13, 2009
Each microwave will tell you (probably on the back near the serial number the amount of amps each will use. If not divide the number of watts by 115(volts) or 230(volts) depending on which voltage the appliance uses. The answer will be the number of amps used by the device.If volt * amp = watts perhaps you can take the wattage of a microwave and divide by your voltage at home (120 in North America) to get amps.
Posted on Dec 13, 2009
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
Tips for a great answer:
Mar 03, 2015 | LG Microwave Ovens
Either you have defected (weak) circuit breaker and wiring or bad Microwave oven.
The 99.99 % house hold Microwave ovens pull less than 15 Amps. They may have internal ceramic 15A fuse or 15 Amp internal circuit breaker.
To isolate your problem:
Plug your Microwave oven to different areas (different electrical circuit) if the different circuit breaker still trips... your Microwave oven has a short - Most of them has a small ceramic fuse 15 amps fuse.-also check some inter lock switches at door .
If the Microwave oven works Ok then you may have:
2a. You may overload the existing electrical circuit, try to unplug some other appliances
2b. You may have bad electrical outlet receptacle (Replace it with the same type , - may need helps from licensed electrician)
2c. Weak or defect house hold circuit breaker. (Replace it with the same type , brand - may need helps from licensed electrician)
Jan 24, 2014 | Goldstar Microwave Ovens
Jan 01, 2013 | Magic Chef MCO160UB Microwave Oven
Dec 15, 2017 | Whirlpool WMH2175XVS Stainless Steel 1000...
Aug 22, 2011 | Microwave Ovens
Aug 03, 2011 | Panasonic Microwave Ovens
Aug 05, 2010 | General Electric Microwave Oven
Sep 07, 2009 | Maytag MMV5186A Microwave Oven
Sep 11, 2008 | Microwave Ovens
Jul 09, 2008 | Sharp R-220HW Microwave Oven
391 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: