(on a 15 or 20 amp circuit). This is sort of similar to the other thread, but my problem is the house I bought is wired with 12, all the breakers are 20AMP except for the 30AMP for the AC and Dryer. A 15-amp circuit is usually served by 14 gauge wire, while a 20-amp circuit must be served by12-guage wire. Personally, I would just go ahead and install the right circuit for the machine, with the correct plug and wiring, etc. After calling the electrician to explain the problem, the electrician said he will upgrade the breaker to 30 amps? Why (Some) Microwaves Require a 20-Amp Circuit. Thanks, I do understand a lot about the trade, obviously not as much as a journeyperson. NEMA 6-20 outlet on a 30 amp circuit. If you were to run a 20 amp receptacle off a 30 amp circuit, the breaker would allow 30 amps before tripping, which is more than the receptacle is made for, and can cause short circuits and fires, so this is not to be done! It seems like the only problem would be that the circuit breaker would not trip in the event that the oven for some reason pulled in more amperage than it should. The builder of our condo did a lot of stupid things but one of the more idiotic was wiring the circuit for our drier in this way (NEMA 6-20 receptacle on a 30A circuit). actually, there is a difference between a 15 amp and 20 amp outlet and it has nothing to do with the wiring, it is what the internal parts of the receptacle can handle. By this standard, the total current draw on a 20-amp circuit shouldn't exceed 16 amps. The wiring was hopefully matched to your circuit breakers when it was installed. I've had an old boiler removed … JavaScript is disabled. I was told I would also need a junction box installed and circuit upgrades. What amp breaker should I use for a 20 Amp electrical oven and a 40 Amp range? I have a few questions that I need help on. On a standard C type 20A breaker will only instantly trip at about 100A. I'm replacing appliances in my kitchen, and there's currently a 30 amp, 240V, 3-wire + ground feed to the location where the oven is located, on a 30 amp, double pole breaker. The instructions do state that the oven draws 15.4 amps. I have a question regarding putting a 20 amp outlet on a 30 amp circuit. The original #6 would also indicate a larger original Amp installation. I'm planning to install an electric oven (240V) and a microwave oven (120V). I'm replacing appliances in my kitchen, and there's currently a 30 amp, 240V, 3-wire + ground feed to the location where the oven is located, on a 30 amp, double pole breaker. Your 20 amp breaker doesn't have a big enough wire to support a 30 amp breaker. Is there a resource out there, prefereably on the web, that outlines the compatibilities between awg wiring, the breaker amp size, outlet amp size, how many recepticles/outlets can be on x amp outlet, etc? The thicker gauge required by 20-amp circuits ensures the wires do not overheat under a 20-amp load. This breaker is probably 24 years old and should just be replaced with a new 20 amp … But, in terms of physics larger wire will not change anything. Depending on the skill and confidence working on electrical projects we may be able to walk you through the process of converting the circuit. Yes of course. Any help would be greatly appreciated. Most household electrical receptacles have a 15-amp rating, but they connect to a 20-amp circuit. I think i would feel safer running both on a 30 amp breaker (again each on its own). They should have covered the basics in the first term. A 20 amp circuit requires a number 12 wire while a 30 amp breaker requires a number 10 wire based on the national electric code. Oven that came with the house when new 22 years ago has dedicated circuit with 20 amp breaker. The 10 awg cable usually has an outer orange Jacket. If you do it incorrectly you will ruin your dryer. You CAN NOT simply change the receptacle or plug on the dryer. 30-50A is more typical depending on size, etc. You can draw 40 amp for about a minute. They also state that the specific model oven should be on a 20 amp breaker so I'm assuming thats why he put in a 20 amp breaker. I was wondering if it would be okay to use 10/2 wire on branch circuits in my house? The wife wants to replace it with two single ovens, each rated 3.6 kW - 16A. I'm guessing it's a simple enough job to hard wire the two new 16A ovens to the existing 32A supply - … Microwaves require a 20-amp branch circuit due to constant load and spike issues. For a better experience, please enable JavaScript in your browser before proceeding. All current electric ranges require at least a 40 amp circuit and some (like the one you bought) spec a 50 amp circuit. Same for 240VAC outlet. How many lights would you say you can run on 12-2 and/or 14-2 wire? A plug is an object located on one end of a power cord that connects an electrical device to a receptacle. His electrician installed a 20amp 2pole breaker. Re: 40 amp range, 30 amp circut [ … I recently moved into my home and discovered a few things. Your 20 amp breaker doesn't have a big enough wire to support a 30 amp breaker. For a kitchen remodel I am replacing a range which is wired with a 50 Amp circuit an 6 AWG AL wire with a cooktop calling for a 30 Amp circuit and 20 Amp oven which will be installed below the cooktop. Hob is listed at 3.68kw Oven at 6.8kw or 5.7kw depending on if you go by the manual or manufacturers website! 20 amp or 30 amp. It is there to protect the cable over heating and avoid your house catching fire. Replacement ovens seem to all require 40 amps. The oven draws 15 amps or so and its not heating up. 1. And 30 amp for about 5 minutes. Thats it, Unless the breaker is tripping, replacing it with a larger size breaker isn't going to do anything. If the oven is not heating up, something else is wrong. 30 amps needs 10 ga wire, and a 30 amp plug, 20 amps needs 12 ga wire and a 20 amp plug. Just to clarify, "20 amp outlet on a 30 amp circuit" your outlet isn't amp rated, the wire and the breaker consistute the max amperage of the circuit. … So there are outlets rated for 20 amps. The wall oven could be put on 500MCM, still will not change anything. Now why he used #10 Im not sure about that. So the top is gas and the oven is electric, am I deciphering that right? September 21 in Model 3. It looks like both may be rated for 20 amp breaker (each on its own dedicated circuit). But if the oven draws 15 amps will this ruin the oven? An oven is a continuous load since it can pull its full rated power for an indeterminate time. It's a code violation not to install the range according to the manufacturers directions. The standard wire size on a thirty amp breaker is #10. Crazy Horse dreamed and went into the world where there is nothing but the spirits of all things. Can you use a 15 amp outlet on a 20 AMP breaker with 12-2?? (the smaller the number the larger the wire). Changing out to 120 volts/20 Amp, requires a 20 amp breaker, receptacle, bigger wire on a smaller breaker is OK. Once upon a time, a long, long time ago in a galaxy far, far away, there were some "drop in" coil burner range models that were rated to run on a 30 amp circuit. Was this the Ikea oven that the guy posted about in the DIY forum? 20A would be awful low for an oven. I recently purchase a GE 30 inch single wall oven and 30 inch cooktop. The 40 amp cord is a bit of an anomaly, the GE WX9X35 is a cord that is specified as a 40 amp cord, it has a 50 amp prong configuration, with 40 amp wire. Actually, there is a difference between a 15 amp and 20 amp outlet and it has nothing to do with the wiring, it is what the internal parts of the receptacle can handle. This allows the breaker to handle the temporary surge that happens when an appliance such as a … Not that microwaves come with plugs fitting them. 2. And 25 amp for nearly an hour. Post reply Insert quotes… Or am I going to be forced to run another line to the breaker box specifically for the microwave? Would using a GFCI outlet instead of a standard one increase the safety of this installation? This breaker is probably 24 years old and should just be replaced with a new 20 amp … Some devices drawing more than the 12 amps a 15 amp circuit is derated to, use a different style plug rated for 20 amps and require a matching 20 amp outlet. We plug lower amperage devices into higher current outlets all the time like our cell phone chargers and 60W lamps into 120VAC 15Amp sockets. How... Hi. A forum community dedicated to professional electricians, contractors, and apprentices for residential and commercial work. You definitely need new wires for the microwave. You can certainly have a 20-amp breaker protecting #10 conductors and use 15 and 20 amp receptacles on the circuit (the 15 amp receptacles are OK providing it's a multi-outlet circuit). Reply to 32amp MCB and cable to 20 amp oven in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net. However, I feel like this may be too small. apparently. If you were to run a 20 amp receptacle off a 30 amp circuit, the breaker would allow 30 amps before tripping, which is more than the receptacle is made for, and can cause short circuits and fires, so this is not to be done! A 4-wire or 3-wire, single phase, 240 volt, 60 Hz., AC only electrical supply is required on a separate, 40-amp circuit, fused on both sides of the line. A 40 amp appliance needs #8 wire. I saw that the code allows these two to be wired on the same circuit, but has a description on how to wire it that I do not exactly understand. A 30 amp circuit cannot supply a single load of more than 24 amps. Currently, I have a 6 gauge wire and a 50 Amp breaker, and my current electrical cooktop and electrical oven are both hooked up to this. It is one indication of the size. You definitely need new wires for the microwave. The new range is a slide in and requires 40 amps. We have a 7.2kW rated double oven at the moment, hard wired to a supply protected by a 32 amp fuse. 1. The two 30's tied together is not a 60, it is a 240v 30 amp. Not any more. If there have been home owner improvements over the years this matching may be in doubt. Wire can handle the over, its good for 30amps. I have a colleague that just recently had a wall oven installed. The circuit breaker is 30 amps, house built in 1987. Back to the original question - per the NEC (210.21 is the section), you can only have 30-amp receptacles on a 30-amp circuit. There are a few areas I'm weak with probably because I dont review them as much as I should. Discussion in 'Electricians' Talk' started by kathekas, Jul 6, 2017. kathekas Member. A 20 amp circuit requires a number 12 wire while a 30 amp breaker requires a number 10 wire based on the national electric code. Hell, they should have gone over volts and amps in the first day/week. It's a code violation to install a 40 amp recpetacle on the 30 amp circuit. Leave the 240 as a dedicated line and pull new wire and circuit for the microwave. I have a question regarding putting a 20 amp outlet on a 30 amp circuit. well i know the recommend 20 amp min on gas stoves.. i err on the side of caution I'd say a bare min 32 amp circuit for stove/cooktop.. though i'd go the extra mile and allow 40amp for all electric system per cooktop and stove.. as I allow leeway for over current, power draw of device can be more than stated recommendations.. You can use a device that has a 15-amp plug with either a 15- or 20-amp receptacle. The instructions do state that the oven draws 15.4 amps. 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