Latest Discussions : Electrical & Lighting


10:02AM | 12/13/02
Member Since: 12/12/02
2 lifetime posts
Re:Goldstar, Model #MV1515
1.5 Cu. ft, 1000 watts
Over-the-range Microwave.
Please let me know how many amps it takes to install this over-the-range microwave with exterior/interior ventilation exhaust (fan).
Thank you.


07:35AM | 12/17/02
Member Since: 10/15/02
359 lifetime posts
Minimum 15 amps if it is by itself, if other appliances are on the same circuit, then 20 amps would be needed.


08:49AM | 12/17/02
Member Since: 12/12/02
2 lifetime posts
ok. How about if under cabinet lighting is on that same circuit. No other appliances though. You can see that I don't want to have electrical work done. So what you're saying is that the MW needs it's own circuit - or it can be with something else, just not an appliance - correct??
Thanks again!


01:26PM | 12/17/02
Member Since: 12/16/02
5 lifetime posts
Or-- Watts = Volts multiplied by the Amps

Your MW we know is 1000 watts. House voltage average 120, so ...

1000=120 x Amps--- isolate the amperage(divide each side by 120) and we get...

Amps = 8.3

If you add a light say 60 watt bulb redp equation with 1060 for wattage.

Hope this helps....


05:59PM | 12/07/06
Member Since: 12/06/06
1 lifetime posts
"1000 watts" very likely refers to the microwave *output* power of the oven. Since the oven is not completely efficient (nothing ever is in life!), the input power required will be more than that. Looks like... a typical "1000 watt" microwave will require about 1700 watts of wall power. Dividing by 120 (volts), that would be 14 amps. For such a microwave, you better put in at least a 20 amp circuit. Even with nothing else on the circuit. Standard household wiring of 30 amps would be better.

*Note from Moderator*
Do not do above Read post from bill in follow up to this post.


04:18AM | 12/08/06
Member Since: 04/25/05
1915 lifetime posts
The only accurate source is the current listed on the name plate.

Do not install a 30 amp circuit. That would require a 30 amp receptacle and no residential microwave that I have seen comes with a 30 amp 120 plug.

Changing it or installing on a circuit other than speced in the manufactures instructions would void the warantee.

If the run is long you want need to upsize the wire because of voltage drop, but that does not make it a 30 amp circuit.

The only "standard 30 amp household circuits" are either 240 for electric water heaters or 120/240 for use with dryers and maybe some builtin ovens.


04:38PM | 05/17/15
I used 2 mot to build a powersupply(1=900watts 2=1750watts) how much amp wil the primary coils use.The circuit.socket wall is 230 volts


02:24PM | 04/02/18
Member Since: 04/02/18
1 lifetime posts
A friend wants to put a microwave (1000w) above his gas stove. currently the only nearby outlets are all on the same 20amp breaker. I'm assuming since his stove is gas, the only power draw would be or the clock and igniter, and I'm not yet sure what the power draw of his fridge is - but this a big problem?


07:43PM | 03/05/19


06:31PM | 11/20/19
I agree 100% with billhart


11:47AM | 09/10/21
Question on a microwave oven , if the watts rating is 1100 watts , the running current should be 9.17 amps , Is this a tire statement ??


12:21PM | 09/10/21
Okay we will do this again , on a microwave oven that is rated at 1100 watts , the running current is 9.17 amps at 120 volts circuit ? Is this a true statement .


03:52PM | 09/12/21
Actually, if you use all hand tools it would take 0 amps to install the microwave. If you use an electric drill it would take from 3 to 7 or more amps depending on the drill. (Proof reading is important:)

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