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How much power can the average US electrical plug provide?

post #1 of 20
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I'll be powering on a bunch of stuff as soon as a couple of things arrive in the mail... i was just wondering how much power does the average household electrical plug provide? (i use a power strip)

I really can't afford messing up anything in my house
I heard some people had to pay an electrician to rewire their house so they could provide sufficient power to their rigs without the circuit breaking or something (don't really have any technical idea of what i am talking about )
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post #2 of 20
Hi Badatgames,

There is no standard per se', however most household circuits will carry 10.15, or 20 amps. You will need to see what size the breaker is to determine what size load that particular plug can handle.
    
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post #3 of 20
Most homes have 15A breakers (15A*115VAC = 1725W)

Newer houses may have 20A breakers (20A*115VAC = 2300W)

Wall voltage can vary between 115VAC and 125VAC, but it's safer to assume the lower voltage.
post #4 of 20
Quote:
Originally Posted by preachp View Post
Hi Badatgames,

There is no standard per se', howe3ver most hoisehold circuits will carry 10.15, or 20 amps. You will need to see what size the breaker is to determine what size load that particular plug can handle.
That doesnt help since you font tell us how many volts. its certainly not 12 since 20 x 12 = 240w.
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post #5 of 20
Quote:
Originally Posted by Phaedrus2129 View Post
Most homes have 15A breakers (15A*115VAC = 1725W)

Newer houses may have 20A breakers (20A*115VAC = 2300W)

Wall voltage can vary between 115VAC and 125VAC, but it's safer to assume the lower voltage.
yep that's correct.

For me though I have EVERY outlet connected to a 40amp circuit and each plug can provide 20 amps
Edited by nbmjhk6 - 8/14/11 at 9:20pm
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post #6 of 20
If you overload the circuit you will simply cause the circuit breaker to open. Perhaps you list all the power consuming devices you want to run at the same time. The trouble with depending so heavily on the breaker to open is that one in a million chance it does not open before something bad happens.

I hope you simply did not increase the breaker size but leave the wiring gague the same,this is dangerous. If you have two twenty amp circuits in one room somebody certainly did some work there because this is way non-standard.
Edited by PCCstudent - 8/14/11 at 9:23pm
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post #7 of 20
Many more recent houses have lots more outlets, and can often have more than one circuit per room to cope with people's increased demand for power.
You try leaving a home theatre PC setup running a big screen plasma TV while someone else uses the vacuum cleaner in the same room in an older house, and you may well trip the breaker.
I'd be very shocked if anywhere had building codes which actually prevented installing more than one outlet circuit into a room.
We don't tend to need that over here in Europe, where the higher line voltage allows each outlet here to provide 2860w each, with a total draw of 6600w over each circuit (assuming a 30a breaker and 220v AC, outlets here are rated to 13 amps).
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post #8 of 20
You certainly can have more than one outlet but it typicaly is on the same 15 amp breaker.Earlier in the summer I explored bringing a 230V line into my bedroom for an AC unit and an additional 15 amp 115V line (for a large amount of PC's) and it was all allowed by code,still expensive to have an electrican do it though.

People that break code with the 230V line typically make up what is in effect an extension cord made up of electric dryer connections and heavy cabling,now that is not to code.
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post #9 of 20
so 2300W max in USA ?

In Britain, the max fuse in a plug is 13A x 240v = 3120w,

. . . no wonder the kettles take an age to boil in america.
    
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post #10 of 20
Quote:
Originally Posted by Elis View Post
so 2300W max in USA ?

In Britain, the max fuse in a plug is 13A x 240v = 3120w,

. . . no wonder the kettles take an age to boil in america.
Technically the max would be 2500W (20A*125VAC).
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