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Is it normal for an AC to use over 120% of it's rated power?

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Is it normal for an AC to use over 120% of it's rated power?

Old 08-16-10, 01:03 AM
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Is it normal for an AC to use over 120% of it's rated power?

Well, I have an AC unit that's rated at 1300W, but it's using 1584W. I was wondering why I couldn't run my computer and AC at the same time, it should work at 1300W, but at 1584, no way. Anyways, my question is, is this normal?







Old 08-16-10, 07:06 AM
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Re: Is it normal for an AC to use over 120% of it's rated power?

What does it say the current is? Power factor is going to suck on it.
Old 08-16-10, 07:21 AM
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Re: Is it normal for an AC to use over 120% of it's rated power?

when it's hot as as the sun's surface outside then yes
Old 08-16-10, 08:48 AM
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Re: Is it normal for an AC to use over 120% of it's rated power?

I don't ask questions so long as my apartment is cool.
Old 08-16-10, 09:38 AM
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Re: Is it normal for an AC to use over 120% of it's rated power?

It shouldn't, but
*Your Kill-O-Watt thing might not be perfectly accurate either.
*If the voltage is not exactly rated voltage, it may draw more or less
Old 08-16-10, 09:51 AM
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Re: Is it normal for an AC to use over 120% of it's rated power?

Originally Posted by D.Pham00 View Post
I was wondering why I couldn't run my computer and AC at the same time
Most power outlets have a socket on the top AND the bottom. But you could try a splitter.
Old 08-16-10, 10:03 AM
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Re: Is it normal for an AC to use over 120% of it's rated power?

It's 'Made in China'
Old 08-16-10, 10:11 AM
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Re: Is it normal for an AC to use over 120% of it's rated power?

Originally Posted by asabase View Post
What does it say the current is? Power factor is going to suck on it.
current is 14.71 A

Originally Posted by OldDude View Post
It shouldn't, but
*Your Kill-O-Watt[sic] thing might not be perfectly accurate either.
*If the voltage is not exactly rated voltage, it may draw more or less
i understand if it's +/-5%, but over 20% over seems...a bit much?

it's rated for 115W, but the volt is reading as 109.5V. i think, if the voltage drops a bit, then it should use bit more current, but the overall wattage should be the same, right?

btw, are you guys seeing the pics in the OP?

Last edited by D.Pham5GLTE (>60GB); 08-16-10 at 10:15 AM.
Old 08-16-10, 10:33 AM
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Re: Is it normal for an AC to use over 120% of it's rated power?

The pics are coming in fine.
Old 08-16-10, 10:40 AM
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Re: Is it normal for an AC to use over 120% of it's rated power?

Originally Posted by Thor Simpson View Post
Most power outlets have a socket on the top AND the bottom. But you could try a splitter.
sorry for the confusion, my computer is plugged into another outlet, but on the same circuit. it's not an issue of not having enough physical plugs, more an issue of having not enough power, when i run both my computer and AC, after a few minutes, the power goes out, and i hear beep beep beep from my UPS units.
Old 08-16-10, 01:57 PM
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Re: Is it normal for an AC to use over 120% of it's rated power?

If it's really drawing 14.7 A, anything your computer draws will put it over the 15 A for the circuit. If it's a 20 A circuit, you'd probably be OK.

The consumption is a little high, but I don't know if they would consider it as needing repair. Everything from China seems to be made entirely from melamine, antimony, and lead, and not meet spec. They have abysmal quality control and environmental regulation.
Old 08-16-10, 02:43 PM
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Re: Is it normal for an AC to use over 120% of it's rated power?

Originally Posted by OldDude View Post
If it's really drawing 14.7 A, anything your computer draws will put it over the 15 A for the circuit. If it's a 20 A circuit, you'd probably be OK.

The consumption is a little high, but I don't know if they would consider it as needing repair. Everything from China seems to be made entirely from melamine, antimony, and lead, and not meet spec. They have abysmal quality control and environmental regulation.
that's the problem, i have a 15A circuit. i guess, i could run my laptop, that draws like 30W.

my question is though, is there something wrong with the AC unit, or is it normal for it to be drawing that much power? though, from what you say, it seems to be normal?

although, my kill-a-watt is also made in china, so who knows, maybe it's reading wrong? but i suspect that it isn't cuz i should be able to run the computer and AC at the same time if it's running at rated wattage.
Old 08-16-10, 02:54 PM
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Re: Is it normal for an AC to use over 120% of it's rated power?

If you want to know if your kill-a-watt is correct, try it with other appliances/electronics items. I'm guessing the A/C is faulty. You might want to write to the A/C manufacturerer and see what they say. Is it still under warranty?
Old 08-16-10, 02:57 PM
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Re: Is it normal for an AC to use over 120% of it's rated power?

your tester is probably using 250W
Old 08-16-10, 09:43 PM
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Re: Is it normal for an AC to use over 120% of it's rated power?

Originally Posted by GMan2819 View Post
If you want to know if your kill-a-watt is correct, try it with other appliances/electronics items. I'm guessing the A/C is faulty. You might want to write to the A/C manufacturerer and see what they say. Is it still under warranty?
it's been just over a year, one year is the main warranty, 5 years is the sealed system and compressor. i may just take it back to Costco.

btw, my computer uses about 70W at idle, and 150-160 using prime95 max heat/power consumption test. my monitor used about 30W.

Last edited by D.Pham5GLTE (>60GB); 08-16-10 at 09:46 PM.
Old 08-16-10, 11:14 PM
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Re: Is it normal for an AC to use over 120% of it's rated power?

i tested my fan, it says 0.6A, and with the meter, it read 0.56A, so the meter seems to be okay.
Old 08-17-10, 07:45 PM
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Re: Is it normal for an AC to use over 120% of it's rated power?

What temperature do you have the AC set to? I have my AC plugged into a kill-a-watt and I noticed that it draws more power the colder it gets in the room.
Old 08-17-10, 08:10 PM
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Re: Is it normal for an AC to use over 120% of it's rated power?

Originally Posted by John Richmond View Post
What temperature do you have the AC set to? I have my AC plugged into a kill-a-watt and I noticed that it draws more power the colder it gets in the room.
i normally set it to 82-84, depending on how i feel.
Old 08-17-10, 08:45 PM
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Re: Is it normal for an AC to use over 120% of it's rated power?

I keep mine at 81-83 and when it's gets to around 81 it's pretty much drawing it's rated power (mine is an 8000btu LG). For the record, my 8000btu unit is rated at 800 watts and it's drawing 850 now with my voltage being 119 volts.

It's possible that your wattage rating is a little optimistic for a 14000btu model. The lower voltage probably isn't helping anything either.
Old 08-17-10, 09:35 PM
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Re: Is it normal for an AC to use over 120% of it's rated power?

Jeez, are these window/wall AC units? Do the compressor even come on when you set them to 80+? I have 2 LG units and a fridgeaire, the minimum temp I can set them to is 76 to even feel OK comfortable but often it's set to 72-74.
Old 08-17-10, 09:52 PM
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Re: Is it normal for an AC to use over 120% of it's rated power?

Originally Posted by zuffy View Post
Jeez, are these window/wall AC units? Do the compressor even come on when you set them to 80+? I have 2 LG units and a fridgeaire, the minimum temp I can set them to is 76 to even feel OK comfortable but often it's set to 72-74.
it's a portable AC unit. and yes, the compressor turns on at 80+, i think max is 86 on the dial. if i set it at 72, it'd probably run for hours non-stop. i do have a big room though.
Old 08-17-10, 09:55 PM
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Re: Is it normal for an AC to use over 120% of it's rated power?

Originally Posted by zuffy View Post
Jeez, are these window/wall AC units? Do the compressor even come on when you set them to 80+? I have 2 LG units and a fridgeaire, the minimum temp I can set them to is 76 to even feel OK comfortable but often it's set to 72-74.
Mine is a window unit in my bedroom. When it's 100+ outside and the rest of the house is 90 then 82 in the bedroom feels kinda chilly.
Old 08-17-10, 10:36 PM
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Re: Is it normal for an AC to use over 120% of it's rated power?

Have yoiu tried cleaning the coils? Maybe the guts are all crapped up, and the unit needs to work harder?
Old 08-17-10, 11:26 PM
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Re: Is it normal for an AC to use over 120% of it's rated power?

Originally Posted by jonw9 View Post
Have yoiu tried cleaning the coils? Maybe the guts are all crapped up, and the unit needs to work harder?
it's a completely enclosed unit(no external coils). i guess, i could take it apart. but i doubt it's dirty, i rarely use it.
Old 08-18-10, 12:36 AM
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Re: Is it normal for an AC to use over 120% of it's rated power?

The computer will not work at all when the AC is on?

I think the problem with your question is that you didn't check the watt use when you first got it so it's hard to tell if something is faulty now.

I am just taking a guess - the capacitor may be going bad and eventually it'll fail and need to be replaced.

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