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Old 07-11-2016, 03:20 PM   #85
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There has been some discussion on this thread about the damage that could/will happen to an AC that is run on too thin of a line. I expect this is due to running at too low of voltage due to trying to pull too much amperage through too small of a line. Can any of you tell me what the maximum allowable loss is? For example, if I plug my multimeter into an outlet with nothing running, I see 119 volts. If I plug my Airstream into that socket using an adapter and run the AC, the voltage drops to around 112. Is this too much drop, or is it about normal?
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Old 07-11-2016, 03:37 PM   #86
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Generally anything above 110 is OK
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Old 07-11-2016, 03:40 PM   #87
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Ideally there should be no measurable voltage drop.
Most quality equipment is designed for a + or - 10% range. You are pushing the boundaries with what you are reading. The question is: how far does the voltage drop when the compressor kicks in?. And how long does it last? Your meters refresh time is too infrequent to give an accurate reading of that voltage drop. The lower voltage the higher the current to maintain the power requirement. Higher current = more heat.
Contrary to popular belief the electrons do not travel thru the wire, they travel on the surface. The larger the wire the greater the surface area.
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Old 07-11-2016, 04:01 PM   #88
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Fwiw, in 73 the air conditioner was likely built to run on 110 or 115 volts....

I have researched this some and there is a strong contingency that claims that a about a 10% variance at point of use is ok.

Fwiw, my 72 Armstrong has been running on about 109 volts during peak heat for six weeks this summer, and the same for the two summers prior.

http://www.pge.com/includes/docs/pdf..._tolerance.pdf

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Old 07-11-2016, 11:57 PM   #89
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Hi, house hold voltages have been stated as 110, 115, 117, and 120 volts. take your pick. Appliances have been rated at all of these voltages.
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Old 07-12-2016, 11:04 AM   #90
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Except with some very high frequencies. In household power, and low voltage applications, electrons travel through the whole wire, not just on the surface. Else, why don't our wires would look like water pipe?
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