larry cad
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RCMAN46 wrote:RVnRobin wrote:larry cad wrote:It is entirely possible that the campground has purposely jacked up their voltage in order to keep it from dropping too low when loaded by A/C's and such.  I don't know how they would do this... The power company provides and installs the step-down transformers that feed the campground. And, the transformers are not adjustable. Not sure to what you are referring to.
To OP, you might try using a different meter to double check. The step-down transformers that the power company has do have voltage taps and are thus adjustable. But it is not likely the power company would set the voltage above their normal limits. The campground could request that they set the taps to the high end though.
Step down transformer ownership is typically optional. If the utility supplies them, they charge more for the power. If the end user supplies them, they get a break on the power rates. As an electrical contractor, many of my customers own their transformers and pay less for power. They also have the ability to adjust the final voltage to suit their needs. We have adjusted a customers final voltage on several occasions, depending on what the utility is supplying and what the customer actually needs. I repeat my previous caution: the OP has reported a voltage which is marginally on the high side of published limits and it would be prudent to double check it (which he has done). Operation at voltage either above or below published tolerance is like a slow cancer that will eventually cause failure of electrical devices.
When I listed my voltage tolerances, I gave references where I came up with those tolerances. Others on here have stated tolerances and offered no proof other than their good name and reputation to support those numbers. I stand by my statements as being factual and accurate. If others can provide documentation supporting their tolerances, I would like to see it.
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Wayne Dohnal
Bend, OR.
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Quote: If others can provide documentation supporting their tolerances, I would like to see it.
Norcold DE/EV0041 and DE/EV0061 RV refrigerators, maximum voltage 132, page 13 of Owner's Manual.
Progressive Dynamics converters, maximum 130, all over their web site.
Parallax 7300 series converters, maximum 130, from spec sheet.
WFCO converters, maximum 130, from spec sheets.
RVP Coleman air conditioners, maximum 126.5, from web site FAQ.
For those devices that have a maximum AC voltage specified, 126.5 is the lowest I've seen.
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vtchris
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I brought this to the attention of the park's maintenance man Bruce. He was quite responsive and came right over. His tester showed 128.4 also. He couldn't explain it, but investigated. It turned out that about half of this large park was getting high voltage, some sites, including Bruce's, were over 130V. So the power company came out. That guy seems to think it is a stuck regulator and will have to return tomorrow as he got called out on a transformer on fire.
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larry cad
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Wayne Dohnal wrote:Quote: If others can provide documentation supporting their tolerances, I would like to see it.
Norcold DE/EV0041 and DE/EV0061 RV refrigerators, maximum voltage 132, page 13 of Owner's Manual.
Progressive Dynamics converters, maximum 130, all over their web site.
Parallax 7300 series converters, maximum 130, from spec sheet.
WFCO converters, maximum 130, from spec sheets.
RVP Coleman air conditioners, maximum 126.5, from web site FAQ.
For those devices that have a maximum AC voltage specified, 126.5 is the lowest I've seen.
Thanks Wayne. I feel much better.
To the OP, DON'T run your A/C until you get your voltage down as the manufacturer specifies 126.5 max!
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kennybob
Russell, Ontario, Canada
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This is for all you electrical engineers out there! The at the "outlet" voltage should be 120 volts. A variation of plus/minus 10% is within tolerance levels. 128.4 volts is about 7% so is within tolerance. In answer to the poster's question, yes, 128.4 volts is OK!!!!
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Wayne Dohnal
Bend, OR.
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Quote: The at the "outlet" voltage should be 120 volts. A variation of plus/minus 10% is within tolerance levels. I'll disagree with this. The voltage at the service drop is supposed to be 120. The voltage at the outlet is assumed to be 115 after drops due to the wiring, and it's 115 that the +/- 10% is figured off of for equipment operating voltage. I have never seen a native-English equipment spec for 120 +/- 10%. Maybe Canadian specs are different than US specs.
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