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Old 10-26-2016, 04:48 PM   #1
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High Voltage At Home Base Site

My home base site is in a residential area and for the past two morning at a few minutes until 6:00am my PT50C shut off my power. It comes right back on after the 2+ minute delay. For those that don't know, the PT50C is set to shut off power is the incoming line voltage exceeds 132 volts and the fault code set was high voltage on leg 2. I reported it to the power company both times and a lineman just left. All checks out fine here, but there is an industrial plant a few blocks away that he told me has caused some issues with large electric motors being overloaded, etc. He asked me to report it again tomorrow if it happens and he will run it up the ladder to engineering this evening.

My point is even at a residential site shore power isn't 100% perfect all the time.

Again, I will never ever plug in anywhere without my PT50C being inline.
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Old 10-26-2016, 06:12 PM   #2
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You may want to have your own residential panel and wiring checked for an open neutral. It's a condition that can often cause voltage spikes.
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Old 10-26-2016, 06:16 PM   #3
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It can cause havoc in a rv, especially if it comes and goes. The PT50C should shut it down.
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Old 10-26-2016, 06:37 PM   #4
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Quote:
Originally Posted by Marcm157 View Post
You may want to have your own residential panel and wiring checked for an open neutral. It's a condition that can often cause voltage spikes.
This is true.
But normally if the voltage is correct at the power company transformer, not much on your end will change it.
The industrial load may be the cause, but not at fault.
Utility companies sometimes switch capacitors and regulators on time vs load.
If this is the case and the industrial plant had a large load off line for maintenance or repair, you would see a spike in voltage.
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Old 10-26-2016, 07:05 PM   #5
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You can insist that the local power utility put a temporary voltage/current data logger on your lines coming in, but you need to make sure that you have eliminated any and all in house possibilities. Like have you purchased anything new that is electric (motor...), do you have a ground rod that is properly installed by the electrical box? All connections to the outlet that you are using to connect to the TT are tight? Hot, Neutral and Ground connections are tight in the service panel? Possible that an existing house AC compressor motor may be going bad? Fridge or freezer in the basement going bad? Try another outlet?

If it continues, and they prove that it is external to your location, you can have the local power utility go to the industrial complex and monitor their main service to them to see if they may be the cause of your problems. If they are, the utility will investigate the problem and possibly install new/different type transformers at the site or add a add a power capacitor bank to their incoming service to eliminate spikes an fluctuations. Are the neighbors turning on their electric water heaters for the 6 am showers? You know the ones that have to work everyday..

If you are sure that the problem is external to your residence and the power company will not do anything, you may want to look into installing your own power capacitor (Not sure of the exact name) for 220VAC.

Good Luck,

Don
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Old 10-26-2016, 09:00 PM   #6
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Yes, you should all connections. I bad neutral connection can cause an voltage increase in one or both legs of 240 volt. If you can't find the problem call the utility, the trouble man should have a Super Beast that replaces the meter and puts load on the service wires. It will let you know the voltage of both legs under load as well as checks for bad neutral on the service.
If its not the utility fault then call good electrician to find the bad neutral connection on your side of the meter.
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Old 10-26-2016, 09:01 PM   #7
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Originally Posted by Marcm157 View Post
You may want to have your own residential panel and wiring checked for an open neutral. It's a condition that can often cause voltage spikes.
2X As an electrical contractor I see this regularly. It causes light bulb to "blow", televisions, microwaves, anything electronic or a compressor to burn up.
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Old 10-27-2016, 09:39 PM   #8
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2X As an electrical contractor I see this regularly. It causes light bulb to "blow", televisions, microwaves, anything electronic or a compressor to burn up.
Wouldn't it also cause the meter to spin like a top and jack up your bill? Or am I asking about a few pennies?
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Old 10-27-2016, 11:08 PM   #9
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A bad connection will not cause the meter to spin faster.
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Old 10-28-2016, 05:12 AM   #10
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It's highly doubtful that if the OP had any problems with his residential power system that it would occur at the exact same time every day and only at that time.
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