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Old 10-06-2017, 05:44 PM   #1
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Camp Power Checker

I made myself a quick campground power checker. The idea is to hop out of the truck and do a quick check to see if it looks like a good choice.
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Old 10-08-2017, 09:48 AM   #2
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Interesting. I use my plug in surge protector for that.
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Old 10-08-2017, 12:11 PM   #3
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Originally Posted by SeaDog View Post
Interesting. I use my plug in surge protector for that.
I am probably going to do the hardwired surge protector. I didn't want to invest in the portable model and then buy a hardwired later. New trailer was built last week and is somewhere between here and there. Still waiting.
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Old 10-12-2017, 08:24 AM   #4
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I made myself a quick campground power checker. The idea is to hop out of the truck and do a quick check to see if it looks like a good choice.
Why the double meters?
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Old 10-12-2017, 08:29 AM   #5
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Why the double meters?
If it's a 50 amp outlet, you have two legs/lines to check for.

You can go to this site, and click on the outlet testing tab on the left, and see how to design these plug-n-play testers with the links at the bottom of that page. I have one for a 30 amp and use it every time. I have an analog volt meter, but do like the digital ones the OP is using better. ADK did an excellent job with his.

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Edit: Here is direct link for 50 amp tester form the site above:

http://www.myrv.us/electric/Pg/tester_50amp.htm

and 30 amp tester which is much simpler to put together

http://www.myrv.us/electric/Pg/tester_30amp.htm
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Old 10-12-2017, 08:33 AM   #6
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One thing that this won't tell you is if the 50 Amp service is using both legs of the 230 Volt service. If the outlet is wired to present only one leg to both prongs then you would expect to see what is in the picture. Identical voltages on both legs. At my home the voltage difference between the legs is always several volts due to load imbalances in the neighborhood and my home. The way to tell if it is a 50 Amp circuit is to measure between the two legs for 220-240 Volts which when split to the neutral would be two 110-120 volt legs.
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Old 10-12-2017, 08:43 AM   #7
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One thing that this won't tell you is if the 50 Amp service is using both legs of the 230 Volt service. If the outlet is wired to present only one leg to both prongs then you would expect to see what is in the picture. Identical voltages on both legs. At my home the voltage difference between the legs is always several volts due to load imbalances in the neighborhood and my home. The way to tell if it is a 50 Amp circuit is to measure between the two legs for 220-240 Volts which when split to the neutral would be two 110-120 volt legs.
I understand what you are getting at UT_Grandpa, however if you will click on the 50 amp outlet tester tab I linked to above, you will see in the instructions how they put in a light/circuit tester for just the scenario you are describing.

The OP can easily add this to his tester, if needed/applicable.



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Old 10-12-2017, 10:16 AM   #8
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The Neon tester tells the truth.

Nice circuit. Very simple. Thanks
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Old 10-12-2017, 11:27 AM   #9
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Why the double meters?
Left box is line L1 and right box is L2, its a 50 amp plug. If I have my shop lights on one leg is 1 volt less usually.
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Old 10-12-2017, 11:41 AM   #10
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When I looked at it I was thinking 30 amp. That’s why I questioned the double meters.
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