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Important - check this every time you set up |
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jimqbaum 
Newbie 
Joined: 11 Jan 2016 Location: Virginia Online Status: Offline Posts: 39 |
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 Topic: Important - check this every time you set upPosted: 16 Feb 2016 at 11:24am |
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Thank you JMSOKOL for the clearest concise explanation yet of the grounding issue.
Impedance is the key to understanding this! Thanks  |
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Have A Blessed Day
Pod 171 Ram Hemi tow truck. Got rid of the Jeep Wrangler. It was puny and girly |
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Pilot
Groupie 
Joined: 26 Jul 2015 Location: Pinckney, Mi Online Status: Offline Posts: 91 |
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Posted: 18 Feb 2016 at 1:06pm |
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Wow, everything I wanted to know about grounding!
 Not good though in aviation!!Thanks for the tutorial. Okay, so is there any problem using say a 20 foot negative lead from tester back to the pedestal with alligator clips on each end. Most of the time you are not going to be close enough to the post to use the short leads on the tester? That hand held tester still has a threshold before it alarms. Is anything before the alarm okay? |
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Walt & Lynne
2015 r-pod 177 08 F150 or 2014 Explorer Pinckney,Mi |
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jmsokol
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Joined: 21 May 2014 Location: Maryland Online Status: Offline Posts: 89 |
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Posted: 18 Feb 2016 at 2:20pm |
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Yes, we often use extension wires to extend meter leads.
While a NCVT will alarm reliably down to 40 volts or so AC, the Gold Standard test is to actually meter between the chassis and a known-good service panel connection. That usually entails a run of 100 feet or more. As you can see, that's only done in extreme circumstances, so the NCVT check is a great Triage method for finding bigger electrical grounding problems. |
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mike@noshockzone.org
www.noshockzone.org |
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Pilot
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Joined: 26 Jul 2015 Location: Pinckney, Mi Online Status: Offline Posts: 91 |
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Posted: 18 Feb 2016 at 2:31pm |
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Thanks.
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Walt & Lynne
2015 r-pod 177 08 F150 or 2014 Explorer Pinckney,Mi |
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Rustler
Senior Member 
Joined: 07 May 2016 Location: S. Oregon Coast Online Status: Offline Posts: 100 |
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Posted: 17 Jun 2016 at 12:10am |
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I have just installed a Progressive Industries EMS-HW30C electrical management system, hardwired into the shore power lead-in. Do you see any potential electrical faults that would get past this device? It is advertised to protect against:
It is supposed to prevent connection to the power source if any of these faults are present. With lifetime warranty and field repair capability, it seemed like a good investment. Does anyone have experience with this product? |
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Russ
2009 Toyota RAV4 V6 w/ tow package 2016 Rpod 171 HRE |
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jmsokol
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Joined: 21 May 2014 Location: Maryland Online Status: Offline Posts: 89 |
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Posted: 17 Jun 2016 at 7:46am |
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The only outlet miswiring condition it can't find is something I call an RPBG (Reverse Polarity Bootleg Ground). See http://www.rvdoctor.com/2001/07/friends-of-gary-mike.html and https://www.google.com/search?q=EC%26M+RPBG&ie=utf-8&oe=utf-8
Otherwise, this is a great unit. Probably the best on the market. |
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mike@noshockzone.org
www.noshockzone.org |
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Jazz trumpet
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Joined: 28 Jun 2016 Location: Hobart, IN Online Status: Offline Posts: 55 |
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Posted: 12 Jul 2016 at 8:59am |
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Yikes I never knew this. I will investigate and buy the right item
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John and Marilyn
2016 Rpod 180 2001 Chevrolet Suburban |
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Jazz trumpet
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Joined: 28 Jun 2016 Location: Hobart, IN Online Status: Offline Posts: 55 |
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Posted: 12 Jul 2016 at 9:04am |
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Yikes I never knew this. I will investigate and buy the right item
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John and Marilyn
2016 Rpod 180 2001 Chevrolet Suburban |
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techntrek
Admin Group - pHp 
Joined: 29 Jul 2009 Location: MD Online Status: Offline Posts: 9059 |
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Posted: 02 Aug 2016 at 6:21pm |
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Just a note that on our trip last month I discovered yet another string of power poles with no ground. To their credit, they had an electrician there the next morning.
Don't forget to test every time you hook up!
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Rustler
Senior Member
Joined: 07 May 2016 Location: S. Oregon Coast Online Status: Offline Posts: 100 |
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Posted: 20 Aug 2016 at 3:01am |
I have a question for you or Mike. What happens if you test your campground outlet with the NCVT and find it is OK. You hook your RV up and later another RV checks in to the campground. If that RV has the infamous RPBG miss-wiring, will that affect other RVs connected to the campground wiring? Or would that cause the offending RV to trip the circuit breakers at his supply post? I do have the Progressive Industries EMSHW30C unit installed on the shore power line.
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Russ
2009 Toyota RAV4 V6 w/ tow package 2016 Rpod 171 HRE |
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