Rules and Guidelines
Want to participate in the discussions? Please read our Community Rules and Guidelines. Need some help? Visit Support and Answers.

  • State Not Answered
  • Locked Locked
  • Replies 12 replies
  • Subscribers 32 subscribers
  • Views 1810 views
  • Users 0 members are here
Options
You may also be interested in
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Caravan Hook-Up Point Earthing.

Zoomup
Greetings,


 I was out and about today at a large sports ground field that has 5 caravan hook up points, two pairs and a single all separated by many hundreds of metres.


I had to test them as the new season will start soon. The sports field is very large and has a few flood lights situated around it fixed to high metal lighting columns.


I came to the first twin 16 Amp caravan hook-up point. It had a single R.C.D. and two blue sockets in an all insulated enclosure cable tied to a lighting column.


I could not confirm the earthing arrangement as I had no access to the main club house meter position.


So I carried out a loop test at the sockets and had a result of 1.41 Ohms, far too low to be a TT earthed socket.


What then was my concern?


Z.
Parents
  • 0
    gkenyon:

    If you suspect not TT, possibly Regulation 525.202 volt-drop before we go anywhere else ... but if the lighting columns are not on the same earthing system Regulation 411.3.1.1

     


    I turned a blind eye to Volt drop as the club needs income from caravan rental for holiday makers. I did tell the manager's wife that each van will be restricted to about 10 Amps max. I thought "safety first". The flood lights will not be used during the caravanning season so the full supply will be available for the caravans. I decided to TT earth the hook up point sockets to play safe and to complete the mission. But then I remembered that I had to locate the new earth rod well away from what was probably a metal TN-C-S earthed lighting column. So I ran a green and yellow conductor in some white plastic conduit, ( to make it obvious and prevent damage) on the ground along a tree line to distance the earth rod away from the lighting column. About 4 metres seemed to do the job. That was my concern, the distance.


    Z.


Reply
  • 0
    gkenyon:

    If you suspect not TT, possibly Regulation 525.202 volt-drop before we go anywhere else ... but if the lighting columns are not on the same earthing system Regulation 411.3.1.1

     


    I turned a blind eye to Volt drop as the club needs income from caravan rental for holiday makers. I did tell the manager's wife that each van will be restricted to about 10 Amps max. I thought "safety first". The flood lights will not be used during the caravanning season so the full supply will be available for the caravans. I decided to TT earth the hook up point sockets to play safe and to complete the mission. But then I remembered that I had to locate the new earth rod well away from what was probably a metal TN-C-S earthed lighting column. So I ran a green and yellow conductor in some white plastic conduit, ( to make it obvious and prevent damage) on the ground along a tree line to distance the earth rod away from the lighting column. About 4 metres seemed to do the job. That was my concern, the distance.


    Z.


Children
No Data

Community Rules & Guidelines