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 44 replies
  • Subscribers 32 subscribers
  • Views 2787 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

EV install on a TT system - DNO PME?

Former Community Member
Former Community Member

Hi, new to this forum.

These might be obvious questions but I can't find an answer to it. 

Background.

A domestic house has a TT supply, has had a CU changed in 2019 but the new owners have no paperwork.

I can find no evidence of an earth rod anywhere and all the bonding cables go to the gas/water supplies. I did a quick Zs at the board = 2.9ohms. 

How do I know if the installation has been PME'd on the pole? (overhead wires)

Second part is - they want an EV charger installed that they brought with them from their old house. It will require TT, but as this property is TT it shouldn't need to have a separate rod.

If the installation is  a PME'd TT I would assume I would need to TT the EV?

Parents
  • 0

    ebee: 
     

    Colin Haggett: 
     

    The SWA cable is over sleeved with the black core sleeved blue and the grey core sleeved green/yellow. Should really be the other way around.

    Yes that`s my preference too . Partly from the old Red Yellow Blue it was common to see done as Red = L , Y = earth and Blue “Oh it`s now a N colour! (The Wire Fire and F O Brigade) ” 

    Wasn't yellow used as a C.P.C. because it was already half of the green and yellow for earth anyway? Oversleeved with green and yellow it is quite suitable.

    514.3.2. “Every core of a cable shall be  identified at its terminations and PREFERABLY throughout its length….”

    So, we can use any core colour for any purpose, except green and yellow, as long as the usage is clearly indicated at terminations. I use black oversleeved with blue for neutrals if necessary. I never use green and yellow as a live conductor, sleeved or not.

     

    Z.

Reply
  • 0

    ebee: 
     

    Colin Haggett: 
     

    The SWA cable is over sleeved with the black core sleeved blue and the grey core sleeved green/yellow. Should really be the other way around.

    Yes that`s my preference too . Partly from the old Red Yellow Blue it was common to see done as Red = L , Y = earth and Blue “Oh it`s now a N colour! (The Wire Fire and F O Brigade) ” 

    Wasn't yellow used as a C.P.C. because it was already half of the green and yellow for earth anyway? Oversleeved with green and yellow it is quite suitable.

    514.3.2. “Every core of a cable shall be  identified at its terminations and PREFERABLY throughout its length….”

    So, we can use any core colour for any purpose, except green and yellow, as long as the usage is clearly indicated at terminations. I use black oversleeved with blue for neutrals if necessary. I never use green and yellow as a live conductor, sleeved or not.

     

    Z.

Children
No Data

Community Rules & Guidelines