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 3 replies
  • Subscribers 32 subscribers
  • Views 2438 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

SPD on TT system

lyledunn
6bf4417090a42c9e22fd39bd0931f8e7-huge-502858c5-e119-40f1-9c4d-cdc78b4069c4.jpg

This is on a TT system. Just wondering what the essential difference is between a TN and TT connection and the consequences if it is incorrect.
Parents
  • 0
    I’m glad you have asked this question, I tried asking during a webinar Q&A session a couple of years ago and still don’t feel I have fully grasped it.


    In my minds eye I see voltage on either live or neutral being dumped to true earth in a TT or TNS installation, but with neutral and earth being combined in a TNCS installation a SPD connected between neutral and “earth” can’t do anything as they are the same conductor.


    Andy B
Reply
  • 0
    I’m glad you have asked this question, I tried asking during a webinar Q&A session a couple of years ago and still don’t feel I have fully grasped it.


    In my minds eye I see voltage on either live or neutral being dumped to true earth in a TT or TNS installation, but with neutral and earth being combined in a TNCS installation a SPD connected between neutral and “earth” can’t do anything as they are the same conductor.


    Andy B
Children
No Data

Community Rules & Guidelines