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 14 replies
  • Subscribers 32 subscribers
  • Views 2670 views
  • Users 0 members are here
Options
You may also be interested in
This discussion is locked.
You cannot post a reply to this discussion. If you have a question start a new discussion

Tails size

Former Community Member
Former Community Member
Hello hope everyone has managed to keep safe this far. 


I need to install a TPN isolator from the cutout so if needed for future maintenance we can isolate panel board. 


​​​​​My question is what size tails would I need the isolator will be within 2m of the panel board looking at table 4D1A column 9 looks about right which leads to 70mm cable how easy are these to handle and terminate also are there any alternative suggestions? 


This will be my first time playing with tails this size ?


Thanks in advance Ts.
Parents
  • Former Community Member
    0 Former Community Member
    John Peckham:

    TS


    That will be for whole current metering. This job will be CT metering. You may need to provide a CT chamber or if you are lucky the DNO will provide the CT chamber or they may use one of the fancy new Schneider heads with the CTs built in. Sort out what the DNO want before you start the job.


    The site has an existing TP&N supply, since the client no longer wants the flexibility of the 200A supply the 100A existing should be fine to bring back into service, I'm pretty sure that all the metering is in place. You make some good points that I didn't consider such as the CT meter chamber etc, I'm on a steep learning curve, you only start really learning once you're out there doing the work ? has I say all the college stuff provides a foundation to work from. 


    Ts


Reply
  • Former Community Member
    0 Former Community Member
    John Peckham:

    TS


    That will be for whole current metering. This job will be CT metering. You may need to provide a CT chamber or if you are lucky the DNO will provide the CT chamber or they may use one of the fancy new Schneider heads with the CTs built in. Sort out what the DNO want before you start the job.


    The site has an existing TP&N supply, since the client no longer wants the flexibility of the 200A supply the 100A existing should be fine to bring back into service, I'm pretty sure that all the metering is in place. You make some good points that I didn't consider such as the CT meter chamber etc, I'm on a steep learning curve, you only start really learning once you're out there doing the work ? has I say all the college stuff provides a foundation to work from. 


    Ts


Children
No Data

Join us to get the best from IET EngX.

Joining EngX lets you personalise your experience so you stay up to date on the topics that interest you, plus you’ll be able to make connections who are looking to collaborate, exchange ideas and more.

Join us Not now

Community Rules & Guidelines