The IET is carrying out some important updates between 17-30 April and all of our websites will be view only. For more information, read this Announcement

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

  • Replies 14 replies
  • Subscribers 37 subscribers
  • Views 709 views
  • Users 0 members are here
Options
You may also be interested in

Flexible 'tails'

grahamro

I was working on a job the other day where an e.on man was fitting a smart meter.
In converstion he told me that e.on were taking out any flexible tails they found fitted between the cut out, meter and any isolator installed.
From the meter or isolator, the customers 'tails' if flexible would of course be left installed.
Seeing as how I'm trying to save more wear and tear on my digits which are now suffering badly after years of bending 25 & 35mm2 'tails' I'll keep using flexible 'tails' untiil I'm told oficially a reason not to.
Apparently this doesn't apply to various other service providers.

Parents
  • grahamro said:
    I'll keep using flexible 'tails' untiil I'm told oficially a reason not to

    To be clear, whilst often advertised as such, e.g. https://www.cef.co.uk/catalogue/products/4626461-25mm-flexible-double-insulated-meter-tail-pack-1m, 19-strand tails are in fact Class 2 stranded circular conductors. BS EN 60228 only specifies the minimum number of strands for Class 2 conductors, being 7 for 25 sq mm and 35 sq mm csa. Whilst for Class 5 flexible conductors BS EN 60228 specifies only a maximum diameter of wires, this would lead to a minimum of around 190 strands for 25 sq mm csa and 266 strands for 35 sq mm csa.

    What's the issue, can they be used without special preparation?

    Well, that depends on what the terminal manufacturer has designed and tested for ... if it's the minimum in a standard, perhaps not.

Reply
  • grahamro said:
    I'll keep using flexible 'tails' untiil I'm told oficially a reason not to

    To be clear, whilst often advertised as such, e.g. https://www.cef.co.uk/catalogue/products/4626461-25mm-flexible-double-insulated-meter-tail-pack-1m, 19-strand tails are in fact Class 2 stranded circular conductors. BS EN 60228 only specifies the minimum number of strands for Class 2 conductors, being 7 for 25 sq mm and 35 sq mm csa. Whilst for Class 5 flexible conductors BS EN 60228 specifies only a maximum diameter of wires, this would lead to a minimum of around 190 strands for 25 sq mm csa and 266 strands for 35 sq mm csa.

    What's the issue, can they be used without special preparation?

    Well, that depends on what the terminal manufacturer has designed and tested for ... if it's the minimum in a standard, perhaps not.

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