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.

  • State Helpful Answer
  • Replies 27 replies
  • Subscribers 38 subscribers
  • Views 727 views
  • Users 0 members are here
Options
You may also be interested in

Exporting PME to Socket in high street.

M.L.R

Hi All

First time question,

On doing a EICR on a feeder pillar, in a shopping pedestrian high street. Which controls decorative floor recessed lighting and also Ceeform Socket in manholes in the floor. They access sockets by lifting the lid and then plugging into them. They are market traders that use the outlets and plug in various items small and large Class 1, one of the largest items I have seen plugged in is a Stainless steel Fish counter on wheels, Bake potato ovens on steel benches ect. 

The earthing arragement is TNC-s. The panel was contructed by a well know high street furniture panel maker. Wiring may have been done by others. This is a unkown.

All lighting are on MCBs

All sockets on RCBOs 

So I have failed/or going to fail the installation due to exporting the PME to the socket outlets and for others reasons.The reason for this was,upon reading the (Guide-to-highway-electrical-street-furniture section 6). As section 6.5 mention being supplied from a TT system. Also in section 6.11.2. On completion of the construction phase of an installation a full electrical inspection and test must be carried out to confirm that the installation complies with BS 7671 in its entirety but especially to Part 7, Section 708 – Electrical installations in caravan/ camping parks and similar locations as applicable.(aiming this should be TT)

Just for clarifiction, am I missing something.As I could not see the manufacture doing this! If they did do it or I'm missing something. 

If this is true and should have been TT, then raising another issue if changed there could be  2 earth arrangments within arms reach within the High street.Thats for another day.

Look foward to your Input.

Cheers

Mark

Parents Reply Children
  • 0 in reply to gkenyon

    HI

    Thanks for your reply

    The client will achive neither of thoses requirements, So this system is going to fail.I still need a work round to satisfy me. I have used this section on another high street, that they look after which operates music stands and other electrical equipment. Again same issues in high street  PME influence everywhere. Or do I look at O-pen as a real option or Electrode at the feeder pillar at 20 ohms.Failing that, it will be TT. but a huge design plan on the possiblities of 2 earth arrangment with in high street. This would than have to be passed to a specialist in this field.

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