Search results

This probelm exists regardless of the earthing arrangement. TN-S, TN-C-S and TT all have their neutral point connected to earth at the transformer. If the neutral has a parrallel path back to the transformer then it will trip the RCD

No, double pole isolation means Line and Neutral are both open. Even if you had opened the MCB, if the RCD is shared with other circuits it could have still tripped.

No quiet, the reason the RCD trips even though you have isolated (using single pole isolation) is that you have created a parallell path for the neutral. If you still have a load(s) connected on other circuits, when you cut the cable you have effectively joined the neutral and earth. All...

With volt drop for a lighting circuit and a max load of about 5kW, 16mm2 would be about right for a 100m run

That is the point of this thread - but it has been hijacked about ripping software and dos vs windows. :roll: Judging by some of the replies I doubt the link was even clicked by some.

At last count there were over 300 pdfs/topics. You must have a lot of spare time if you could be bothered with the mind numbing task of downloading all them and merging. Also the PDFs are password protected so would this need removing as well. Added to that every few months more pdfs/topics...

Those of you that use The Essential Guide which is available free to NICEIC registered contractors will know that recently they withdrew the CD version of this useful guide and it is only available via the Internet. Apparently there was not enough interest in an off line version. The ESC are...

Also check for rodent damage to the cable in the loft, switch off the power first as there could be live exposed copper and touching it could be fatal.

What purpose would this test serve and what is the purpose of this post? Surely you would have noticed the strain relief clamps, if used properly the terminals would not be exposed to such stresses.

I believe that the ESQCR regulations prohibit a combined neutral & earth conductor within the consumer's installation. I can't find a reference at the moment but will post if I do. EDIT: Here it is http://www.legislation.gov.uk/uksi/2002/2665/regulation/8/made see 8 (4)

I don't have a copy of" BS EN 60670-22 Boxes and enclosures for electrical accessories for household and similar fixed electrical installations. Particular requirements for connecting boxes and enclosures", so do not know if they define what a terminal/termination point is. However as I read it...

Don't know what that means... me or Hager? I think you missed out some key words "in addition" I think if you are looking for a definitive standard you will be disapointed. However the regs do allow for new inventions; see 120.3 and 120.4. Hager have made what in my opinon is a good JB and...

Ashley/Hager did have a FAQ on this issue on their website, I can't find it, but did keep a copy for my records.

- humour. Just I can't get too worked up about niggles, trying to run a business in the current econonmic climate I have more important "niggles" to deal with, but point taken...

However it does mean that you don't need to blindly accept 16mm2 for the earthing conductor as the minumum csa for PME systems. Niggle all you want, here are a couple more for you Light Bulbs RJ45 plugs :D

Contact Citizens Advice Bureau http://www.citizensadvice.org.uk/index/getadvice Or maybe contact Consumer Direct on: 0845 404 0506?

From the pictures I would guess the cross sectional area (not diameter) of earthing conductor is 10mm2. It could be OK, but an electrician would need to verify this. Also those tails look like 25mm2 csa on both side of the blocks.

There is NO anomoly! The adiabatic equation is used for Protective Conductors not just cpcs. See definition of Protective Conductor. 542.3.1 is quiet clear that the earthing conductor shall comply with Section 543 (543.1.3 has the adiabatic equation) 542.3.1. also says where you have PME...

It could have been sized with the adiabatic equation, resulting in a size less than 16mm, as it is PME the bonding requirements would also have to be considered, so 10mm would then be the smallest CSA for the earthing and bonding conductors [Table 54.8]

I would seriously think of going down the LED route. Have a look at Halers EvoLED. I have installed these and they are very good. With a life of 75,000 hours they will last a lot longer than the Halogens which can have a life of 1000 hours. In addition to the savings on replacement lamps...