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arrangement

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  1. walsh builders

    1960's flats earthing arrangement

    Hi, I recently went to look at a rewire on a 1960's concrete construction flat on the 13th floor of a tower block in Hull. The set up at the moment is an archaic wired fuse board with lots of (badly done) additions to the wiring. The customer would like to rip it all out and bring it up to...
  2. telectrix

    To RCD or NOT?

    A scenario for trainees to consider. Sub P.O. requirement is for 6 x double unswitched socket outlets fitted to the underside of the counter for tills, card reader and other IT/ electronic equipment. wiring will be surface in plastic containment. The supply for these is from al local 4 way CU...
  3. B

    Why cant I use this lighting arrangement ......

    Young college lad who lives near me and who I occassionally give the benefit of my "knowledge and experience" to, presented me with this and asked me why he couldn't use it in a house circuit -- I guess he's been shown/taught it or something at college and was testing out my knowledge in the...
  4. B

    earthing arrangement

    Why it would be better off Changing tns to tt and comply with reg. because of not having reliable earth. When installation was tns earthing with Ze 18 ohms because swa was used as earth is corroded and 22ohms after changed to tt. Intallation is rcd protected before and now. Can anyone help me...
  5. L

    Voltage between Cpc and neutral

    Hi If anyone can help,I am carrying out an EICR on part of large hospital and have found voltage that varies between 100 and 200v between live and neutral on one single phase submain cu. It is present when main switch is off so is on load side. Apparently they get voltage around 0v to 60v...
  6. A

    Earthing arrangement TNCS or TNS and the DNO

    Hi, I wish to establish what the earthing arrangement is, the cut-out has a label above it that says "PME System" and the earth cable disappears into the bottom of the cutout and then comes back out the bottom and connects onto the supply cable sheath. Reading some other forums people suggest...
  7. B

    generator earthing systems

    can anyione give me a definitive answer to this question please . does a standby generator in a large building is it required to have a multiple earthing, earth rod + earth supply from main dno connected to one point on generator
  8. S

    Earthing arrangement testing procedures for a substation !

    Hello Everyone , Thanks in Advance for any help given it is very much appriecated ! I am mainly a domestic electrician working on houses , Recently we have been asked to do the earthing arrangements for a freestanding brick built substation for a single transformer ! Now lets get this straight...
  9. A

    Earthing arrangement in lighting.

    WHi all, I work for a well know gas company that now does electrical work also. Previously worked as an electrician for 5 years. Anyways not relavent. Went to complete a job today that someone else quoted, it was to change a CU and upgrade bonding. So I do the bonding and then make a start on...
  10. 1

    Need help in earthing arrangement

    Hello guys, hope you all keeping well. I'm new bird on this forums as this is my first post thread. Anyway, one of my customer saying, after every visit from British Gas engineer they always saying 'you don't have suppler earthing in your property. pls sort this out ASAP.' When i went on site...
  11. D

    Earthing arrangement and single to 3-phase upgrade

    Newbie here - please go easy on me, and I hope I'm posting in the right forum! ;) Existing arrangement as follows - single phase TNC-S supply provided in a remote building. This building has a substantial 3-phase company supply, but my supply is tapped off the incommer, and through a a single...
  12. T

    External socket for caravan.

    I need to fit a 16A external socket to provide a feed for a caravan for appliance testing etc prior to going on the road. The main house has a TNCS earthing arrangement. I have checked out 708 and 721 of BS 7671 and it isn't giving me what I need to know. What is the best circuit arrangement for...
  13. M

    Earthing arrangement???

    I wonder where the main earth goes, says I ? ? ? That'll be nowhere then! So the question is, who's fault would this be?
  14. D

    Earthing arrangement advice please

    Hi lads Looked at a job today 3036 Fuseboard Looks like TT but only 2.5mm earths visible, couldn't find a stake and 126ohms Ze on a wet day. There is an old earth leakage breaker, it did not trip when put under 500mA RCD test, does this mean its f***ked? The supply fuse looks Like a TNCS head...
  15. 1

    System Earthing Arrangement by enquiry!

    What a load of old tosh! Western Power - Sorry we do not keep these details on record. We can arrange to send someone out to have a look for you. That's pointless because they'll find the same locked door as I did grrrrrrr
  16. G

    how are you all dealing with this new EPC arrangement?

    This new EPC arrangement is causing us some problems, particularly with commercial jobs where the EPC can be £250-400 a pop, which is a fair size chunk out of the profit margin if we're having to do this twice on jobs we've already contracted for. on domestic, we're doing our first job tomorrow...
  17. S

    TNCS Outbuilding earthing arrangement

    I have a large shed (affectionately known as the warehouse) that is fed by a 16amp rcbo. The main earthing arrangement at the distribution boards is tncs and now a more experienced electrician than myself has stated that the earth in the 3 core 2.5mm armoured cable should be connected to a...
  18. ebow72

    Ring and Radial Arrangement Questions

    Hello all, I have mentioned in other posts I try and treat this forum as an extension of my place of work (Still awaiting work placement) Anyway, here are my questions / queries. Other than the area served via a ring circuit what other pro's are there for going with this method. It seems daft...
  19. S

    Earthing arrangement

    Morning.. Client at a property has asked me to change pendants to downlights, after discovering no earth in either sockets or lights I checked incoming supply and found it looks to me like it has been TT but N separated by someone? How do I add a pic?
  20. C

    Strange Earthing Arrangement

    Had my ELECSA assessment the other day with Gary Stevens top bloke and he brought to my attention the Earthing Arrangement at a job I took him to the arrangement looks like a TN-S but he told me I had to put an earth rod in so it becomes a TT he also told me that this kind of earthing...

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