earthing

  1. mak

    Question about earthing the armour of SWA

    If cpc core is present i.e. it's either 5 core three phase or 3 core single phase — is a banjo connected with a brass screw into steel trunking adequate to earth the armour(provided trunking is earthed to the earth bar)? Or would you put fly leads in between then a fly lead to an earth bar? Thanks.
  2. D

    TNCS or TNS earthing arrangement?

    Please can someone explain if this is a TNCS or a TNS earthing arrangement because it looks like both to me. Old undersized main bonding conductor goes into the neutral block first then to an earth block that's connected to the incoming cables sheath. My rather unhelpful supervisor told me to...
  3. M

    UK Earthing back to neighbours in terrace?

    Been asked to do some rewiring, and have said needs upgrade of consumer unit really Main question is regarding earthing - Zs reads at 0.45 ohms (which suggests at TNS) But cannot see where earth cable goes to from old fuseboard. There is no earth to fuse carrier or cable to fuse carrier in...
  4. N

    Cat6a cabinet earthing

    Hi all. I am replacing some cat5e cable with cat6a shielded in a large building. I have noticed the cabinets are NOT earthed and the electrical maintenance team have said they can provide this but have asked can it come from the local electrical board OR the MET. Do all cabs need to be earthed...
  5. Mark Wright

    Main Eearthing Conductor - Fabric ????

    See picture below the Main Earthing Conductor is some kind of Fabric?
  6. I

    Earthing question - TNC in Bulgaria - DIY

    Hi all, For clarity, I'm not a qualified electrician, but have a reasonable amount of experience as I've done plenty of wiring (signed off by a proper sparky) as a farm manager in the UK. I now have a house in Bulgaria which we bought some five years ago and have been slowly modernising during...
  7. S

    Australia Earthing Light Switch

    Does AS/NZS 3000 require to earth metal wall box behind switch or socket outlet?
  8. Ericsson

    Can I remove gas earthing?

    We had our gas disconnected last week and the meter removed. We need to start removing the redundant gas pipes in inside the property. There is earthing connected to the main gas pipe 1 meter after it enters the property. Can we go ahead and remove all the redundant gas pipes including the...
  9. E

    Australia Earthing Arrangements

    Minimum requirements for earthing a steel framed shed? 4x3m As3000 once again giving conflicting advice.. Incoming submain 6mm TPS 2 Core plus earth. Incoming earth with 6mm is 2.5mm. Section 5 of As3000 states that because my incoming is 6mm my earth to shed can be 2.5mm. However, minimum...
  10. K

    Earthing gas pipe warehouse

    Hi guys I am working in a warehouse where there is an inactive gas pipe and disconnected gas meter. The DB which has been upgraded now is on the other side of the warehouse. My question is does the pipe need to be bonded? Incoming metal gas pipe I believe is 28mm. Distance from that pipe to DB...
  11. Msitekkie

    Earthing the base of a metal standard lamp

    I have been asked to rewire an antique metal standard lamp. It has been rewired previously, but not earthed..! One of the screws on the base has a short length of uninsulated wire attached, presumably from the original earthing. Unfortunately there is insufficient space to run an extra earth...
  12. driverJohn

    TT earthing enquiry.

    Hi do tt earth systems highly require a rcd, and if not are upfront rcds a must in the tt earthing systems? Cheers
  13. HappyHippyDad

    Moving on to earthing and bonding at the farm!

    This thread is in relation to the job at the farm I am thinking of taking on (3 phase thread). At present the farm is all PME. I believe it needs to be TT'd as they have now brought 2 x goats in to the main barn (no other animals anywhere). In addition they have some feed for the goats and also...
  14. B

    No sign of Earthing...?

    Good morning... been called out to replace a DB on this domestic supply... no earth noticed and only bonding is 6mm from the incoming water supply... Any advice as to how to document this would be greatly appreciated.. would like to get certification correct without any guess...
  15. Q

    Substation Earthing Arrangment

    Hi All, I have a question trying to understand earthing arrangments SO, We have a DNO Substation, 4 Core armoured Feeding the Distribution Board Fed from an Auxillary Transformer (Clients) The DNO Substation has an Earthtape around the substation, which connects to the earthmat of the entire...
  16. M

    Earthing bar from MET on TNS

    Has anyone seen one of these please ? I propose a little earthing tape to identify it. I am upgrading the system and will put in place a new MET and signage. It looks like it could handle high amps on a fault. Should it therefore be deemed a pass on 3.5 of schedule of inspection ? Ps : backboard...
  17. bigspark17

    Solar metal roof earthing

    Hi all. Installing some panels on a shed roof (trapezoid) just wondering your thoughts on earthing the roof. The roof sits on the wooden structure of the building. What should i do with earthing? 1- earth bond the roof back to garage cu 2- earth bond to a local earth rod 3- no earthing
  18. O

    EV chargers and TN-C-S supply earthing general hassle

    Trying to understand why car chargers attract this earthing ballache. from what I learnt it's all about the rare times a Neutral / PEN conductor gets broken in a TN-C-S or thesedays most TN-S supplies. 1) If the PEN gets disconnected in the street, N and CPC become live making the car >70v...
  19. A

    Site Temps earthing question

    Hi Currently on a job at a hospital where we are installing temporary site supplies to canteen toilet block and office. The supply is Tncs from hospital but the hospital electrician and contractor doesn’t want us to install earth rods in case of services below ground and they’re not prepared to...
  20. newfutile

    Type of earthing system

    This states a SNE system, do I list this as a TN-S system. The heads look the same as the PME types. Our NICEIC area engineer was also not sure about this!

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