conductor

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  1. 7029 dave

    DAY 3 Lightening conductor

    Another snap taken in Poland of a castle, the lightening conductor up the building (crude at that), you can see that they have bonded the iron window bars off it as well. I know this is a specialist area my knowledge is zero, your thoughts please.
  2. A

    Cable sizing earthing conductor

    Hi all, Hope you're keeping well I'm currently wiring a small commercial premises. 3 phas incoming supply, 16sq cables As it is in an urban area with a busy pedestrian street on both sides of the building I had to drive the earth rod just inside the door of the premises. However it is located...
  3. J

    Calculate the appropriate size of the protective conductor exam question

    fault = 400 A Operating time of protective conductor = 0.15 s Constant k, for the material of the conductor = 134 a 1.5mm b 2.5mm c 4.0mm d 6.0mm Just want to make sure I've got this right,
  4. BodgeJob

    Does a main protective bonding conductor require UV protection when run outside?

    Hi there, Just a quick question. Does a main protective bonding conductor require UV protection when run outside? I am under the impression that this is not a requirement as such, but if possible, it should be considered. Especially if installing a smaller sized conductor. I am running a main...
  5. F

    SWA and separate conductor as CPC

    Evening all, Having a debate with a colleague about using the SWA armouring and a separate conductor both as CPC's for a circuit. So in theory bringing down the Zs of a circuit due to using both as CPC's. I'm swaying to thinking this is wrong however, I'm struggling to find any regs to express...
  6. Mark Wright

    Main Eearthing Conductor - Fabric ????

    See picture below the Main Earthing Conductor is some kind of Fabric?
  7. P

    SPD Conductor Size Question

    Hello, I have a Leviton 51120-1 SPD connected to a residential (120/240V) 200A breaker/service main panel – The 51120 is fed from (2qty) – 20A breakers in the service panel – All wires connected to the 51120 (L1&L2 hot, neut,& ground) are 12 AWG stranded conductors – The install instructions...
  8. daybyday2k

    EMT conduit fill cable versus conductor, and receptacle for 30AMP 240.

    Hello DIYer here, Seeking advice on running a 240V 30AMP circuit to an air compressor in the shop. Roughly about 25 foot run from panel to location of compressor. Have 8/3 cable with 3/4" emt for surface mount run. Can I place the sheathed 8/3 cable inside the EMT or do conductors need to be...
  9. M

    Demista pads powered by a 24v SELV transformer, with cabinet hinge used as a conductor

    I'm working on a site in the UK where a joinery company will be installing bespoke vanity cabinets. The cabinets will have MDF/mirrored doors with a demista (heated pad) laminated between the mirror and the MDF door. The Demista is powered by a 24v SELV transformer, located behind a small panel...
  10. Shaun H

    Came across this, I was a bit confused about the insulated black conductor!!

  11. V

    Neutral Conductor Size - Main Switch to Neutral Bar

    Don't come across this very often - but I've had a CU delivered for a caravan job (not static btw), and it's been supplied with a neutral conductor from the main switch to the neutral bar! Definitely an oversight, but I've got plenty of singles cable in stock, so rather than send it back, I...
  12. M

    UK Selecting bonding conductor size

    This is a question (or discussion probably) regarding selecting the main earthing conductor, and subsequently the main equipotential bonding conductor sizes in a TNCS installation. We are fitting a replacement consumer unit only. The property currently has 4mm bonding cable installed to gas and...
  13. Aaron b

    Swapping solid conductor in lewden board for flex

    Hello, I've worked on a few old lewden boards recently and the quality is terrible. When fitting rcbos in 16th edition boards there's a solid bar that gets in the way of the taller device and they go in wonky enough as is. I was considering swapping it for a 100A flexible link, are any of you...
  14. S

    Suspected Broken PEN conductor on TNC-S system

    Hello everyone, I’m based in the ROI and live in a rural location. Yesterday evening my electricity supply started to switch on and off randomly. After waiting for the evening for it to come back on it still has not. I checked my neighbors who are on the same DSO as my house and they all have...
  15. Neptune

    Insulation resistance test on a damaged conductor

    I have a 2 metre T&E cable. I applied a IR test (500v) across P and N to E with the other end of the cable safely sitting on the floor and it reported the meter maximum. As expected. I then completely cut through the N conductor on the cable and repeated the test. It still reports the meter...
    • Neptune
    • Thread
    • conductor damaged insulation insulation resistance insulation resistance test resistance test
    • Replies: 21
    • Forum: UK Electrical Forum
  16. Yp510n

    continuity test on a protective bonding conductor

    Hope i find someone who can help me with this one. I have this question on an exam: A continuity test on a protective bonding conductor gives a result of 15ohms. What possible reasons for the result and what actions (if any) that should be taken? My answers where: -wrong size conductor shows...
  17. J

    Electrical size conductors and conductor rating

    Hello, I’m building a wood shop. I’m planning on installing 240 and 120 outlets. I plan to connect to my supply panel using a 90 amp breaker. They’re run to the shop is 140 feet. I will use 2” underground conduit. I’m just not sure what size and what rated copper conductors to use. I used...
  18. D

    Decomissioned gas pipe as a bonding conductor?

    What do you guys think about using decommissioned gas pipe which is welded throughout and 4" industrial in steel. I am clear on regs that say you cannot utilise a gas, oil or water pipe as a bonding conductor but this would effectively safe a lot of time and money.
  19. I

    No continuity of neutral conductor

    On the sockets ring. What you advise, go round all sockets? Checking netruals
  20. dokkan1080

    Main Earthing conductor max resistance?

    I know main bonding to water and gas need to be 0.05 ohms But what about the main earthing conductor? Does it have a maximum resistance value from MET to the CU?
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