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copper

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  1. E

    Aluminium Cables - Copper Busbar

    Hi All... i have a little question... We have Aluminium DC cables connecting onto Copper Busbars, but we car starting to get burning/galvanic oxidation. (the Large combiners are outside in metal cabinets so easily get moisture inside) But some of it is due to the odd poor connection (lugs...
  2. R

    Plastic Water main with copper throughout.

    Was called to a job yesterday where a company had completed an EICR on a house fed via a plastic water main with internal plumbing done completely in copper. They had put a c2 observation code for a lack of main protective bonding to the water. The customer had shown me the EIC cert she had...
  3. K

    Copper equivalent to SWA armour

    Ive got a copy of this table, but not sure where it was derived from?? Has anybody else seen/used this table??
  4. L

    exposed copper in meter tails. HELP

    We have been pulled on our work for fitting tails into an electric meter which has copper exposed by about 2mm max. Is there any regulations regarding exposed copper and their maximum length in and out of electric meters which are placed in an securely sealed enclosure. I am asking this because...
  5. Worcester

    Solar Thermal Maintenance Visits - What do you charge?

    We're getting a lot of requests to carry out maintenance visits on Solar Thermal systems - interestingly they are mostly Worcester Bosch systems and all are with soldered joints, and every single one has at least 3 other elements not compliant with current standards above and beyond the solder...
  6. S

    Jib photo countersign

    Alrite lads, does anyone know if my supervisor can countersign my photo for my jib gold card? Cheers
  7. P

    New switch no COM connection

    Hi, I have a double switch in the hall, one switch turns the upstairs/landing lights on and off and the other switch turns the hall light on/off. Obviously there is a single switch upstairs to turn the upstairs landing lights on/off. I've bought a new switch but there is no COM connection in...
  8. L

    Main bonding at outbuilding

    Hi all, I have a commercial premises (school) that requires installation of main bonding at a block which is an outbuilding from the main school. Now the bonding in the main school is 50mm, however the cable feeding this outbuilding is just a 25mm 4core. So what size should I be using...
  9. M

    3 core t+e giving 45 volts when off

    I have a 3 core t+e on a 2 way switch and when it is turned off there is still 45 volts at the light. I have stripped this down to a 1 way switch and the voltage disappears. I then meggered the 3 core and it is clear. There is continuity through the conductors and no obvious fault with the...
  10. J

    Scrap prices on copper?

    Just wondering what the prices were on scrap got 1 black bag full of clean copper, 16mm earth, 6mm t&e and 2.5mm t&e and then 3 more bags full of dirty copper containing 6mm t&e and 2.5 t&e wondering how much I'd get for it
  11. P

    Outbuilding Submain

    An outbuilding is fed from a separate single way board in the house and has a 2c 4mm SWA to the building of 7m. Its a TNS. This outbuilding has its own water main (albeit in plastic) which comes directly from the water meter not through the house. Testing between copper pipes below the sink and...
  12. i=p/u

    Copper = weight

    Can anyone tell me what 1m of 50mm copper = in weight or the sum to work it out, no scales here
  13. S

    joining aluminium to copper

    I've not had the experience but I've seen a couple of glimpses of aluminium conductors joined to copper. This was on to busbars and main mccb terminals etc. They'd used lugs I'd never seen before, they also looked to have had a compound or paste in them. Does anyone know much about this...
  14. P

    Copper resistance question

    Hi all, I've got the 2394 written tomoz. Passed the gola and practical. Just trying to do little brush up. Got this question in a book.. A ring circuit is 54 metres long and wired in 2.5/1.5 thermoplastic cable 32 amp type c device. Ze is 0.24. The resistance of 2.5mm copper is 7.41mohms per...
  15. O

    Copper lug crimper?

    Looking for a copper lug crimper at a reasonable price, but no idea whats the best value for money? Have a an insulated (red, blue, yellow) crimper already, but could do with an uninsulated copper lug crimper Any best buys? Or ones to avoid like the plague? Thanks in advance.
  16. I

    trunking earth links

    are copper earth links on trunking compulsory , or in the regs book
  17. eNigMar

    Resistance/meter for copper conductors table

    I've been looking over the table in GN3 for the resistance of copper conductors per meter and there is something causing a form of OCD to manifest in me 'ead. It's obvious that if you double the length of a conductor it will double in resistance and if you halve it, it will halve in...
  18. M

    scrap copper

    Hi chaps any one know price of scrap copper around north west cheers
  19. D

    copper earth wires blackened

    Checking some sockets in a domestic residance the earth wire was bare copper (no sleeving). The bare copper earth wire was all blackened as if it had been heated . Inspected all sockets and found that all socket earth wires were unsleeved and blackened. The installation wiring was around 20 yrs...
  20. R

    Bonding to a copper bath

    House has 17th ed board. Bonding in place. Do i need to bond the bath. What testing would you recommend

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