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copper

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  1. La Poste

    Mystery of the copper thieves who only strike on Thursdays

    For the residents of a tiny village in Cambridgeshire, Thursdays have become a day to dread as thieves descend under the cover of darkness to steal copper phone lines, leaving hundreds of homes disconnected. BT workers spend days replacing stolen cable, only for the criminals to return a few...
  2. T

    22mm copper tube

    Where is the best place to buy 22mm copper tube? Also is anyone having a clear out? I am after approx 100 22mm pipe clips Cheers
  3. Z

    Learner query on resistance tables for copper conductors and resistivity

    Hi everyone Table A.1 in Guidance Note 3 shows various values of resistance/metre for copper conductors at ambient temperature, including e.g: 18.10 milliohms/metre for one 1mm sq. conductor 0.387 milliohms/metre for one 50mm sq. conductor But these given values of resistance do not exactly...
  4. G

    Copper Thieves....again....

    Firefighters' Lucky Escape As House Explodes - Yahoo! News Sounds like a PME network with a section of PEN removed.......
  5. P

    another load of idiots stealing copper

    this time some innocents were very lucky to be alive. my cousin lives in the street next to the houses and he was lets just say least impressed when he got woken up. BBC News - Castleford explosion: Copper cabling theft linked to incident
  6. C

    Current carrying capacities and vold drop for copper conductors

    Hi Help please with the above. Using on site guide Im stuck on Cc as I cant find rating factor for 42A type B breaker or is it 1? Many thanks Cider
  7. F

    Learnin multiple trades ?

    As some of you know i want to become an Electrician. But is it worth learning another trade aswell to increase my opportunities ? Thanks.
  8. M

    Copper Testing.......What is it or has the relevant person got it wrong?

    Been offered a PTS shift this Sunday to do some copper testing at a small train station near where I live. The only thing I can find on copper testing is what the doctor checks for..........lol Does anyone have any idea or give me a heads up of what to expect? Or has the bloke got it completely...
  9. D

    Rubber insulated tinned copper value??

    Does anyone know how much this tinned copper weighs in at the scrappies???
  10. R

    10mm bonding to copper and plastic install.

    Im going to be doing a consumer unit change. There is already 10mm boding to gas and water pipes. However the customer has has some renovation work done to the plumbing. So it starts off copper and then goes to plastic and then goes back to copper. Am i right in thinking i need to take a...
  11. D

    Aluminum or copper tin?

    Did an PIR today. Not come across alu before and wondered if there were any tell, tell signs between alu and copper tin? Was alu coloured and seemed different to work with than copper but not 100%. Wouldn't say it was brittle to work with like you might expect with alu. 1930's 3 bed updated...
  12. R

    Earthing water. Part plastic, part copper

    On the job I'm at, there is a plastic incoming water main, with a plastic pipe taken from it on the consumer side. The plastic runs up into a bathroom and copper pipe is taken off it to supply the bathroom. The plastic pipe carries on up into the loft which i then assume feeds more copper...
  13. A

    Calculating the voltage drop across a PVC insulated cable- 35mm copper conductor

    I am adding a new Air handler panel to a building and its load is 5421KVA. How do I go about getting the the start up current when the phase voltage is 240V? On obtaining the Start up current, now how do I calculate the voltage drop when the cable that I am thinking about using is the 35mm sq...
  14. A

    bonding to shower in pre-fab offices

    Hello all, Recently tested some office accomadation units for a building site (the type that come as individual bays with own db and then get bolted together to form an open plan office and all db's for each bay run back to a main db for each floor). One area had four showers supplied from...
  15. P

    price of copper

    went to the scrappers yesterday. £5200 for clean stripped copper per ton :eek: wish i had a van load to take down
  16. F

    How would you setup the earths on this kind of install?

    Hi, I'm installing complete systems for a small development of 11 flats and would like to know what the recommended way to setup the earthing arrangement. This is what I'm doing and what we have: In the hallway on the ground floor there is a newly installed Lucy head (I think thats what you...
  17. S

    Main Protective Bonding Of Plastic Installations

    As the original thread by sjm got hijacked i have reposted it: "Hi guys. Quick question and just looking for your opinions. If you had a main water supply pipe of plastic, for at least 20 mtrs underground, and a complete plastic pipe installation within the property would you require a small...
  18. Amp David

    Isolation valves for 15mm copper pipe

    Just wanting to know what size the thread is on one of these valves. Its the type of valve you turn with a flat blade screwdriver to turn on and off. When I say the thread, I'm on about the compression nut
  19. Paul.M

    theft of copper cable

    On the BBC this morning reported that the theft of copper cable nation wide due to increased prices at the scappers (around £4000 per ton). It showed young men pushing full reels of multi core hv cable from business yards and also from railway tracks that are still energized. I know times are...
  20. D

    FREE Electrical Software from the Copper Development Association

    The programs listed below can be found here; Publications and Software Catalogue D10 Energy Efficient Power Cable Selection (Datadisk) This program calculates cable size taking account of type of cable, installation method, circuit length, overload protection, ambient temperature and circuit...

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