conductors

conductors

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  1. Charlie_Don't_Surf

    BS 7671 Query - Earthing of line conductors

    I'm working my way through the BS 7671 handbook and the course I've bought which accompanies the exam, in preparation for the latter. I have now come across, in a couple of places, regulations which require under some circumstances, for line conductors to be earthed. for example: "411.4.2 The...
  2. C

    Best method to calculate 4 core SWA current rating for two pairs of 1PH line conductors

    Hi, I have a Victron Multiplus-II 5kVA inverter/charger with Pylontech US5000 batteries installed in my house along with a 6.8kWp PV array and associated charge controllers. This installation has full DNO G99 approval and was installed to BS7671 and has been running great for about 18 months...
  3. A

    Insulation resistance testing live conductors to earth

    Hello all, I hope you're all keeping well. I have a question regarding insulation resistance testing. Whether doing a single circuit IR test or a global IR on an entire installation, I usually try to remove all loads, eg lamps, neons etc, but obviously this isn't always possible. So I...
  4. D

    Does the ground wire need to be the same size as current carrying conductors?

    Running #8 to AC condensor. Does the ground wire need to be #8 as well?
  5. M

    Am2s Continuity Of Protective Conductors

    In the am2s assessment where do I write the Continuity Of Protective Conductors test results? Where on the test sheet do I add the results?
  6. 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...
  7. T

    Twisted conductors in screw terminals

    Hello. When inserting two or three conductors in a screw terminal (in a socket) is it best practice to twist the ends together or not to do so?
  8. cliffed

    Main earth bonding protective conductors

    EICR recently done, Swa sub mains armouring used for cpc & MEBPC. Installed 40 years ago, water/gas/structural bonding required, these are @ 10mm Tncs earthing system @ origin which is remote from buildings 120mm tails. The sub mains vary in sizes from 25mm to 50mm….what’s your thinking on...
  9. cliffed

    Main earth protective bonding conductors

    We now have no need to MEPBC to water if proved it’s not extraneous…is anyone MEPBC metal ducting for HVAC & such.
  10. V

    Cleaning corroded conductors

    Hi, I've just completed some fault finding on a ring final, as I couldn't get continuity on the CPC, and I found most of the metal back boxes and CPC conductors were in a pretty bad state with lots of corrosion. I did a bit of cleaning up to get bare copper, and it worked enough to get...
  11. HappyHippyDad

    Joining 4 x 10mm conductors?

    This is a follow on to my kiln thread. The kiln is 3 phase but can be run on single phase. It is 12kW. It has 5 core 10mm2 flex attached to it. The colours are brown, blue, grey, black, green/yellow. I'm just looking for the best way to attach L1, L2, L3 and the single phase 10mm conductor...
  12. dokkan1080

    Continuity between live conductors

    On my cu at home I have a continuity reading between my ring final circuit and a radial circuit of 114ohms between live conductors. When I test continuity from each breaker. Why would that be? Break down of cable If I turn one off and leave the other on I don't get a voltage. At what point...
  13. I

    Noob question about non conductors

    If i put a portable water heater (wired heater element) inside a stainless kettle(not electric) filled with water. Then i plug the portable water heater to boil the water inside the kettle. Will i get electrocuted when i touch the outside of the kettle?
  14. cliffed

    The Main protective bonding conductors

    We have tables for the correct sizing of earth conductors & MPBC. We can also size cpc’s by calculation,can we actually calculate for MPBC.
  15. cliffed

    Short circuit protection on high resistance on live conductors

    Thoughts on this scenario,obviously a short circuit fault situation
  16. cliffed

    Main protective earth bonding conductors

    We are now told no bonding is required if the Water enters via plastic insert, same with the Gas.. So why are we bonding the Lighting protection conductor to the Main earth terminal bringing an extraneous conductive inside the building,when we are actually trying to prevent this happening.
  17. P

    Connecting 10/3 w/ ground conductors to existing manual generator switch?

    Hello, all. Would appreciate your guidance with a generator manual switch connect. 10/3 Romex with ground will connect a L14-30 generator inlet box to an existing generator manual switch next to my load center. The 10/3 Romex with ground has been run, the L14-30 inlet box mounted, and the...
  18. D

    Doubling over conductors in ring circuit

    Was wondering. I haven't been to college for about 3 or 4 years now and I can't seem to remember what they said about doubling over conductors in a ring circuit. So in a ring circuit using 2.5mm twin and earth cable, is it recommended that you double over the conductors before terminating them...
  19. Pretty Mouth

    Bonding conductors and their sheaths

    Hi all. I have a gas pipe to bond. The client isn't keen to have the cable run internally, so I plan to run it around the outside of the building. In conduit is one option, but will look at bit ugly IMO, so am considering clipping the 10mm direct. Anyway, it's thrown up a couple of basic...
  20. N

    What to do with unneeded NM conductors?

    I'm updating my kitchen wiring and I believe the in-ceiling ventilation fan needs to be AFCI-protected. To accomplish this electrically all I need to do is pigtail into the hot wire of one of outlets on the load side of the AFCI outlet. Can I just clip off the unused neutral and ground wires...

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