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feeding

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  1. B

    Swa armour feeding TT system

    I have installed a TT system at my garage, and it is fed via 10mm 2 core armoured cable, does the armour of the cable have to be earthed via the supply tncs side or can it be glanded and earthed the garage side (TT). Anyone know the regs ? Thanks
  2. R

    Sy feeding school boilers.

    What is people’s views on using SY cable? I’m not keen on using it for fixed wiring.
  3. M

    32A MCB feeding 1.5mm & 2.5mm T&E cables via 30A terminal block

    Quickie - Would you say this is ok? 32A MCB feeding 6mm T&E which is then connected to a 2.5mm T&E & 1.5mm T&E cable via a 30A terminal block in plastic terminal block housing buried in stud wall. The 2.5mm feeds a 3kW immersion heater with 13A SFU at the heater end. The 1.5mm feeds gas boiler...
  4. L

    Feeding 250 amp 3 phase board direct from buzz bar need isolatir

    I'm working in a warehouse and replacing the old fuse boards with a new 3 phase board. The board will be sitting directly above the buzz bar im not sure if I need to put in an isolator in between them to isolate the 3 phase board? Thx
  5. W

    Power factor unit

    hi Looking for abit of advice? We are quoting to replace some SWA cabling feeding various sub boards. I have an ABB power factor correction module in place, this is feeding a control panel in the plant room, feeding motors and ventilation equipment We need to replace the 2 x 150mm 4 core...
  6. D

    Feeding new 2 way board from 32a MCB

    Hi all, OK, so was sent to a job today for upgrading a kitchen. The existing mains was an older MEM board which the newer Eaton RCBO's wont fit. The only circuits being amended are the kitchen ring main (32 amp) and the lighting circuit (5 amp). The customer would not have been keen on...
  7. M

    PME to remote domestic dwelling

    Hi guys, thoughts on this would be appreciated. I have a 3 phase 100 amp PME supply, feeding 3 domestic dwelling about 80 mts away. Done cable calc and have chosen 50mm 4 core swa using armour to protect cable. In the 1st dwelling I have 3 phase metal DB feeding 3 sub mains, 1 to 1st & 2nd...
  8. M

    Rcd query.........??

    Hi Guys, does anybody know what the fundemental difference is between a type 1 rcd in relation to a normal domestic type to bs 61008. These have been mentioned for supplies to electric vehicle chargers....? Many thanks in advance ))
  9. L

    3 core feeding 2 lighting circuits sharing a neutral

    Hi can any one help please doin some work on a house and one of the problems on the test report is there's a 3 core feeding 2 breakers ( red feeding downstairs lights and yellow feeding upstairs lights) and only the one nuetral. Now if I could rewire it I would cables concreted into the floor...
  10. 2

    RCDs tripping feeding Megaflo heating elements

    Got 2 32A RCDs in a CU, each one feeding a respective Megaflo water heater circuit. At the Megaflo each stat head is wired back through a timer and onto a fused spur. RCD is tripping straight away with cables connected to the stat and stat into element. Dissconnect stat from element and it...
  11. M

    Mid position valve and underfloor heating

    Hi all, just installed a polypipe under floor heating system to an existing Y plan, the valve is a V4073A,with this system the UFH stat should independently operate the UFHeating from the existing central heating, the snag is with the time clock off and the UFHeating stat on both the UFH & the...
  12. G

    Eicr remedials

    Main switch 160a bs88fuses, 35mm tails feeding busbar chamber with switch fuses ontop feeding distribution boards. A c2 has been given to undersized main tails. I thought that because the tails are only about 400mm long from switch into busbar that it was ok? Thoughts?
  13. R

    generator feeding a UPS

    In a set up where a generator is feeding a ups unit on power failure, is the earth used from the board feeding the UPS or does the genny need an earth electrode, also what about the neutral earth reference is mains neutral in the changeover never broken.
  14. P

    100 A MCCB feeding DB with various RCBO's tripping before they do?

    Hi I have a problem on a site that I have inherited. The fault is that a 100A MCCB is tripping indeterminately. The MCCB feeds a DB which has several cct’s none any higher than 32A and all cct’s are RCBO’s the RCBO’s are not tripping yet the MCCB is. The MCCB has been changed recently...
  15. D

    Economy 7 Board

    My Son has just moved into a flat with 2 storage heaters on economy 7. The CU is an older MK sentry one with 2 incomers fed from separate feeds from the meter, 1 permanent, 1 for economy 7. There are no RCDs which is not ideal. Options for rectifying that as I see it are: Replace current setup...
  16. F

    dasy chaining boards ?

    a big hotel group has asked us that they want 2 way dbs in each bedroom feeding one socket and 5 lights all led fittings, but they want the supplies to boards daisy chained from 10mm t&e or swa feeding 4 rooms per circuit. the only way ive ever done this is sub per board, but cant find anything...
  17. sibbits

    4 core swa feeding ring

    just wondering what other people think of wiring leg out to a ring in a single swa 4core 2.5 using the armoring as the earth? its about 10 mtrs from the board and wouldnt have massive loading on the end. i know that using 2 seperate pieces is best but i have a piece of 4 core long enough...
  18. S

    Two Circuits feeding 2G switch

    Hi all, I am struggling to get a definate answer on this one, and wondered if any of you know the truth of this please (with the relevant source data if possible): Lets say we have two circuits as follow (both sharing a common RCD): Circuit 1 - Downstairs lights - fed from a B6 MCB Circuit 2...
  19. S

    Feeding a sub main

    Hi all, I have been asked by a friend to quote for a new consumer unit and additional sockets in his home, all pretty bog standard. However, he is having the original brick built sheds to the outside of his house turned into an bathroom and passage way. He wants sockets and lights inside the...
  20. S

    Odd question re feeding in

    Hi just something Im trying to ponder in my head - if a house has Solar (PV) feeding into a CU, and the CU has 12 odd circuits (on RCBOs), and one of them has a N-E fault, as in, a dead short, would this mean that the energy fed back into the grid via this CU would ...feed back in? surely...

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