circuits

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  1. J

    Best solution to minors works certs for over 100 circuits only altered with a 2m cable from an isoltor to a plug?

    I have a situation where we have altered nearly 100 new circuits purely by adding a cable from the supplied isolator to a 3p+n plug to supply pumps. Each isolator is on its own circuit from the local DB and we need to issue certs for all these alterations, I was curious if there was a...
  2. V

    My outlet is on two circuits at once...

    I have an ancient home with knob and tube wiring, and a breaker box from the 70s. It's all a mess, with circuits powering random things on opposite ends of the house. The breaker box has breakers with multiple wires spliced or coming out of the stud and all the neutral studs are overloaded with...
  3. B

    UK Circuit design for computer circuits.

    Hi Guys, I'm currently designing an installation that will be used to configure multiple pieces of electronic equipment such as PC's, Servers, All in ones etc. Its going to be set up in bays such as the picture attached. With it being a full socket installation I was hoping for some guidance if...
  4. A

    Insulation resistance results weird on actuator circuits

    Interested in people's thoughts/experience here. I've just been testing out the insulation resistance on a 20 year old surface water pollution control facility. It has a large number of penstocks with Auma actuators. Here's the puzzle: on a few of them, the resistance - although passable - is...
  5. K

    New circuits into plastic consumer unit

    Morning everyone . Question regarding wiring of new circuits into plastic cu . I’m wiring an extension on a property soon . The consumer unit is under the stairs and it’s plastic it’s all rcbo Wylex board in good condition with a few spare ways . Probably the last of its generation before we...
  6. G

    UK Ring circuits

    Hi, I have a ring circuit for the lounge and a ring circuit for the bedrooms. One of the sockets in the lounge is fed from the bedroom ring circuit, whether for convenience of wiring I dont know. My question is, is socket fed from bedrom ring okay as it is. Reason I ask is that there is a test...
  7. D

    Distribution circuits in apartment block

    Hi all, First time poster here, albeit long time lurker. I could do with some opinions on running distribution circuits around and through the building voids of an apartment block. The project is an old police station being converted into flats. The bloke from the private DNO approved company...
  8. timhoward

    Distribution circuits in Section 705 location, RCD needed?

    I just want to check how I should be interpreting section 705. 705.411.1 states required disconnection devices, the first two indents covering final circuits and sockets, requiring 30ma and 100ma RCD's depending on rating of socket. Indent 3 says " all other circuits" need 300ma RCD. Does that...
  9. S

    High Zs on auxiliary circuits

    Hi I have a distribution board controlling conveyor belt in which all auxiliary circuits for start/stop switches, emergency buttons, etc are supplied through 230V/230V separating transformer.where secondary winding is earthed on one end. I've got high Zs readings for all those control circuits...
  10. R

    UK Powered speaker tripped circuits four times over a couple weeks, insulation tester result seems ok, need advice.

    Hello, stating I am not an electrician, I have purchased a fairly expensive set of used powered studio monitors and I’m concerned about one of them. I was switching the power switch at the back and I’ve switched it off quite poorly where it went back on itself and as it was half way between on...
    • reprobate
    • Thread
    • advice circuits couple insulation powered result seems speaker tester times tripped weeks
    • Replies: 6
    • Forum: UK Electrical Forum
  11. B

    UK Advice needed on narrow boat battery charging circuits please.

    I've been asked by a keen DIYer friend to to advise on how to wire his boat batteries when he has three potential inputs. 1. Shore mains feed 2. Boat engine 3. Two solar panels. I've drawn what I think would work but it's not my field, so advice would be appreciated. I've advised him to get a...
  12. T

    Does replacing a mains switch, which feeds an existing DB require all circuits to be tested on the DB?

    Hi Ive been tasked with replacing a mains switch, which is fed from the cutout and in turn supplies a domestic DB. It’s a BS88 switch fuse which I’ll swap like for like, but the existing DB, which is plastic will remain untouched. There will be henley blocks installed between the switch fuse...
    • Tomtom25
    • Thread
    • circuits existing feeds mains replacing require switch tested testing
    • Replies: 3
    • Forum: UK Electrical Forum
  13. S

    UK Fuseboard layout design Recommendations

    I'm after advice on how best and safely to do a friends Fuseboard upgrade. Current setup is a Wylex 6 Way board with MCBs of 2x 6A, 2x 32A and 30A Rewireable Fuse (Cooker) then from a Henley Block a Wylex 60A Switchfuse Isolator that supplies a garage DB (setup as business inside) containing...
  14. K

    One House and 2 Consumer units needed by LL, need help with circuits

    Hi I have a job where customer has two families one families lives upstairs and one family will live downstairs. As the property is going through refurbishing and rewiring is needed but LL has asked me to install two consumer units so basically divide supply using henly blocks and supply the up...
    • King84
    • Thread
    • circuits consumer consumer units help house need help needed units
    • Replies: 13
    • Forum: UK Electrical Forum
  15. O

    2 circuits in one cable.

    Strange on this, we are wiring an extension at the moment and I would like to 3 way the (currently 2 way) landing switch to the new bedroom so there is a switch near by for the stairs. The property was supposedly re-wired when the couple bought the place about eight years ago but after hearing a...
  16. S

    EICR in Flat - cross-connected circuits, T&E tails, composite earth

    I'm practising EICRs on friendly locations as I'm still in training - technically done my 2391-52 but frankly need loads more practise. I've just done an EICR on a flat and a few things that I didn't know how to code/address came up: 1) How do you code (and look for) inter-connected circuits? I...
  17. R

    Motor circuits and certification

    What tests and certification do you do for motors supplied via a motor control panel, DoL, soft starts, VSD, star delta, etc?
  18. 2

    16mm T&E cable on distrubution circuits - The 6mm CPCs are a limiting factor no?

    Hello all, I wonder if I can get some opinion on my deliberations on an old TPN installation with numerous 1P sub-boards wired up with 16mm T&E cables from a TPN distribution board. It's getting well beyond it's time for the wiring but the client (commercial) needs to eek things out for...
  19. J

    SPD on old db in house with 5 boards all other circuits no protectiob

    Hi, I’m at a job on a grade 2 listed property with 5 different single phase distribution boards, the client wants sockets moved to new locations however the circuit I’m working on has a 32a rcbo but no SPD, all other circuits have to protection either. Any advice? Thanks
  20. O

    How do I enter reports when two circuits are in one MCB

    For example the house today had two lighting T&E in the same MCB. I know it's fine, but as I test both 'radials' where and how do we enter them on an EIC/EICR form on the NICEIC online certification thing? I can make extra lines on the circuit chart, but do we write them down as MCB-8a MCB-8b...
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