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circuits

  1. W

    Cooker circuits fusing down ???

    Hello I’ve pulled out a electric oven and the connection plate at the back for the cooker circuit has 2.5mm hardwired to the 6mm circuit for a 1.76kw load and also a 6mm connecting a induction hob,unknown load. Does the 2.5mm need to be fused down or is it okay being spurred off the cooker...
  2. kingeri

    Domestic 10mA RCD for bathroom circuits

    Been to look at a job this morning for a CU change, customer the type who wants to have his say on every tiny detail. He has already bought the CU as well, a Wylex RCBO unit..... I pointed out that the RCBO ratings he has bought don't align with what I actually need...and that some will need...
  3. Z

    I never install ring circuits, the potential for danger is unacceptable

    I’d like to know if anyone else here refuses to install ring circuits in domestic premises. For me it’s either a 20a radial / tree circuit with 2.5mm, or a 32 radial / tree circuit with 4.0mm. Frankly I’m tired of finding broken ring circuits on 32a CB’s, as well as mismatches on end to end...
  4. E

    Bunches up lighting circuits

    Good morning all! Currently carrying out an EICR on a commercial property and have noticed 8 lighting circuits bunched into 2 MCB’s. 0-EE74-FE0-F729-4048-A7-F4-2979-EBDFD688 - https://ibb.co/hCTKpsC No real danger but not very practical as nuisance tripping could occur and the labelling is a...
  5. S

    Supply and final circuits for stables.

    Hi all, just looking for advice prior to a potential upcoming project supply stables for horses. The supply characteristics into the main house is TNCS and the stables are located approx 40m away from the building. I am thinking of putting a 1w non-rcd protected consumer unit at supply end...
  6. T

    EICR every 3 years for EM light circuits

    Evening all Got an email from a prison we do work at who said they have been told that any circuits that contain emergency lights need to periodically tested every 3 years on top of the 5 yearly test. I have looked through the IET but cant see any info on it? Can anyone point me in the right...
  7. T

    New circuits wired into a plastic consumer unit

    Had to install a ring main & cooker circuit for a new kitchen we have been doing. The consumer unit is hager split load but is plastic. There is no room in the cupboard to add another board and the customers dont want to pay for a board change. I guess i could just note on the form saying...
  8. H

    How to test a circuits in steel conduit as the cpc

    Good evening I am currently a training to become an electrician. I do hold both initial verification and periodic testing qualifications however this is an issue I have never personally had to deal with and was never mentioned on any of my courses as often seems to be the case. Basically I am...
  9. spud1

    What if a circuits Max Zs is exceeded but the circuit is protected by an RCD?

    Just processing an EICR and noticed a couple of final circuits measured Zs values (fed from a sub distribution board) slightly exceed the Max permitted Zs values for the OCPDs that protect them. Obviously I will note this as a design flaw in the observations, but I just wondered, from the...
  10. C

    Additional CU in Garage for Two Circuits?

    Hi We live in a new build (2015) and the developer added Power and Lighting to the garage via a double socket (spur from house) and then a single light coming off the socket (via FS) for the garage. I then added another driveway floodlight off another FS. Anyway, we plan to do some garden work...
  11. J

    1x swa to do 2x circuits

    Looked at a job for a old boy- and wanted to keep costs down for him and make my job bit neater/simplier Job is to get new swa from new little rcbo board inside house to a external ip65 light switch and then into 6x external lights then he also wants to power his little shed at end of garden...
  12. Morris19911

    Shower and cooker circuits

    Hello I'm an apprentice but don't do any domestic work just commercial and industrial atm. My question is if you don't have a design current for shower or cooker e.g. customer doesn't know what they are buying yet, how do you select your cable sizes and mcb rating? This is purely for learning...
  13. W

    Two ovens - how many circuits?

    I'm planning to get two single ovens and have been trying to find the best way to do the circuits. People seem to do it every way possible but I have doubts about some of the ways that they are done. The ovens I'm looking at are 16A appliances (max power is approx 14A), so I won't be plugging...
  14. J

    Timers on LED Lighting Circuits

    Given the demand for low energy lighting in new build/major extensions it seems that the LED technology leads the supporting equipment such as dimmers and timers. The problem I have is that a client wants to put all the lights on each of four circuits on a 24/7 timer for security purposes (each...
  15. Marti

    Random RCD trip & interconnected circuits. Suggestions appreciated.

    Hi There, I was called out to a house RCD trip which would not reset. An old style 10 way split board with a single 30 ma RCD (half without RCD protection). RCD checks out fine but I found a faulty chandelier & replaced it with a single bulb for now. Also a faulty 12v transformer flickering; now...
  16. Andy5678

    Adding RCD protection to existing circuits

    Here’s a commercial scenario for you to comment on over you nightly dram. So there is an existing consumer unit with older style MCBs or bs88 fuses. RCBOs cannot be added to existing and customer wont pay for a new consumer unit. My soloution is to add a garage unit onto the side. Remove...
  17. J

    Best way to add Garage circuits

    Hi, I am a keen DIYer (dangerous phrase - I know) but will NOT be doing this work myself and will be getting a local sparky (Part P etc) in. However I'd like some advice as I want to check its the best way of doing things. I have a Tenby split load Consumer Unit (circa 2005) in the Garage with...
  18. Paul Langham

    Wiring 2 lighting circuits using one 6 terminal junction box

    Hi there, my name is Paul and I'm currently studying towards a city and guilds level 2 electrical installation, we are currently on lighting circuits for our practical, we have been given a task to wire up 2 lighting circuits using a 6 terminal hager junction box, I'm ok with wiring one circuit...
  19. 7

    Cooker circuit options

    Just finishing a rewire, customer not sure on hob and cooker at design stage so I went for 2 circuits with 6mm withe 2 32amp rcbo's. Hob and cooker 5 meters apart. Now induction hob and oven have arrived onsite and both suggest a 13amp supply is suffice. Should I downgrade the rcbo's to...
  20. Archy Styrigg

    Two 'Circuits' in one MCB

    Can't find the recent thread about this, but I've been looking at smoke detectors and got this from AICO under System Installation: "• The supply for the mains powered alarms shall be taken from an electrically protected, regularly used local lighting circuit at the nearest source except for...
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