circuits

  1. J

    Prospective fault at the end of circuits

    Does anyone perform a prospective short circuit and, where no RCD / RCCBO, a prospective Fault Current test on the end of circuits on inspection and tests? I get we do ZS, but how do we know that the CPC or Line conductors are man enough for fault currents of X duration? S2K2 => I2 T? Cheers...
  2. N

    Bathroom circuits

    Hello: I am a DIYer and have specific question on bathroom circuits. I removed a jacuzzi in master bath which was tied to its own individual 20a GFCI breaker in panel box. Same bathroom has two additional circuits: 1 for lights (including ceiling fan) and one for GFCI outlets. I would like...
  3. M

    Multiple GFCI Outlets Tripping at the same time on different circuits

    Dealing with a noodle scratcher. Trying to figure out what has caused multiple GFCI outlets on separate circuits to trip at the same time. Over the last two Wednesdays in the morning something has happened which caused multiple GFCI outlets throughout the house to trip at the same time...
  4. D

    Circuits for white goods

    Hello everybody! I just wanted to ask, what would be the best practise to run circuits for white goods? In my plan what i see is: 1. Fridge & Freezer 20 amp RCBO radial wired with 2.5mm 2.Washing machine 20 amp MCB Radial 2.5mm 3. dish washer 20 amp mcb radial with 2.5mm 4. Washing machine and...
  5. B

    Time needed to test consumer unit circuits?

    Hello, how much time is needed to test consumer unit circuits before re-connection to the mains? Is each circuit a 5 or 10 minute job?
  6. W

    new circuits onto an AMD3 board with RCBO's - ref 18th ed?

    Hi, I am planning a house extension and will need to add 3 more circuits to my existing board. My current set-up is a metal CU with all circuits on RCBO's. Will I be able to add circuits to this board under 18th Ed or will i need a board swap to make room for all the extra surplus surge...
  7. H

    EICR unsatisfactory due to 'no RCD protection to lighting circuits'

    Hello everyone I have a 1996 2 bedroom house which I'm about to let out as I lost my job due to COVID and need to relocate. The NICEIC electrician I used for my EICR has given me a code C2 for 'no RCD protection to lighting circuits including bathroom lighting'. To put this right, he's...
  8. J

    Wagos on Final Ring Circuits

    In a ring if there is a 30A screw terminal junction box in the ring one spur can be taken off this. The j box terminals have three cables in them. Each cable in a Wago (or an in-Sure) has it own connection slot for each wire. This makes a difference. Wagos are mini bus bars. If a 32A four...
  9. J

    Software for drawing circuits

    Is anyone able to recommend a website or software for drawing out wiring circuits? In my case, it would be for an intercom system. Nothing overly complex. Just want to be able to drag and drop connections etc so I can share with other professionals.
  10. DaveW4

    Circuits identification

    Hi. Is there an industry-specific way of identifying circuits or do you just give them id's yourself. Apologies for the basic question, I can't find the trainee forum.
  11. D

    Can I switch 3 lighting circuits using 1 switch with only 1 live feed

    Hi All I have around 30 garden lights which turn on and off with one switch in the house. The problem is, if water gets in one light it a) stops all lights working and b) requires troubleshooting 30 lights to find the problem. Therefore, I was planning to have a second distribution board...
  12. A

    Testing high level lighting circuits

    Good morning everyone, I have been asked to do the initial verification on a newly completed building. so all the light fittings have been installed, false ceilings have been closed off,..etc. what is your suggestion for testing the lighting circuits?( continuity, IR tests) some of them are at...
  13. L

    Submains/distribution circuits on block of flats

    Hi all....I’ve got a block of flats I’m doing the M&E on. It’s just design stages atm and there is a basement where the central boiler system and switch room is going. The problem I’m having here is that this is the far left hand side of the building and the riser is pretty central. Far from...
  14. P

    Incomplete ring circuits?

    The recent click-bait thread on radial vs ring final circuit descended in to the usual arguments ranging from sane to near-religious, but one issue that was raised among the general noise is the risk of a ring with an open somewhere. So I wondered if the folk on here that do many EICR and...
  15. mak

    Is there a max Zs for lighting circuits?

    I can't find anything related to this in the regs so I probably misunderstood the question. The way I see it the max Zs for any lighting circuit depends on the circuit breaker for that circuit. Say we have a lighting circuit with 100x36W ceiling lights which gives us a load of 16A, we choose the...
    • mak
    • Thread
    • circuit circuits confused earth fault impedance lighting loop loop impedance max radial types
    • Replies: 7
    • Forum: UK Electrical Forum
  16. EricMark

    Isolated circuits and the EICR are they included?

    If some one drops tails or locks off a circuit for any reason, be it faulty or simply not used, is it tested or reported on an EICR? In other words if a landlord knows a circuit would get a C1 or C2 and he decommissions it before the test then recommissions it after is there something we should...
  17. EastCoastPete

    Lead sheathed 2 core lighting circuits /EIC

    Evening All, I'm changing a CU from rewirable to 6 x RCBO in a Victorian flat. The two lighting circuits are lead sheathed 2 core, they appear physically undamaged though I've yet to test them but is this an automatic EIC fail? The switches and pendants are all plastic. Thanks for any pointers, Pete
  18. D

    EICR Certificate not issued. Not all circuits RCD protected rated C2

    Hello, I've recently had an EICR done on my 2 bed house which is a residential let. This house is about 25 years old built by Charles Church. The EICR has not been issued due do C2's, there were no C1's Email with C2s ratings for 1) Not all circuits RCD protected, 2) Bathroom light is a bare...
  19. N

    New Circuits from a shed DB

    Hi guys, I'd appreciate the opportunity to pick your brains a bit, and make sure I'm on the right track, please. (Will also be talking to my course tutor) I'm currently studying for my NVQ lvl 3, and an opportunity has come up for me to do work which may be good for my portfolio. I'm a...
  20. L

    Domestic heat/smoke alarm mains powered from different lighting circuits?

    Hi folks, Friend is currently renovating his house, including a loft conversion. He had originally hoped to go with Grade F1 (tamper proof batteries) radio interlinked alarms. However architect has stipulated all alarms must be Grade D (mains powered with battery back-up), but can be still be...
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