circuits

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  1. 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...
  2. 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.
  3. 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.
  4. 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...
  5. 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...
  6. 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...
  7. 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...
  8. 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
  9. 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...
  10. 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
  11. 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...
  12. 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...
  13. 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...
  14. P

    Two or more circuits in a junction box (521.8.3)

    When looking up a reference on another thread I noticed rule 521.8.3 that says "Where two or more circuits are terminated in a single junction box this shall comply with BS EN 60670-22" and it got me wondering what BS EN 60670-22 actually says that has an implication for two or more circuits...
  15. P

    UK Lighting circuits

    Just interested to know the most common method of wiring lighting circuits. My dad always went down the JB route. I prefer looping in/out at the ceiling rose, but am finding many are now looping from switch to switch. Any thoughts chaps?
  16. N

    Correct grounding of metal junction box w/splices for 3 circuits

    I have 3 circuits (microwave, disposal, and dishwasher) entering a metal box where the THHN wire will be spliced to Romex. I spent half an hour reading 2020 NEC Article 250 but didn't see multiple circuits specifically addressed. To ground the box do I just need to pigtail off of one circuit's...
  17. J

    C&GLevel 2365 - mock circuits

    Hey everyone, I'm looking to start the city and guilds level 2 2365 course soon (home study). And just wondering what circuits I will be required to build. I've seen plenty of these GSH YouTube videos where the students have mocked up circuits on sheets of OSB so I wanna get practicing for the...
  18. Devil7

    Sub mains / distribution circuits

    Hi all, new here, just looking for a few pointers. I'm not doing this, just keeping my brain active in these weird times with things i've not learnt yet. How do you calculate cables etc for a single phase sub main (to a garage for instance) - is it the same as a cooker? Ib> In> etc etc?? TIA
  19. D

    How is this switch powered? I thought all circuits needed a neutral?

    Usual problem with smart switches - no neutral at the switch, been plenty of threads on it before. Fortunately managed to find some switches that don't need one. So the circuit's permanently 'complete' since the switch is permanently 'on', and actually power is going to the light, but not...
  20. I

    Borrowed neutral / RCD trips but circuits still live ?!

    I’m just a homeowner, so please forgive me if my question sounds stupid .... i think the lights in the hall of my small bungalow are using a borrowed neutral. I recently went to fit a new light on the ceiling in the hall using the existing connections and turned off the MCB that said “Hall...
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