circuit

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  1. I

    Extent of schedule of test results for new circuit in DB

    Hello, I am in the process of training to be an electrician and have a question. When filling out a EIC for a new circuit am I required to test all the other circuits in the board as part of the schedule of test results or only circuits I have installed/altered when completing? If just my new...
  2. T

    Wiring Emergency Lights With Normal Lights on the same Circuit?

    Hey Everyone, Currently at work I've been tasked with wiring the emergency lights. As I've never done it before, and my foreman wants me to learn how to do it. It's wired in a way he's not familiar with, but he eventually got his head around it. It's maintained em lights wired with normal...
  3. G

    8/3 for a 50amp rv circuit?

    I have a chance to pick up 50ft of 8/3 for $100. What's the risk of using this for my RV, 50 amp circuit? Here's the deal though. I have no plans to live in this RV. I just want to run the refrigerator and keep the batteries charged. Maybe run one A/C if I'm working in it. Never use a hair...
  4. Lainan01

    Maximum Zs on circuit protected by RCD - 1667?

    Does a RCBO protecting a single circuit mean it can have a maximum Zs of 1667 Ohms since it's being used as fault protection?
  5. S

    How to co-ordinate circuit breakers trip for overload and short circuit?

    Can 50A B type circuit breaker be coordinated with upstream 50A C type circuit breaker to trip earlier on shorts and current overloads?
    • SparkyAus
    • Thread
    • ausie elec breakers circuit circuit breakers how to overload short short circuit trip
    • Replies: 1
    • Forum: Australia
  6. S

    Fuse to Circuit Breaker Equivalence

    Replace of 45amp Fuse with 50amp CB on 10mm2 cable? Is this okay because of the 0.9 derating of fuse to overloads and because 10mm2 can handle 50Amp current. Installation in air equivalent double brick unit?
    • SparkyAus
    • Thread
    • ausie elec breaker circuit circuit breaker fuse
    • Replies: 5
    • Forum: Australia
  7. M

    Bathroom fan: do UK regs require connecting via lighting circuit?

    Hi, I've just had some electrical work completed in the bathroom; I've recently refurbished the bathroom, replacing the old electric shower with a mains/mixer. I had bought an inline fan and a separate humidistat/run-on timer module with the idea that it could be installed using the old...
  8. D

    LED lighting Mains and 12volt DC on same circuit

    Hello I have recently moved home and I looking to upgrade lighting across the house to LED. In the kitchen I have found that there is installed a mains powered lighting circuit which serves five LED lamps (surface mounted and recessed) Included within the same circuit is a junction box into...
  9. J

    Re-wiring socket circuit certificate

    I’m level 3 qualified electrician been doing for couple of years still training for my nvq and 18th I work for a company where I change db full house rewires very competent in my work just need to know would I be able to certificate my own works or need to wait till I’m full qualified as I’ve...
  10. R

    Boiler, programmer etc. via immersion heater circuit?

    Can I supply my central heating (programmer, two port valves and boiler) via a fused spur taken from the immersion heater circuit? They’re currently supplied from a fused spur taken off the ring main; however, kitchen wall’s are being moved around. There is nothing else on the immersion...
  11. J

    Could somebody please tell me what the name of the below circuit is please

    Hi all, does anybody know the name of this circuit and how it operates and the purpose of each component please? any help is much appreciated. Thanks in advance
  12. LukeL81

    Circuit Design - HMO refurb

    Hi Pretty new here, so not sure if this question goes into this thread I am not an electrician; however, I plan to integrate IOT devices and smart energy meters into the electricals of a house of multiple occupancies. The house will have six bedrooms, 2 on the ground floor and 4 on the first...
  13. J

    Could somebody please tell me what the name of the below circuit is please

    Hi all, does anybody know the name of this circuit and how it operates and the purpose of each component please? any help is much appreciated. Thanks in advance
  14. J

    Could somebody please help me understand this circuit?

    Could someone please explain to me what this circuit is used for? I believe it is a full wave bridge rectifier but I'm unsure as to what the zener diode is used for in this arrangement? Thanks in advance
  15. E

    EIC additional circuit main switch/switch-fuse/circuit breaker/RCD

    When doing an EIC for an additional circuit (which only covers that circuit), does the 'main switch/switch-fuse/circuit-breaker/RCD' section refer to: a) the MCB you're adding for the new circuit b) the existing main switch (whatever it is) for that board c) [if the DB the circuit is added to is...
  16. S

    Choosing the correct circuit breaker value

    Hello. So, I would like to know how I can choose the correct circuit breaker value when doing a new installation. My example is: I have 16 rooms. Each room has its own electrical board (main breaker is a 220v, 32A, a lighting cb and one for socket outlets) I want to add a LV switchboard or a...
  17. W

    What type of circuit breaker would be used for a three phase circuit?

    Hi , Currently doing a design project in college and I need to pick a circuit breaker ( In device rating and type) for a food holding equipment unit that requires a 16A 400V three phase and neutral supply that is supplied by 5 core SWA. I think I should pick a 16A 3P+N RCBO but wasn't completely...
  18. M

    24V dc lighting circuit

    I am having a flat roof constructed with solar panels over. As it is a cold, vented flat roof I will be having 175mm of Cellotex insulation immediately above the ceilings which I am reluctant to dig into to fit downlights (which I have never been the world's biggest fan of anyway). My thoughts...
  19. H

    Dimmer switch with discrete circuit

    Is it possible for a single dimmer switch to control two circuits, one which dims and the other which is a discrete on/off? I would like to be able to dim downlights while also switching a non-dimmable bathroom mirror on/off from one switch. Many thanks
  20. newfutile

    Mixing of circuit breakers

    It's all coming out anyway so it's an acedemic question. Would a Bill consumer unit be comparable with Eaton breakers? An Eaton main switch and mcbs are installed so height differences won't be a problem. I'm changing it for full rcbo with spd board anyway.
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