circuit

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  1. 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?
  2. 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 overload short short circuit shorts trip
    • Replies: 1
    • Forum: Australia
  3. 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
  4. 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...
  5. 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...
  6. 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...
  7. 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...
  8. 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
  9. 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...
  10. 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
  11. 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
  12. 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...
  13. 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...
  14. 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.
  15. Michaelwgroves

    Boiler circuit 16A MCB

    I'm following a spark who used an existing Panel Heater circuit, for new gas boiler circuit 6 months ago. The panel heaters were removed, so it's now a dedicated boiler circuit. I'm doing an EICR. I've found a number of faults; 1. No grommet in Consumer unit knock out, used for gas bonding (It's...
  16. S

    Add extra 13A sockets to Cooker circuit.

    There is a severe lack of sockets in our kitchen. We have a cooker control switch with a single socket in it, but no cooker connected. Would it be possible to run extra 13A sockets off the cooker control circuit? If so, would this need to be done by an electrician to be complient with regs...
  17. J

    EV wiring for 80Amp circuit

    Hi, I plan on burying 3 AWG in IMC from the house to garage to create an 80Amp circuit for EV charging. What is the product name of the kind of L1, L2, N, and G wiring that I need for this job. Is the correct designation 3-3-3-5? Can I use UF? What is the best wiring to run for this 80Amp line...
  18. Rebwar

    Circuit Summary and load calculations, L3 design project

    Hi Could someone check my answers in the page aploaded please? I'm not sure about my answers according the notes number 1 to 4 and also the stated circuits. Thanks
  19. V

    Adding a socket to a garage circuit.

    Hi everyone, I've got a garage with a circuit that looks like this: I believe it's a radial circuit coming out of the MCB with a current rating of 20A. It goes in to a switch containing a 5A fuse (fused spur?). It then has two wires coming from it: one for a bulb, and the other for a socket...
  20. timhoward

    4mm shower circuit 8.5kw shower

    At a bread and butter job, loose socket, socket not working, change two lights. Sticking out rather like a sore thumb was this (I removed the wire to check size): I finished the other work, then said could I have a look at the shower as I've got a concern. It was 8.5kw shower. 6 sq mm cable at...

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