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circuit

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  1. 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...
  2. 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.
  3. 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...
  4. 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...
  5. W

    If you have 3 single core cables in conduit for a singular circuit would this be classed as bunched?

    Hi there, I'm Currently doing my design calcs for my college project and doing the actual Zs calculation. Formula is Zs= Ze (or Zdb) + (R1+R2) Then for (R1+R2) you find the (R1 +R2) per metre value in the On site guide appendix i - i1 , which for me line and cpc are both 1mm so its 36.20 . I...
  6. 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...
  7. 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
  8. 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...
  9. 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...
  10. MaintenanceSpark

    Separate bathroom circuit

    Hi guys. I'm a Trainee Maintenance Electrician so please excuse my ignorance on bathroom wiring etc. After reading this forum and watching youtube (Artisan, Bundy, CRJ Electrical) I've learnt that my bathroom should be RCD protected but the problem I have is that none of my lights in my house...
  11. _KaCe_

    Trouble shoot why a ground fault circuit breaker keeps tripping.

    I installed outdoor lighting and outlets. I finished this past year. I passed my inspection on April 2022. I was so pleased, BUT now the circuit the outlets are on has a problem... the circuit keeps tripping. Question 1: I was wondering if there's a way to test the circuit breaker itself? Then...
  12. L

    Replace old fuse wires with circuit breaker?

    This appears in our Building & Pest report: "Safety switch installed, old fuse wire fuses still in use, recommend replace with circuit breakers." The home was built in the 1980s. Are old fuse wires dangerous? How dangerous are they? What are the risks of replacing with circuit breakers? Are...
  13. P

    Which is Better: 15 Amp Split Circuit or 20 Amp Circuit in Kitchen?

    Hi there. I am a doing some DIY kitchen work. In Ontario Canada, code allows either a split 15 amp multi-wire circuit or a 20 amp circuit (each with two receptacles allowed on the circuit). We only need GFCI if 1.5 m from a sink, so the outlets I am installing do not need GFCI protection. Is...
  14. T

    Capacitor in AC circuit

    I have a question about a school circuit called a capacitor in an AC circuit. The capacitor is connected directly to the AC source and the phase shift is measured, which should be 90° voltage to current. My question is whether this phase shift will be 90° in every case or this also depends on...
  15. joshimoto

    UK Wiring new Hob / Cooker into circuit

    Hi folks, DIYer here, hoping for some advice before most likely calling in a spark. I'm looking to wire in new cooker and hob (separate units). Max draw 3.5kW and 7kW respectively. I believe the circuit is radial from consumer unit (32A RCD) to 45A DP switch plus socket. Have done diversity...
  16. Q

    Switching and isolation for cooker and hob on same circuit

    Evening all, I'm upgrading my kitchen electrics replacing the current gas hob for an induction hob. The oven was previously plugged into the kitchen ring. My thoughts are that with diversity and the fact both the oven and hob are on 13amp plugs or rated at less than that, then they could go on...
  17. Moley

    Anyone got a circuit diagram for a Megger OTS 60PB oil dielectric breakdown tester?

    Bit of a long shot but has anyone got a circuit diagram for a Megger Foster OTS 60PB oil breakdown tester. Ours has gone 'breasts skyward' and I'm trying to fault find. It'll go through its self test but as soon as it tries a HV test it resets. Even at just 1kV it resets as if you've turned it...
  18. SEGOVIA123

    Garage and House Circuits—problems with circuit breaker tripping in Garage

    Hi My main feed comes into the garage, feeds into the meter and then out to another box with a 60AMP fuse then into the house consumer unit. There are tails feeding the consumer unit in the garage, which up until recently didn't have any RCD protection. As part of a recent...
  19. N

    Circuit numbering confusion?

    Just watched this and can't argue with his logic, but I'm yet to see a board numbered in this way... Anyone do this?
  20. C

    How can i have power flowing in a circuit where 1 item works but rest of chain does not?

    There is power flowing. I have checked with multimeter. One light on the line works..even replaced the switch it is connected to. Rest of line still down. Been down for months since a large storm although no indications of lightening strike. Replaced breaker on Sunday...no dice. On Tuesday power...

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