circuits

  1. M

    Similar places in two circuits causing trip

    I have two line wires coming out of the top of the 'Sockets' B32 MCB. One of those line wires connects to 3 sockets in the bedroom and the other wire connects to 5 sockets in the living room. Each socket takes two line wires, one to power the socket and the other to pass the current onto the...
  2. HappyHippyDad

    Outside light fed from 2 circuits

    I went to a small job today to change a sensor for an outside light. I expected it to be straight forward. I started by isolating the supply, which ended up taking longer than expected as it needed 2 circuit breakers to be off in order to isolate it. I explained that i would need to remedy...
  3. G

    Outdoor Heating, Blind Motors, New Circuits - Brain hurts!

    So, with the house job nearly completed, the wife wants some outside heating and the blind man needs to connect his motors for the new outside blinds coming... HEATER She’s found a 2kw infra red heater that, while I’m not keen on trailing cables on the deck will probably do the job if it’s...
  4. FatAlan

    Dimmers on two way switched lighting circuits?

    I've installed a number of dimmable LED downlights switched two ways. They're switched by one dimmer and a standard rocker. When they are switched on with the dimmer the lights operate normally and can be dimmed however they seem to override the other switch which will not switch the lights off...
  5. M

    Swa 4core cable used as two 2core circuits

    Working on a job have found a 4core cable going into a weather proof box and splitting up into 2 circuits again at the board it split in two single phase MCB s . My question is would you judge the current carring capacity of the cable as a two wire or four wire
  6. Baddegg

    No pics sorry............

    Went to view a kitchen refit this week, new kitchen and new rfc circuit dedicated to the kitchen, have a look at the CU and whilst inspecting I see that the 2 lighting circuits, up & down, are both wired with the same 1mm 3&E cable (pre 2005 cable) Red as line to down mcb, yellow to up mcb...
  7. Marcus Vaughan

    Calculating Voltage Drop On Lighting Circuits

    Hello All, I should know this and have been avoiding asking but just want to be sure. So I am designing a downstairs lighting circuit for a domestic refurb/rewire. I reckon max demand will never hit 3 amps. So using the basic formula for voltage drop - (tabulated value x design current x...
  8. S

    Adding new circuits to all insulated consumer units

    hi guys, Is it still ok to add a new circuit to an all insulated consumer unit in a domestic dwelling. I only ask as my previous employer always changed consumer units for metal when adding a circuit. I know this is probably a stupid question. Thanks for replies
  9. J

    Oven and cooker circuits

    Hi i have a double oven which is 5.8kw and induction hob which is 7.4kw there currently isnt a cooker circuit in the house but there is 2 spaces in the CU so am I correct in thinking I can put 2x32A breakers in and run 6mm cable to both .
  10. Marshall Kidd

    Splitting 3-phase circuits for 3 high draw theater fixtures.

    Hello. I'm new here so my apologies if this post ended up in the wrong forum. I have a basic understanding of phases and voltage and the lot. Today I'm trying to wrap my head around how I might be able to split one 3-phase 240v 50a source to accommodate 3 high draw theater fixtures. Here's...
  11. Gary Tollison

    Lighting circuits and possible cross-over

    Hello. I have a possible issue with the lighting circuits in my house. There are two lighting CCTs: Dropbox - 01.JPG - https://www.dropbox.com/s/ike2aygjja64pfm/01.JPG?dl=0 1 LIGHTS supplies: Lounge Kitchen Downstairs toilet 2 LIGHTS spplies: Hall Upstairs landing Upstairs bedroom Upstairs...
  12. T

    When old phase colours are used in socket circuits...

    Just finished work (10 pm) was wiring in a socket or two. As it was late had to keep me marbles about me! Strange feeling connecting blue into live.
    • The Ghost
    • Thread
    • circuits colours old phase socket
    • Replies: 38
    • Forum: UK Electrical Forum
  13. D

    Two socket circuits not allowing RCD reset

    hi folks, Been asked to go look at a job tomorrow as his RCD is not resetting - customer sent me some details and from what I can determine is this.... It’s only socket circuits that are on the RCD side of the board. The downstairs socket circuit and the kitchen socket circuit are both off -...
  14. soms

    Maximum permitted Zs values for circuits with TT earthing system

    Hello, I am assisting my supervisor and getting some first hand experience of completing certification by filling in an electronic copy of an EIC, working from a handwritten circuit schedule with test results and my memories of the installation work. I am at home so cannot ask him for advice...
  15. D

    Distribution circuits

    Good Morning I have a series of Henley blocks suppling db’s. Henly block are protected by an bs88 63amp fuse. We have a 2.5mm 6181y cable feeding a isolator which in turns feeds a fire alarm panel, this 2.5mm cable is around 0.5 metre long and within the fire alarm isolator, there is a 20amp...
  16. L

    Advice ref blinking lights all circuits

    Hi there, I should start by saying I am not an electrician, but am after some advice as we have a problem that we aren’t getting any answers on. In January, we had a new fuse board installed to replace an old edition one. This is a recent Wylex model with circuit breakers. The electricians...
  17. andysparkfree

    100ma 100amp 3phase main switch on TT system and rcd protection on the rest of the circuits question

    Hi all , my question for your brilliant minds is (ill first set the scene) 35mm 4 core swa coming from an external supply, 16mm earth ran out to an earth rod(ze at the distribution board main switch 0.35ohms) now this is quite a large installation with a 3phase distribution board in the...
    • andysparkfree
    • Thread
    • 100amp 100ma circuits main main switch protection question rcd switch system tt system
    • Replies: 3
    • Forum: UK Electrical Forum
  18. G

    Domestic favour, tripping RCD and redundant circuits

    I have been asked to look into a random tripping RCD. The installation is quite simple, now only only four circuits, None RCD protected side has only the lights and a redundant 16A MCB 2.5mm radial for which no accessory could be found, possibly disconnected outside lights but the circuit was...
  19. W

    IR test on lighting circuits

    whilst carrying out EICR I usually find it near impossible to disconnect all loads ( on lighting especially) I there fore only carry out IR on Line and neutral to Earth. However, when I see most other certs, they claim to have recieved 299 ohms on live to neutral? Am I missing a trick, or am I...
  20. P

    2 gang light switch on seperate circuits?

    As per the title is there technically an issue with having a 2 gang light switch with one switch on the lighting circuit and the other on a ring circuit (via an FCU). The ceiling light is on the light circuit and the wall lights are on the ring circuit. This isn't something I would personally...
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