circuits

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  1. W

    Two ovens - how many circuits?

    I'm planning to get two single ovens and have been trying to find the best way to do the circuits. People seem to do it every way possible but I have doubts about some of the ways that they are done. The ovens I'm looking at are 16A appliances (max power is approx 14A), so I won't be plugging...
  2. J

    Timers on LED Lighting Circuits

    Given the demand for low energy lighting in new build/major extensions it seems that the LED technology leads the supporting equipment such as dimmers and timers. The problem I have is that a client wants to put all the lights on each of four circuits on a 24/7 timer for security purposes (each...
  3. Marti

    Random RCD trip & interconnected circuits. Suggestions appreciated.

    Hi There, I was called out to a house RCD trip which would not reset. An old style 10 way split board with a single 30 ma RCD (half without RCD protection). RCD checks out fine but I found a faulty chandelier & replaced it with a single bulb for now. Also a faulty 12v transformer flickering; now...
  4. Andy5678

    Adding RCD protection to existing circuits

    Here’s a commercial scenario for you to comment on over you nightly dram. So there is an existing consumer unit with older style MCBs or bs88 fuses. RCBOs cannot be added to existing and customer wont pay for a new consumer unit. My soloution is to add a garage unit onto the side. Remove...
  5. J

    Best way to add Garage circuits

    Hi, I am a keen DIYer (dangerous phrase - I know) but will NOT be doing this work myself and will be getting a local sparky (Part P etc) in. However I'd like some advice as I want to check its the best way of doing things. I have a Tenby split load Consumer Unit (circa 2005) in the Garage with...
  6. Paul Langham

    Wiring 2 lighting circuits using one 6 terminal junction box

    Hi there, my name is Paul and I'm currently studying towards a city and guilds level 2 electrical installation, we are currently on lighting circuits for our practical, we have been given a task to wire up 2 lighting circuits using a 6 terminal hager junction box, I'm ok with wiring one circuit...
  7. 7

    Cooker circuit options

    Just finishing a rewire, customer not sure on hob and cooker at design stage so I went for 2 circuits with 6mm withe 2 32amp rcbo's. Hob and cooker 5 meters apart. Now induction hob and oven have arrived onsite and both suggest a 13amp supply is suffice. Should I downgrade the rcbo's to...
  8. S

    Two 'Circuits' in one MCB

    Can't find the recent thread about this, but I've been looking at smoke detectors and got this from AICO under System Installation: "• The supply for the mains powered alarms shall be taken from an electrically protected, regularly used local lighting circuit at the nearest source except for...
  9. cprfenom

    2 external lighting circuits fed through 1 SWA cable

    Evening, Although I cannot see a specific regulation can anyone come up with a reason why someone could not run 2 line and 2 neutrals with both circuits fed from the steel wire? To verify this would feed 2 number lighting circuits down one path, but I.e 1No 5 core swa. From a cost point of...
  10. A

    Rewire and circuits advice

    hi guys I’m a qualified industrial electrician so I am competent working domestically however don’t have the official quals etc. I’ve Recently bought my first house and if there was ever a time to do a rewire now is the time as the whole house requires decoration etc and I’m thinking of...
  11. Dengar

    Contactor issues on ceiling heater circuits

    Hi I looked at a contactor schneider ict 4 pole 400v 25a. The fault was a loud knocking noise coming from the electricial riser cupboard. I suspected one of the contactors was pulling in and out rapidly (this known as chattering?) I am hoping you can point me in a direction as I'm not...
  12. 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...
  13. 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...
  14. 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...
  15. 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...
  16. 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
  17. 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...
  18. 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...
  19. 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
  20. 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 .

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