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main switch

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  1. grumpyjohn01

    (Another!) Main switch tripping...

    Called out to elderly couple's house today - no power. All 3 lighting circuit breakers are tripped and mainswitch is off. Quick check reveals PIR lightswitch faulty and 1 lamp failed. Replaced the PIR switch for standard 1G2W switch and reset everything, seems fine now. Question is, how did...
  2. M

    CU Main Switch fault

    Hello all, I've got an unusual fault on a cu main switch in a Wylex split load board. I was called to a property with no power. The main switch was in the off position and both rcds and all breakers were in the on position. There was a leak on the toilet but no water through the electrics...
  3. Golden Graeme

    Earth requirements for TN-S with RCD 30ma main switch

    Hi, I am newly qualified and didn't really cover this scenario. I am a little unsure, so some advice would be great. I have an old installation that has a 6mm earth cable from the DNO TN-S to the consumer unit earth bar. The consumer unit main switch is a combined 100A and 30mA switch. This...
  4. hasel5

    100Ma Rcd main switch On TPN board

    Got a quick question for you Been to a dilapidation job today and have the following TNS-C 100A supply in a Build from 2008 with a 12 way TPN board Main switch is A 100A 100 MA 4 pole RCD No 30 MA RCD protection to any outgoing circuits. So if any circuit has a earth fault whole board...
  5. E

    Why is there 8 volts across the main switch when the mech n/storage timer is off?

    I have a mechanical timer switch controlling the night storage radiators. My multimeter can read AC volts but not amps. The mechanical timer switch is showing off at the moment, however:- When I put the multimeter across the supply with the consumer unit main switch on it registers about 8...
  6. the pict

    Main switch fuse

    Where can I get a 1361 40 A that is the same physical size as the 100 A. Pict
  7. i=p/u

    Main switch

    Anyone point me to the reg which states all line conductors should be broken on a main switch?
  8. i=p/u

    Rcds as main switch

    Fuse board with say 80A rcd main switch on a tt system . I seen guy at work at wrote on sheet as non compliant as rcd main switch should be before fuse board to protect tails. Is is he correct , i would say say no as there's still going to be gap if even if he put in rcd before board
  9. D

    NICEIC Certification Scheme BS EN 60439-3 main switch not listed on NICEIC certificate form

    As per title. I'm new to online certification and having trouble detailing the main switch of a CU. Its a BS EN 60439-3 but the option for this in the appropriate drop-down menu on NICEIC's website is not there.. Any ideas? Have i got the wrong BS number somehow? After a quick look around it...
  10. HappyHippyDad

    Any good ideas for holding the tails (clips etc) as they enter the main switch in CU?

    I shall be changing a CU soon (same thread as just started!) and it is a TT. I'll be using a wiska sprint gland to hold the tails (25mm) and main earth in place as they enter the CU (from the bottom) but I dont really see how this is going to help with respect to the possibility (however...
  11. P

    CU with a Left Hand Main Switch

    Hi Guys I'm wanting to replace an old 8 way consumer unit which is above the kitchen cupboards. I've limited height of 233mm. All cables are top entry but the tails are to the left of the rest and no doubt won't move. Anyone know of a Amd3, dual RCD unit , min 8 ways, max 230 mm height, left...
  12. P

    Markings on a CU Main Switch?

    Hi Guys Just purchased a CU containing a Main Switch from a reputable company, but having an issue with the Main Switch. Am in discussions with the supplier but would like to be a bit surer of my facts. The switch is stamped BSEN60947-3 125A 240V. Terminals are well marked. But no CE mark, no...
  13. M

    Main switch burnt out beyond repair

    Morning all, been asked to to look at an old fusebox (Wylex) where the main switch has been burnt away due to a loose incoming live tail connection. obviously no spares are available, so it's deffo gonna be a new unit. Ordinarily I know this would mean a full eicr before changing the unit, but...
  14. polo1

    100mA rcd main switch

    Folks, I've just been at a job with a MEM split board with the sockets coveted by a 100mA, 100A main switch. The installation is 15 years old. Was 100mA ever acceptable in a domestic installation of this age? I'm beginning to doubt myself! Cheers.
  15. leep82

    no main switch in DB

    Came across a scenario today where the consumer unit had no main switch. It was a split load dual rcd board on tt installation. The incoming tails had been taken into one rcd, and connected in parrellel over to the other. There is a double pole isolator right next to the board, but nothing...
  16. Gazthesparky

    Main switch bs numbers

    Having a brain fart at the moment could some one put me strait and help me out. I'm filling in an EIC and in the part it says main switch/ switch fuse part i'm stuck on which BS number to it put. i have a metal switch fuse so its that BS number i'm putting in. I don't know what to list as a BS...
  17. M

    Would you code a 60 amp main switch been fed from a 100 amp BS1361

    I carried out a EICR and the main switch for the consumer unit is only rated at 60 amps and the main supply fuse is a BS1361 rated at 100 amps. Im thinking this should be a C2, what are your thoughts please. Many thanks Martin
  18. L

    Dual RCD Split board with unprotected circuit with N wired into Main Switch

    Hello all. A friend of mine is looking to buy a house and got me to have a cursory look at the electrics for him. One thing seemed a little peculiar but i'm not sure whether or not it'd be deemed unsafe when he gets the EICR certificate done. The Consumer Unit is a fairly recent looking BG Dual...
  19. Simon-0116

    mem glasgow main switch switched fuse

    Mem 800 amp switched fuse.main switch.Parraell out outs. All complete and working. Quality item. Also variouse mem glasgow 160a 200a. Located near sheffield.
  20. P

    main switch question

    Hi guys, Im installing some main switches in an installation to cover 3 boards. A question i have is, they anything against the regulations or indeed bad practice to fit a single main isolator switch to cover the 3 boards or should they have 3 individual ones. What i got is a single phase...

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