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main switch

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  1. J

    Wylex main switch

    Hi , could someone help me please , I did an eicr yesterday. Few questions now the ccu is the old Wylex board with push in type mcb's 3871 type , what is the main switch bs en number ? Can I say its a limitation as it's not evident ? the Ze I recorded is 0.63 ohms it's a tncs , is this a c2 or...
  2. F

    nominal current rating of main switch

    hi guys if installing a shower consumer unit with a 63amp rcd main switch and a 100 amp OPD PRIMARY SUPPLY then main switch is of a lesser value than the main over current protective device how do we get around this.
  3. J

    old mem board with rcd as main switch

    I'm looking at an old mem board for a periodic that has an 80A rcd as its main switch, unfortunately has no other markings on it for bs/en numbers. does anyone out there know what its likely to be? i very much doubt its 61009 the rest of the MCB's look like bs 3871's, the house was built early...
  4. D

    Replacing main switch with RCD...

    Just wondered how acceptable this would be... Need a couple of extra ways on a consumer unit. Seeing as it's fitted with 2 RCDs (DP and rated the same as the main switch) is it acceptable to simply remove the switch and feed the first RCD from the tails?
  5. P

    big old brown BILL fused main switch

    Anyone know the bs number, it's a 60A fuse. Cheers in advance
  6. W

    Changing main switch on CU

    Hi all Just looking for some advice pls. I've been told that I need a new CU as the existing main switch has the wrong rating. Isn't possible to just change the main switch. Existing CU is Marbo. Many thanks
  7. S

    3 phase 125amp or 250amp main switch

    Why on a 3 phase supply do you only get a choice of 100amp/125amp or 250amp main switches? The basic domestic main switches are normally 100amp. I would have thought that with the added voltage, that there is a greater potential amperage? Granted resistance will be reduced with the 3 phases but...
  8. E

    Anyone heard about recall on mk 100 amp main switch?

    Evening all, has anyone recieved email from Screwfix?
  9. jaydee81

    mk 100 amp main switch product recall

    just found this thought i would spread the word SwitchExchange
  10. T

    Rcd main switch

    Hi guys, I admit this is just me being to lazy to go to the van and get my regs book. The reg about not using an rcd as a main switch, does it specify a ma rating or anything about time delayed or TT system exemptions? I ask as i was planning to replace a main switch with a 100ma type s rcd...
  11. D

    main switch

    is it ok to use a rcd as a main switch
  12. F

    main switch versus OPD

    HI ALL whilst completing certificate on pirform having installed a shower consumer unit with a 40A 30ma rcd and mcb nominal current rating of main switch in relation to overcurrent protective device (ie) main switch is rated aty a lesser value than main over current protective device, supply...
  13. M

    main switch

    Is there a regulation in the bgb that states you cannot come off the main switch to feed another db, not that I want to do this I've just come across it being done today
  14. M

    main switch

    Hi all Is there a regulation in the bgb that states you cannot come off the main switch to feed another db, not that I want to do this I've just come across it being done today
  15. S

    Rcd main switch BS EN

    Hi just a quick question, I messed up one of my test sheets for my log book which has been thrown back to me because of an incorrect BS EN number for the rcd main switch which was an honest mistake. I am now Re-doing the sheet and I have spoke to a spark on site and I said that it should be...
  16. D

    main switch size?

    Can anyone let me know what sizes of 3 phase main switches there are?
  17. P

    Shock with main switch off

    Mate of mine rang me and said he changed a light fitting in one if his bedrooms. He turned the main switch off so not just the breaker for the upstairs lights,And he said he got a shock when touching the earth and neutral!! I said are you sure it was a neutral he said definately and he's fit the...
  18. B

    CU with no main switch - is it acceptable?

    Hi My sisters cu appears to have had the main switch removed to make room for more mcbs. Whoever did this just took it out and placed it on top of the casing. The cu has 2 rcds to the 17th. But is this acceptable to remove main switch?? Thanks in advance!
  19. i=p/u

    Causes of knackering a rcd main switch

    Just pushed test button on rcd and didnt trip , and ramp tested it and >50..... Im nearly certain i pushed this before and it worked, would a recent powercut of caused this???
  20. W

    Rcd as main main switch?

    Just a quick one. Is it acceptable to have a 63a 30ma Rcd as a main switch? Can't see why not but just thought I would see what others say?

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