rcd main switch

rcd main switch

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  1. H

    What type RCD when PV on system?

    Hi all. Try to keep this nice and short. Had an EICR fail on a health centre due to corrosion on main supply which was causing high Ze values (DNO not interested in changing the supply). Option is to install earth rods and change main switch to a time delayed 300ma 4 pole RCD main switch...
  2. A

    T T consumer unit upgrade

    Hi I am installing my first tt system consumer unit I understand that I need a 100 amp time delayed rcd main switch but can I use rcbos in line next to them or Mcbs and does any one know of a lockable board as I need to install it vertically thx
  3. M

    Rcd Main switch blown by Ze test

    Hi all just wondering if I could pick you brains, I was doing a ze today on a consumer unit, 80amp rcd main switch, (the test button wasnt functioning so I was already thinking as to what caused this to blow) I disconnected the main earth, turned the main switch into the off position, I then...
  4. The apprentice

    300 mA RCD main switch agricultural (tripping)

    Hi there thank-you for taking the time to read this! I have a 300mA Rcd in a grain shed on a farm now every time I try reset it won’t stay on there are 3 phases that go into the main switch And it isolates all 3 bar the neutral so when wen everything is turned off mcb rcbo in the board it...
  5. Gavin John Hyde

    Old install 100mA RCD main switch but no 30mA

    Have to replace this old board for a elderly relative of my soon to be wife, British Gas have been along and used soem of the special triangle stickers to say it is unsafe - but still fitted the new boielr anyway with a FCU from the socket circuit in kitchen, as always money is the priority for...
  6. C

    RCD Main switch on TT system

    Hello everyone, Does an RCD as main switch in a TT system a must or not? My question is can you use an isolator and then RCDs for the rest of the distribution board? Thank you
  7. S

    CHINT RCD MAIN SWITCH MALFUNCTION AFTER TEST

    Installed a new radial circuit in a garage from an existing CHINT garage unit. All functioning well (tests fine) until after the RCD test. Then everything, lights etc stops working. On investigation, while I've got 244V at the incoming side of the main switch I'm getting a reading of...
  8. C

    Electrician Jobs 3 phase RCD main switch on Dis board

    Hi guys My friends are selling a house in France and they had an electrical survey which said they need to fit a RCD main switch on the dis board, the supplier has fitted an RCD at the main in coming cables but it’s about 20 yards away from the house and the survey said the dis board must be...
  9. 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...
  10. 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.
  11. C

    Loft conversion - RCD main switch query

    Hi all Unsure where to post this so if this is in wrong section I apologise! I have been asked to wire a family members loft conversion (one bedroom and en-suite) and I am planning to run a 16mm t&e to a new 5 way DB (lights, ring main and electric 10KW shower) in the loft and needed to know if...
  12. Simon-0116

    s type rcd main switch

    How do you verify its an s type, owner says previouse electrican fitted time delay 100ma rcd main switch,. All I can see is it says 0.1, which id 100ma, 125a rating. Do some have adjustable time, or what is the time delay range of s s type thanks
  13. D

    RCD Main switch, electrical installation certificate

    Im still in learning stages guys to I'm no expert lol few questions if any1 can help me out electrical installation form i am filling out is protected by a RCD as a main switch and says describe main switch in certificate. I understand i need to complete the bottom (protected by a 30ma RCD...
  14. 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...
  15. 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...
  16. 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...
  17. 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???
  18. C

    RCD as main switch to self contained flat supply CU

    Hi all just a quick one, what's are view on using 63a, 30 ma RCD as the supply to a self contained flat CU within a house? Basically im doing CU change & remedial's after EICR, many circuits so gona need large CU or 2 * 10 way split load, 1 for the household standard circuits & separate for...
  19. E

    RCD main switch tripping

    had a call out today where the RCD would not hold, at first i hadall the MCB's off and ramp tested the RCD and it was tripping at 12-13 mA consecutively. i've briefly tested all the circuits and theres no earth fault, i've had a clamp meter on the earth and switched on all MCB's individually...
  20. S

    For Sale : 5 x Crabtree StarBreaker 9 way 17th EDITION Dual RCD with Main Switch.

    As tittle says new in the box . £35 each + £10 Postage .No breakers inc. Just 2 x rcd and 1 x mainswitch.

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