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30ma

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  1. B

    RCD 30ma and 100ma

    found what i was looking for !!!
  2. H

    Adding fused spurs for appliances to existing ring no 30ma RCD old fuse box ?

    I have been asked to add 2 fused spurs supplying under unit dishwaher and washing machine to an existing kitchen ring. The fuse board has 3036 wire fuses and has a large 100ma RCD protecting it. TN-c-s system, earthing and bonding are fine. Is it okay to add these spurs or do I somehow have to...
  3. P

    30ma protection?

    Just need clarification running 2 new supply's to a boiler and immersion heater from new 2way unit in a garage the 2 supplies are trunked in their entirety to fused spur and 20amp do switch Di these supplies need to be 30 ma protected?i have them on a 100ma and been told its incorrect any help...
  4. R

    Crabtree RCCB 80A 30mA

    Hi, I've just been to a job where the main switch rccb keeps tripping during the night. Haven't had chance to do continuity / IR tests yet as the consumer unit was in a corner cupboard with a revolving rack. So I just did an rcd test which tripped on x1/2 so I started switching the mcbs off one...
  5. N

    Induction hob tripping 30mA rcd

    Morning all. I'm in search of ideas. Been installing an induction hob on a 6mm radial backed up by a 32a mcb. Came to power up yesterday and with all hobs on its throwing out the 30mA main switch rcd. (It's a TT system). Iv tested all my cables and there all clear so it's taking it out on...
  6. DaveyD

    100mA delayed RCD tripping before the 30mA at DB. TT System

    Hello Just not on the job at the moment but the builder called. He plugged his small angle grinder in to a new circuit and it took out the RCD at the supplying DB not the 30mA at local CU. Here's the set up: TT . 100A DNO fuse House CU old and full so split tails into small CU with...
  7. Richard Burns

    4 30mA RCDs in series!

    I have just fixed a fault today on a 2 year old install where there was a 30mA RCD from the tails feeding to a remote twin 30mA RCD board feeding a 30mA RCD garage board in an outside office feeding another 30mA RCD garage board in another shed! Discrimination whats that? I did not test the...
  8. R

    CPN 63A 30mA RCD

    Evening guysAs title says, Where can I get one from?What wholesalers sell them or what is compatible with them?Cheers
  9. D

    mem 2000 ad 30ma rcd

    I am looking for a 80A 30ma rcd (AD80HE)for a memera 2000 AD board. Any one got one knocking around that they can sell me?
  10. G

    Can a 30mA RCD be used as the sole means of fault protection for a TT System?

    Hi all, went to a job today to price up an shower install, it was a TT so as i was leaving i decided to do a quick check on the main earthing conductor as i could not see earth rod pit outside house, i had a look inside db and could only see 2 x 10mm earths which i assumed are gas/water...
  11. S

    9.6 kW Shower connected to an MEM Fusebox via 63A 30mA Wylex RCD

    Hi all. I'm a Scotland-based qualified spark. I was thinking earlier and thought i'd ask some older and wiser sparks this one. I've been asked to change over a shower for my aunt, she had it installed a few years back. There was something wrong with the plumbing side of things, ain't entirely...
  12. G

    32A mcb supplying 32A 30ma rcd unit next to db

    Hi as title says my engineer wants me to fit the above to protect ring circuits supplied from a crabtree c50 board, wants me to supply a rcd unit from a 32A mcb with 4mm singles and then supply the ring from the 32A 30ma rcd, I think the reason for doing this is either you cant get crabtree c50...
  13. T

    Nuissance tripping on a 30mA Main RCD on a TT system

    Hi all, hoping some 1 out there can help me on the following problem. just recently qualified and have this nightmare situation with no experience on the following problem. I have nuissance tripping on a 30mA RCD. it trips at random times and can go as long as 5 days before it goes again. the...
  14. R

    Help with RCD - 100mA to 30mA

    Visited a job yesterday in an office to look at extending a ring to add some additional socket points - the existing RCD / isolator which covers the whole installation, is a Wylex 100mA 63A (fitted in the consumer unit). The installation has no 30mA RCD cover on the sockets. There is a second...
  15. L

    RCBO True operating current 30mA????

    Called to investigate a fault in a building which has lighting on TYPE B RCBO's, ive stripped everything and all the wiring is good >800Meg everywhere as its less than a year old, the switchgear is Eaton Mem and the accessories are the cheapest nastiest youve seen, the main lights are twin 9w...
  16. DaveyD

    Wanted :: HAGER RCBO B 6 AMP 30ma RCD MCB

    Hi I'm looking for a 6a version of this http://www.mail2web.com/cgi-bin/redir.asp?lid=0&newsite=http://cgi.ebay.co.uk/HAGER-RCBO-B-32-AMP-30ma-RCD-MCB-104205-4500-AD010B-/280667355848 Its for an old Hagar board and I need to replace the 6A CB with an RCBO. Any one have one? If not any...
  17. V

    Reading on 30ma trip too high

    Hello, I have completed a test on a flat ,everything was fine until I got to the RCD test. The set up is T-N-CS ,6 circuits on the main switch side of the board and four on the trip side .I,m using a Fluke tester and have recently got it calibrated ,when I do x1/2 it,s ok ,when I do x1 it reads...
  18. T

    Power washer setting off 30ma rcd

    While testing an installation the client asked me to remove a 30ma rcd which protects a power washer as it trips quite often. The powerwasher has a 13amp plug fitted which I'am about to fail,(portable applaince test) as the the maximum load is 17amps.How The fuse fails to blow I don't know.I...
  19. V

    Disconnection times for 30mA RCD at 5 times current.

    Hi guys ths is my first time on here and relatively new to electrics. I was asked to find the times of disconnection needed for 5x and 1x. I was wondeering if anyone could give me a push in the right direction by pointing out where i could find such useful info inthe BS 7671 or onsite guide...
  20. B

    Max Zs readings where circuits are protected by 30ma RCD's

    I have noticed, a lot of max Zs readings on test certs (Where RCD's are applicable) are being blanket recorded at 1667 ohms. On a personnel note I consider this to be poor practice, and prefer to see max Z's taken from tables 41.2 41.3 and 41.4 of chapter 41 of the good old guide. My reasons are...

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