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30ma

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  1. K

    main RCD trips before RCD 30ma spur

    just moved in to a new house fed from 20 amp, Got a 2.5 going to a RCD spur then a 1.5 out of that to a pull cord, then another 1.5 out of that to the shower. pull cord could be on its way out, does seem to trip when switching, not when in use. doesn't trip all the time its nuisance tripping...
  2. A

    Merlin Gerin 30ma 2 pole RCD MULTI 9 Range, TRIPS (oversensitive?)

    :cool:Hello People, Im completing a "SMALL" Commercial Job, and The SUB main is Controlled by a Merlin Gerin 100amp/30ma RCCB, Single phase,2 pole ( DB is 6 WAY) The New Install is on a TT, as it's out of the Equalpotential Zone, When performing tests, the 30ma RCD(main switch) at the sub main...
  3. I

    Re 30ma rcd main switch

    hi guys first post here just wondered if any advice was available. my consumer unit has a 63 amp 30ma RCD mainswitch fed from a 60amp TNCS supply.i intend to run a supply from one of the spare ways in the consumer unit via 20a mcb to the garage which will supply 2 lights ,one outside socket...
  4. L

    30ma RCD test times pass

    Hi there can anyone tell me what are the pass results for a 30ma rcd ? x1/2 x1 x5 thanks alot luke
  5. M

    100ma or 30ma??????????

    Hi Everyone, a quick question for you all, if on discovering a property had no main incoming earth, there were no earth block (tnc-s) to connect off either, you installed an earth rod and the reading was acceptable below 200 ohms, i think, what would you use on your fuseboard for your main...
  6. W

    TT System and 30mA RCD tripping times

    Help! Sorry having a bad day. I understand the concept behind touch contact of 50v and the above 1666 ohms. But when physically testing with 17th ed dilog and testing a TT system 30mA RCD. At 1x and 5X what reading would you see on your meter? or would you just test the mechanical aspect...
  7. C

    40A 30mA 4pole 5pin switched socket

    im selling it and it not as stated its actually a socket, but dont know how to change the title this is a 5 pin 400V 32A socket outlet with 40A 30mA 10kA RCCB built in protection, IP66 rated, earth din rail connector an extra din rail connector. dimensions of the fixable enclosure: 118mm x...
  8. E

    Is 0ne 30mA RCD acceptable to cover all circuits in 3 bed semi - any reccomendations

    Hi , Im looking at doing a rewire on a small 3-bed semi. Im pretty much upon the current regs e.t.c. and am aware of the need to prevent complete loss of lighting (i.e upstairs and downstairs) in the event of an RCD tripping e.t.c However as apparantly there is a need to protect all cabling...
  9. T

    Old Hager 63A 30Ma RCD Main Switch

    I know they are a little old now but would the old hager 63A 30Ma RCD main switch comply as the unit is 30Ma and trips well within .4 seconds at x5.
  10. zone77

    30mA rcd protesction?

    I am installing a 6mm armoured cable to supply a detached garage with a 2-way DB with 30mA protection. the supply cable is NOT buried but goes overhead on a suspended wire. my? is does the supply cable need rcd protecting? if so do i need to discriminate some how or will it be100mA?:confused...
  11. C

    Max Zs on a 30ma RCD

    Hey all, I seem to have it in my head that the max zs, regardless of what breaker you do the test from, on a 30ma rcd is 1667 ohms. But I can only find a reference to this when it comes to tt systems. Does this still apply on tns, tncs systems and if so where is it in the regs? Thanks all in...
  12. L

    CU split board - 30ma / 100ma , problem or not a problem?

    been looking at a cu today, sum of us had a discussion about rcbo's n rcd's. Righty, what we have is a split board, 30ma rcd on one side, and 100ma s type main switch on the other. Got Cb's on the 30ma side which is fine, but on the 100ma side theres 2 x 30ma rcbo's. Now does this contravy...

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