protection

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  1. A

    Will an RCD offer any protection in a building with NO earth circuit?

    I live in Phnom Penh, Cambodia and people die here regularly by electrocution. There is no earth wiring in the buildings, just live and neutral. I am a member of an expats forum and the question arises: Will using an RCD device offer any protection at all? I understand RCD's will go off with...
    • AmatuerinCambodia
    • Thread
    • building circuit earth no earth offer protection rcd
    • Replies: 64
    • Forum: UK Electrical Forum
  2. R

    Is a 300mA RCD protection against direct contact (Portugal)?

    Hi friendly people, As you may be aware, I'm a plumber, so quite possibly what I am seeing is correct, though it seems a bit odd to my untrained eyes. Hoping someone might be able to explain a few things to me as I need a bit of reassurance regarding RCD ratings. I'm currently at a relative's...
  3. S

    Switch mode power supplies and protection class.

    My understanding is that a SMPS does not separate, like a SELV transformer, the secondary from the primary. Therefore presumably the equipment supplied cannot be IEC protection class III. So what class is the equipment? For example a laptop with an SMPS, metal body and high resistance...
  4. K

    How does Touch voltage work without RCD protection

    Hi everyone I asked my assessor about touch voltage and he was not keen on explaining properly and gave me a rough answer which made me think probably he was not sure himself or was hiding it. basically my understanding is afcourse that how 30mA RCD works to limit touch voltage to 50V is by...
  5. S

    Classification of RCD - for Additional protection only or Fault protection?

    I would appreciate some opinions on the following situation... I have been asked to comment on an EICR for a local community resource (church hall used by various groups of all ages). During an EICR on the TN-C-S installation the testing of a ring final circuit gave R1+R2 and Zs(db) values that...
  6. I

    will SPD protection now have to be added for an addition to an existing circuit

    can any one clarify if a SPD will now need to be installed when making an addition to a existing circuit? many thanks
    • ianphilip007
    • Thread
    • added addition circuit existing protection required spd
    • Replies: 12
    • Forum: UK Electrical Forum
  7. F

    Advice on RCD Protection for commercial office sockets (earth leakage)

    Hi guys, I've got a job where I'm installing dado trunking on the floor of an office for sockets and data. Some info on job - In total I will be installing 36 double sockets to supply 40 workstations. Majority of the workstations will be a laptop with dual monitors and phone setup. Some of the...
    • fordselec
    • Thread
    • advice commercial earth leakage leakage office protection rcd sockets
    • Replies: 18
    • Forum: UK Electrical Forum
  8. N

    Battery solar protection for inverter and battery

    Hie. How can I size my protective devices for my solar installations because most breakers keep burning out. I'm I missing something?
  9. R

    Surge protection devices

    Hi Guys Hoping for a straight forward answer. Please can someone tell me if SPD's are mandatory in domestic dwellings at the moment (Amd1) and are they going to be mandatory with AMD2. Thanks
  10. mlxmilano

    Help to wire washing machine cables into wall motor protection switch

    Hello, I have two electrical switches in my house that should be connected to the washing machine and the dryer machine, respectively. After having opened them I found 5 cables: black, white, red (connected to the central part) and yellow, yellow-green. I am nearly sure the yellow is the...
  11. G

    UK Type B RCDs for fire protection?

    Hi all, not been around in a while but I'm working through a quote at the moment and found this at the end of the equipment (AC kit) suppliers quote. From the icons provided were definately talking B type and not B curve. For the job in question this one paragraph statement could add...
    • GBDamo
    • Thread
    • fire protection rcds type type b
    • Replies: 6
    • Forum: UK Electrical Forum
  12. N

    Rcd protection for caravan hook ups

    I'm sure this will have been covered before but please bear with me. Have been asked to replace a main Distribution board for a fairly small caravan site and add in some new hook ups ( space for 8 x 16A sockets currently but upgrading to 12 x 16A and a 32A). Now this is all fed from one 100A...
  13. S

    Suggestions for frost protection stats

    At our church, one of the things I've done is sort out the heating wiring (as best I can for now). The schematic is as shown below. The theory that had me arrive at this goes : Previously, when the wall stats was satisfied, the pump stopped along with the boiler. As we have a number of...
  14. M

    Using armouring as earth and RCD protection

    Hi, If an SY cable is used to supply a consumer unit, and there isn't a guaranteed depth of 50mm for the wall it is in, would using the braiding as the earth negate the meed for RCD protection of that cable? Thanks
    • Mspark2987
    • Thread
    • earth protection rcd using
    • Replies: 5
    • Forum: UK Electrical Forum
  15. B

    Lightning Protection systems T&I

    Hi All I am seeking a 1 day Lightning protection system inspection and test course in the east Anglia, Suffolk, Cambridgeshire area. A google search gives me few a far between courses and dates. Any help with find training specialists or courses would be a great help. Thank you
  16. A

    Arc Fault Protection

    Hi Everyone, question. Have furnace in basement (nothing else in basement besides electrical panels - not finished basement). Inspector is saying furnace is required to be on arc fault breaker. Per NEC 210.12, I completely disagree. Any input would be most appreciated. Thanks
  17. A

    Can a BS 61008-1 RCCB be used for fault current protection

    I am aware that a BS 61008 can't be used for overload protection but is there a reason that it can't be used for fault current protection.
  18. A

    UK New CU, Arc Fault Protection and future proofing

    My electrician has just finished doing some work and testing for me. Later this year I am going to build a new extension to my house and he suggested fitting a new consumer unit now, with extra populated ways, in anticipation of my future need for additional circuits. He couldn't quite remember...
  19. S

    TNCS Dist CCT. to TT installation - front end protection question.

    Good Morning everyone. Quick question regarding a sub main from a TNCS supply feeding an outbuilding on TT. This is a domestic installation not agricultural. TNCS supply to house feeds High Int. CU from which 4mmsq 2 core SWA feeds an non attached rear building. THE SWA of the sub main is...
    • slipnduck
    • Thread
    • front installation protection question
    • Replies: 7
    • Forum: UK Electrical Forum
  20. A

    RCD protection for new pool heat pump

    Hi there all I have a quick question. My garden supply CU has a 100A AC RCD as main switch - off that is my greenhouse supply circuit. Then a 63A AC RCD which protects 7 circuits, one of which is a pool heater. I am replacing the old heater and the new one requires residual DC protection...
    • AussieP
    • Thread
    • heat heat pump new pool protection pump rcd
    • Replies: 11
    • Forum: UK Electrical Forum

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