protection | Page 6

protection

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  1. B

    DIY Extension lead in hose pipe for external power to shed

    Hi all, looking for advice, based in the UK. I have a 30m long garden with shed at bottom that I want to run an extension lead to on a permanent basis. Use is for power tools (drill, jigsaw) plus lamp in the winter so neither constant nor heavy usage. Currently I run a single 40m reel...
  2. L

    Coding for lack of 30ma rcd protection - TT system

    I’ve had a disagreement with a colleague on this. Installation has 100ma rcd main switch. Some circuits (5) on this side and further 4 on the 30ma rcd side. what is the coding for this?
  3. Mark42

    Does a 3 Phase socket supplying a Portacabin's 30mA-protected DB still need its own RCD protection?

    This month I'm building a remote lab for specialist chemistry work, in a self-contained 'Portacabin' type building. The cabin will have a new, Hager 3 phase board, with an 30mA RCCD main switch. It's only a single small room so I'm not bothered about the possibility of the whole installation...
  4. SJD

    When did sockets require RCD protection?

    Can someone tell me when it became a requirement for sockets (domestic property, use by ordinary persons) to have RCD protection. Or rather, a flat completed (first sold) in Sep 2007, with no RCD protection for anything - would that have complied at the time. I don't have any earlier regs. that...
  5. Dave Appleby

    Cable protection

    Morning all. Just a quick one. I've put several sets of cameras in a retirement complex in what can euphemistically described as a rough area. I've used Nylock to secure the connections. However, these are bungalows and I am worried about the short cables exposed before they enter the...
  6. B

    High Zs RCD for fault protection?

    Hi, kind of follow on from my last post, but my boss hasn’t explained very well hoping you guys can High Zs on circuit, Can you reply on an RCD for fault protection? He’s told me if the circuit is RCD then you can use that as fault protection, obviously you can’t meet disconnection times for...
  7. bigspark17

    Submain rcd fault protection

    If a 2 core swa was run for a submain to an outbuilding with no extraneous parts in it, but the zdb reading was well over the maximum earth fault loop impedance. Could an rcd time delay be installed at supply end to cover the submain ie increasing its new maximum zs reading? Hope thats clear ?
  8. N

    Lightning Protection Certificate

    I would like to have sample of the lightning protection certificate. Please assist me. Regards Thanda
  9. F

    Ireland ET101 earth bonding - mechanical protection

    Good morning, I'm looking for answers to these two questions about Ireland ET101 standards, since I can't seem to find specific indication: - Should the metal frame of a plasterboard wall /drywall positioned inside a room of a building be earthed as a main equipotential bonding? - Wirings...
  10. J

    Does workshop equipment such as lathes require RCD protection.

    Does workshop equipment such as lathes and mills Need rcd protection?
  11. M

    Zappi car charger open PEN protection

    Hello, As far as I can work out the Zappi car charger protects against PEN faults buy having a current sensing coil around the protective earth conductor and if a current is detected on the conductor it will disconnect the L, N and PE conductors. just wondering how this meets the regs as in...
  12. C

    DB RCD protection

    Hi, In my DB there is a main switch and one 80 amp RCD. Does the RCD protect the lighting circuits also ? Thanks
  13. D

    Surge protection Requirements

    Excuse the probably stupid question! I'm a bit out of date, so not yet up to speed on 18th edition. Been prepping for a domestic board change, but am confused about whether I need an SPD or not. Seeing as the majority of suppliers are selling their boards without the SPD, I'm assuming they're...
  14. The apprentice

    degree of protection?

    Hi there iam currently wiring a commercial pub kitchen was just wondering the degree of protection for enclosure like 3 phase isolators etc just for my own peice of mind thankyou
  15. B

    How does the overvoltage protection from AFDD works?

    So i know the arc detection is made by a MCU. The overload and overcurrent by a magnetic coil and bimetal. But what about Overvoltage ? I only know it works for >270V.
  16. L

    411.8.3 Requirement for Fault Protection

    Where fault protection is provided by an RCD, the product of the rated residual operating current (IΔn) in amperes and the earth fault loop impedance in ohms shall not exceed 50 V.
  17. S

    No RCD Protection

    Hi all, I got job which client ask me to replace 20 down lights and install new bathroom extractor fan but DB is not RCD protected.(client dose not want change DB ) can I do my job without changing DB or I must change DB? Thank you
  18. D

    Polarity Test - Extension Lead (surge protection) - Failed

    Hi all, This has got me stumped as it's the first time in 8 years this has happened. I undertook a 250v test on a brand new recently purchased Surge Protection extension lead - all is well but on each of the 6 sockets it failed the Polarity Test. Tested the IEC Lead and all was fine so not that...
  19. S

    Can I omit the SPD on this rewire? + Rant

    I'm about to rewire an empty house, with no electronic equipment or anything else plugged in or installed. Does this mean I can omit installing an SPD because the value of the equipment that could be damaged is less than the price of installing the device? "For all other cases, a risk...
  20. R

    Screen protection on instruments

    The original screen protection stickers that stop the screen from getting scratched on my multimeter and insulation tester were starting to fall off. As an experiment I bought a packet of cheap mobile phone screen protectors, cut them to size and fitted them to the meters. That was a few months...

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