protection

  1. dodger421

    Inline Surge Protection?

    I've been asked about providing inline surge protection for the UPS supplies in numerous network cabinets around our factory and I'm hoping someone more experienced in this might have some suggestions. There are about 15 cabinets dotted around the factory containing various switches and routers...
  2. Weezy

    UK RCD protection to Meter Tails?

    About 20Meters of 25mm meter tails are routed though the floor boards feeding a sub main. To protect the tails under the floor i was going to fit a Mini Metal Unit with RCD protection Fused at 50A at the mains position, Just wanted to check to ensure it’s a 30ma ‘S Type’ RCD i need? As the c.u...
  3. cliffed

    Rcbo/Rcd protection

    The new breed of sparkies think that if the Zs is high,just stick a rcbo/Rcd on that curcuit. Back 20 years ago there was no way you would do that. Interesting in the code book by Napit,thus is what it says. Opinions plz
  4. C

    Surge protection required?

    My full time job is a maintenance engineer, part time, I'm small domestic electrical work. In the factory where I work contractors are installing new circuits to a sub 3 phase board. Rcd has been installed after the breaker although I know you can buy rcbo's for this board. Nothing wrong here...
  5. S

    Protection of Meter Tails and Length

    Good Afternoon All, I have just completed a Periodic test on a house and have a question about the meter tails. The house is 14 years old so has 25mm meter tails. The CU is in the garage and the meter box is around 7m away on an external wall as you'd expect. Looking at it, I imagine that the...
  6. Designmen90

    IP protection

    IP65C First number: 6 - dust tight Second number: 5 - protection from water jets Why is here additional letter "C". This letter C means - Against acces to hazardous part with Tool. But, the enclosure is already dust tight "6", the dust is smaller then tool, so why this letter C is needed?
  7. W

    Mechanical protection for meter tails

    Does anyone know if there is a product for protecting mains tails in walls apart from conduit? In sure ive seen stainless steel capping or something similiar that can be earthed and is drill bit resistant?
  8. P

    RCD Protection required or Not

    Hi all, Apologies for long post. I have been asked to change two ceiling lights, an extractor fan and shaver socket in a bathroom, this is like for like but the shaver socket and lights would in the zones, therefore in my understanding it makes the job notifiable in England. There is no RCD...
  9. 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...
  10. 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?
  11. 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...
  12. 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...
  13. 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...
  14. 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...
  15. 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 ?
  16. N

    Lightning Protection Certificate

    I would like to have sample of the lightning protection certificate. Please assist me. Regards Thanda
  17. 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...
  18. J

    Does workshop equipment such as lathes require RCD protection.

    Does workshop equipment such as lathes and mills Need rcd protection?
  19. 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...
  20. 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

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