protection

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  1. C

    MK spd overcurrent protection

    Hi guys, I want to fit an MK spd, one of their 2-module type 2 H6820s and I can't find anywhere what kind of overcurrent protection to fit with it. Looking at the data sheets, they mention overcurrent protection being 50 kA - but that's not what I mean; what (if any) mcb should I fit with it...
  2. D

    Overcurrent Protection (iii)

    It is said that "a picture paints a thousand words", so I am attaching a couple of thousand words for your perusal.
  3. D

    Overcurrent protection (ii)

    How do we protect an electrical circuit from 'a large overload of a short duration'?
  4. D

    Overcurrent protection

    How do we protect an electrical circuit from 'a small overload of a long duration'?
  5. C

    surge protection

    i did electrical for industry for years as a machine repairman and did not know much about surge protection with plug in surge devices. so we never did use them. in fact they are not required in our area yet. but i learned of them as new machine started to come in with surge protection...
  6. LmarshallSparks

    TT - Consumer Tails Protection

    Quick question, Do TT earthing systems consumer tails require RCD protection? I believe they do, but I rarely see them on short tails? Does it only apply when the tails are over three meter? Thanks for any help electrical masters 🙏
  7. C

    SWA protection with off peak

    Hello, Been to look at job, a barn that's been converted into separate flats. Each one is fed by a 10mm 3C SWA. On peak, off peak and neutral. Currently they just have a double pole main switch for isolation but no protective device. Is there a nice little unit I can use that's designed to deal...
  8. S

    Off grid consumer unit protection query

    I’m at a house just now, the guy has decided to go off grid, got a company in to take care of all that side of things. There’s a shed outside with all singing all dancing off grid solar kit (looks like the inside of a space ship!). The company took an SWA supply from there into the property &...
    • SSE
    • Thread
    • consumer consumer unit grid off off grid protection query unit
    • Replies: 10
    • Forum: UK Electrical Forum
  9. nascocorp

    How Cable Cleats Revolutionize Cable Management: Key Benefits Explained

    In what ways do cable cleats transform traditional cable management practices, and what specific benefits do they offer in terms of safety, durability, and efficiency in both residential and industrial applications?
  10. S

    UK Is the main fuse head satisfactory protection for SWA supply cable?

    Commercial/Industrial installation. Summary of installation: Main feeder pillar contains TNCS incoming supply single phase 100A main fuse, 25mm DNO tails, meter, 100A double pole isolator switch, 25mm tails/16mm CPC to 63A rotary isolator, 10mm SWA cable 25m run to digital advertising panel...
  11. G

    UK Relevance of Table 41.3 where Additional Protection is present?

    Reading of 411.3.2 and following suggests that compliance for disconnection <400ms may be obtained using either MCB or RCD. Where an RCD (RCBO in this case) is used for Additional Protection, is compliance with Zs specified in Table 41.3 still necessary? The situation: new installation by...
  12. sythai

    Garden lights... IP68 + vermin protection

    Hi Guys Just seeing what you all use use for buried garden light connections, to seal up fully from the elements/ vermin? Been using 3M gel connectors for a while without any issues...
  13. Calebp43

    Surge protection on wind turbines

    I have recently been asked to surge protect a family friends wind turbine. It's about 30-40foot high and it's something I've never done before. Any ideas? I have done a lot of looking into it and it looks like a much bigger job than I originally thought. I've read that it will most likely need...
  14. V

    surge protection for heating system

    last week, houses in the road had a power cut one evening, although we hadn't at that stage...then, in bed near midnight, we were dozing, then heard a loud pop in the hall....got up and smelt a very strong electrical burning smell (we were also then without power), it was coming from the...
  15. B

    UK RCD Protecting Distribution Cables on a TT on Industrial Estate

    Hi All, I'm looking to pick the brains of experienced engineers who have dealt with TT more than I have please. We have an installation on a site which may or may not be unique. There are four 12m x 12m units inline with each other, all connected as one building, with the plan to build a...
  16. woodster92

    Mechanical Protection for Tails between Meter Cupboards on outside wall

    Hello, what products are people using for suitable mechanical protection in compliance with regs for the following job? Existing Meter Cupboard recessed into outside wall adjacent to driveway on a domestic property with incoming Mains Supply, Meter and Tails. Requirement to add an additional...
  17. S

    Communal DB does it require RCD protection to be a sat EICR

    Question is does this DB really need RCD protection as there are only internal lights and sockets supplying this large building that used to be a mansion and is now 4 flats. heres the DB its labelled L/L on the right only providing 3 light pendants a timer light and 2 single sockets all in the...
  18. Electreacle

    RCD protection upstream?…

    Evening everyone… I’ve attached pictures for your leisure.. so basically the customer does not have any RCD protection.. 3036 fuseboard is in situ.. they want an outside socket.. I’ve told them that I can’t install one as there’s no RCD.. they’re asking if there’s any alternative ways safely...
  19. S

    open PEN protection.

    Would any fellow electricians consider using an open PEN device to protect a metal trailer used as a "Canteen". It is likely to be often connected to TNCS (forbidden by 717.411.4) and placed on concrete which makes the use of TT and rod impossible. I can draw similarity to an EV charge point...
  20. Brownie91

    Is RCD protection required on SWA supply cable to EV?

    Hi all, I am at odds on whether RCD protection is required on an SWA of 14 metres, clipped direct under flooring direct from CU to an exterior Tesla EV charger. The Tesla charger is three phase and to be a 22kw supply at 32A. TESLA SPEC: The wall charger itself features a built in RCD Type A...

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