system

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  1. HappyHippyDad

    Adding an earth rod IN ADDITION to a TN system

    I have just watched one of John Ward's interesting videos - It all makes sense apart from one of the final points involving adding an earth rod to an existing TN system. Not making a TT, but using the rod in addition to the TN system. This part is at 20 minutes and 8 seconds if you want to...
  2. N

    Fire panel required for Category M system?

    I am doing renovation to a cafe in Scotland at the moment and after speaking to the local council the building requires the minimum standard for a fire alarm system - category M which is manual system with no automatic detection, just 2 call points and 2 sounders. Basically i was wondering do...
  3. C

    Do you think energy storage system with Lithium Iron batteries is the big trend in the future?

    I think it's a big trend in the future. lithium ion battery wall 50 become increasingly popular ever since the announcement of the BYD Blade battery technology, which comes with a lithium-ion phosphate (LFP) chemistry instead of the nickel manganese cobalt (NMC) mix. But I heard others say that...
    • cherry
    • Thread
    • batteries energy future iron lithium storage system
    • Replies: 7
    • Forum: UK Electrical Forum
  4. N

    Older home with no grounding system and pool pump

    Installing a small above ground pool with a 1/2HP 120v pool pump. The house is older and has no grounding system that I can tell. Outlets are two prong. I know I need a gfci outlet to plug pump into but will this be safe and work as intended with no grounding system and only a hot and neutral...
    • nncognito
    • Thread
    • grounding home older pool pool pump pump screwfix system
    • Replies: 3
    • Forum: UK Electrical Forum
  5. HappyHippyDad

    Any recommendations for a simple CCTV and alarm system to fit?

    Hello all.. I have been considering CCTV for a while. We have had a few break ins recently, so it's time to actually do it! I'd like to try and do it myself, so I'm looking for a pretty simple CCTV system and perhaps an alarm. Any suggestions chaps? 🙂
  6. J

    Old Honeywell heating system: no idea how to turn on.

    I've just moved into a new flat and for the life of me I can't figure out how to get the underfloor heating turned on. The thermostats are the old honeywell analgoue types like the picture below. I turned it up to the max temp, but the floor is still ice cold. I've also taken a picture of the...
  7. E

    Help please - additional PV 400w panel conflicting with the existing 2kW system

    Hi all, total newbie to the forum. I sincerely hope that those in the know-how would be able to assist me. On my semi-detached house we have an existing 2kW system (8 panels, 250w each), this was installed 9 years ago, with the inverter SMA Sunny Boy 2kw (SB 2000HF-30), and recently we added a...
  8. A

    Unexpected/weird On/Off switch behavior in 12v DC System

    Here's the setup: 400ah battery bank on 12v has a positive line that connects to a 400a fuse, then to a Blue Sea On/Off Switch, then to the positive Bus Bar, then to the Fuse Box, then to the Loads. Loads come back on the negative to the Fuse Box, then the negative Bus, which goes to the...
  9. D

    Cables run in Wolf Easi joist system

    Hi Guys Im wiring a domestic dwelling that has the Wolf Easi joist fitted. The central web is great is running services, but how do you fix cables running with and at the normal to the joists? My first thought was mini trunking say 100 by 100, then we should to do grouping calcs. Why trunking...
  10. 123

    Old Domestic Servants/Butlers call system

    I'm just in the process of starting a rewire in a 1930's house, and the new owner has asked if the old servant/butler call system could be put back into service. It's not functioning at present, but I've not looked into any detail as to why. Anyone familiar with how they are supposed to work?
  11. R

    Grade A ld2 system in self contained flats

    Hi there, I am the freeholder of my flat. There are 2 other flats. In the building, it’s a converted terrace house. The council have instructed me to install a grade a ld2 system. I have no idea what this means. Can anyone explain what the requirements are to appease the council? I’m a...
    • Rhian_o
    • Thread
    • fire alarm flats grade self system
    • Replies: 10
    • Forum: UK Electrical Forum
  12. Y

    Alarm System Risco Group Wisdom

    Hello! I ve been moved into a new house in which my previous owner doesnt remember his code The alarm system is from wisdom group Risco I would like to know if i could bypass the previous code and type a new one or if its possible to reset to default If none of these can happen please let me...
  13. J

    Battery Extra PV system & a wiring issue with battery CT?

    Hi everyone, I have a quick question if I may? I'm thinking of adding a second PV system to my existing rooftop PV & battery setup. As the parts will be second hand due to lack of FITS & poor export prices, I'd like to install as much as I can myself to save money (I've already bought the...
  14. G

    TT Eathing system to be installed

    Will a TT earthing system be complicated to fit to a block of 6 flats and 1 communal area And is it expensive UKPN have told me this is there preferred option rather than a new supply from the road which would be very expensive
  15. S

    Battery Solic 200 alongside Battery system

    I've seen similar questions but not one that specifically answers my question. I have a Moixa battery system in my house that uses a clamp sensor on the live feed to use excess solar power to charge batteries, that's all fine of course. Problem is, and you may guess this, when I fit the...
  16. M

    Safe system of works around pv array

    Due to an incident of an induced voltage on the array framework and someone getting a shock what’s people safe system of works in place to minimise this happening ?
  17. msibart

    Old helvar system for sale /spares

    Hi all, I have moved into a house which had a helvar system for lighting, digidim router, wall controls, 3 dimmer banks. One dimmer bank stopped working but that leaves 32/36 still functional. I had a helvar engineer out and they confirmed this sytem would still drive LEDs as well retained...
  18. Raptor0014

    Advice regarding isolator for 3ph TT system

    Morning all, I’m scratching my head with this and granted I don’t do a lot of commercial work. Hence I thought I’d ask. Setup is a pub with a 3ph supply and it’s TT So it goes Incoming head - 3 x 100a cutout Meter 3 pole isolator for L1, L2 & L3 L1 to single phase into plastic DB L2 to...
  19. timhoward

    IT system - how do RCD's ever work

    To avoid distracting another thread... @Julie helpfully said that an RCD can be used with an IT system to achieve disconnection after the second fault. I'm not understanding how. If both faults are between transformer and a load it just becomes a parallel path with negligible resistance, and...
  20. L

    IT earthing system cable calculation

    Hello, Does anyone know if Trimble can be used for cable calculations for equipment with an IT earthing system? If not could you please point me in the direction of an example calculation if possible. Thank you

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