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  1. cliffed

    TT System with Upgraded DB/CU

    Big argument with a newly qualified electrician with all the necessary qualifications Had to give him a hand later on during the day, nice DB fitted &to be fair quite tidy too , with SPD…It’s a TT System with a good Ze 24.8 ohms. All Rcbo’s except for the Mcb supplying the SPD, which I pointed...
  2. M

    Remote control for Bell 801 door entry system

    Hi. Looking for help. My FiL has moved into a block of flats using the Bell 801 door release intercom for opening the main communal door to the flats. We have no opportunity to change the system for the whole block of flats. He is 80 and paraplegic and cannot get out of bed to let his carers in...
    • mikerreed
    • Thread
    • bell control door entry remote system
    • Replies: 2
    • Forum: DIY Electrical Advice
  3. S

    Heat Saver system what is it?

    Hi. I'm on my way to remove a faulty one of these. A 'heat saver' device fitted to a boiler. I haven't seen it yet but it seems to be a relay connected to a boiler thermostat. Has anyone seen these before? I'm guessing I can remove it all and just hard wire the system so it doesn't interfere...
  4. W

    Solar Solar system - Hybrid inverter in a shared RCD

    Greetings, I have a solar 5kw system installed with a hybrid inverter (no batteries yet). My electrician decided to add an extension board for the solar installation as my main CU couldn't fit all the required switch due to lack of space. I have dual rcd consumer unit with no high integrity so...
  5. P

    2 pumps on one system

    Hi there, the heating system I am working on has 6 zones and valves for each zone which was working fine with one boiler and one pump. some rads weren't getting hot so the plumber has installed 2 x pumps, one for 3 zones and another for 3 zones, the problem is I originally had all the oranges...
  6. M

    Multizone Hive wiring for S plan system

    Hi, I’m not an electrician or a plumber, but I am confident diyer and am not completely incompetent! I have a new build house with a boiler/hot water system which I believe is S plan. There are 3 motorised valves (one for downstairs heating, 1 for upstairs and 1 for hot water). So it’s a dual...
  7. I

    Three phase equipment RCD protection on a TT system

    TT system, existing three phase fuse board recently installed by another spark which only has single phase circuits terminated into individual RCBOs Required to install three phase circuits for new equipment, is there a better way of doing this than fitting a 4pole RCD ahead of the main switch...
  8. F

    Solar system issue. Please help

    Good morning all, I don’t understand why my battery has been charged from AC to 23% every time. Charging from AC is disabled in the app. I was told it’s because we do have not enough sun at moment to keep the battery on a safe lever (safe level of 23%?). There is no information about that...
  9. LouiseSJPP

    Near off-grid system: question on grid input

    My little house in Spain sits in the forest and has a little wire from the electricity supplier, 20 amps max. It's a fragile link, caught up in trees which fall down regularly. I'm planning to renovate this house with lots of PV on the roof, and make it is independent as I can of the grid...
  10. T

    Van der valk rail system - good or not

    Has anyone used van der valk rail system - specifically pitched roof with their hooks & is it good? Thanks
  11. T

    Heatmiser heating system issue. Online/on-site(£) help needed. Oscilloscope?

    Hi everyone We have a little problem with a heating system on one of the projects (quite big house in south Kensington) and we are looking for someone who might be able to help. I'll try to make it as short as possible. Heating system is based on heatmiser touch v2 thermostats sitting around...
  12. J

    MCBs ADS in TT system

    Quick Question. Despite being 50 I am a newbie electrical installer. Preparing for my retirement from public service. Anyways - my Question. How the hell do MCBs work on a TT system. Say Ze is 33 Ohms with a 240 supply the PFC will be just over 7 Amps. How does that trip MCBs or is there were...
  13. Rocboni

    UFH8 or UFH8N system

    I recently wired a heating system with a UFH8 manifold and an unvented cylinder.... easy. Well it threw up a few problems. Initially I had the time clock live feeding the UFH16, ugh zone valve connected to the valve connection and fired the boiler with the volt free on the pcb LS and LR. Circ...
  14. newfutile

    Type of earthing system

    This states a SNE system, do I list this as a TN-S system. The heads look the same as the PME types. Our NICEIC area engineer was also not sure about this!
  15. J

    Is it ok to have PV system into shared (household) RCD?

    Is it ok to have PV system into shared (household) RCD? So I've had a system installed, but not yet complete/signed off. The issue is that the PV (and a car charger) are wired into a shared RCD (with water heater, boiler and downstairs sockets). When all breakers are on, the system trips. It...
  16. S

    Suspected Broken PEN conductor on TNC-S system

    Hello everyone, I’m based in the ROI and live in a rural location. Yesterday evening my electricity supply started to switch on and off randomly. After waiting for the evening for it to come back on it still has not. I checked my neighbors who are on the same DSO as my house and they all have...
  17. T

    Grid Tied generator system

    Re:Grid tied System. Could someone advise please on the following. I wish to install a 3 phase (input) Grid Tied system to my home (2 - 5kw). My problem being that I'm told that a certified (SEG) Company needs to do the installation, although I know I'm capable of carrying out this job. Plus...
  18. W

    Replacing 100A RCB on Heatwise System

    Replacing 100A RCB on Heatwise Switching System. Hi everyone. I am new to the forum. I have a 22 year old system which a relatively new economy 10 meter linked to a Heatwise switch / contactor which allows off peak electricity charging for hot water / electric boiler etc. We get 10 hours of...
  19. R

    Advice on my installed solar system - missing optimisers?

    TLDR - I have a system that is supposed to have optimisers fitted, but I am not sure they have been fitted. The detail: Back in March I had a solar system installed. It was installed on two outbuildings, and as one of the outbuildings has a tree near it which can cause some shading, I was...
  20. R

    Smart Heating System - Heatmiser or other?

    Hi all, I have a slightly mish-mash heating set up, in that downstairs I have wet underfloor heating with an individual thermostat per room, but upstairs it's a single thermostat for the entire floor with normal radiators with TRVs. I want to be able to control the temperature in each room...

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