system

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  1. E

    Auto transfer switch caught on fire - should we be concerned about our house electrical system?

    Here’s what happened, we’re looking for a professional opinion: The auto transfer switch for our Generac stand by generator “exploded” (we heard a bang and the house shook a bit) and subsequently caught on fire earlier this week. It was mounted to an exterior wall. The generator was installed 8...
  2. F

    Heating system is via an air source heat pump.

    We have just completed a self build, and heating system is Air Source Heat Pump, unvented HW cylinder, Buffet Tank, all Vaillant equipment. The heating firm have ceased trading before the system has been completed and fully commissioned. Ground floor is UFH with 6 zones controlled by Heatmiser...
  3. 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...
  4. 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...
  5. 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...
  6. 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...
  7. 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...
  8. R

    Adding PylonTech batteries to a system with a PW2

    Good Evening All, I'm not an electrician but I'd like to pick the brains of those that are please. Note I intend getting a qualified electrician to do the installation work, this is not a DIY job. I have a SolarEdge based 10.7kW Solar PV system and a Tesla PW2 c/w Gateway and am export...
  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. CCinPA`cr

    Visonic Powermax (Check system for troubles)

    Removed the associated phone-line. How do I permeably silence this message?
  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. 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!
  14. 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...
  15. 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...
  16. 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...
  17. 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...
  18. 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...
  19. M

    The names of the parts for PLC System

    SNMP or Modbus TCP/RTU Protocols to connect the PLC to external HMI LCD HMI LCD with graphical representation & ability of issue control commmands power supply for all system components with backup batteries built in web browser (http/https) Different users' levels SNMP protocol Email...
  20. 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...

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