system

  1. S

    Selecting the proper solar panel/ battery system for 12v LED strip

    Hi all, Complete novice here, but I'm trying to learn. I am making a solar powered, back-lit estate/ driveway entrance sign, and am stuck regarding the correct wattage, amperage, etc for the panel and battery. I'm planning to use 5 meters of 12v 18w strip, but would like to be able to use...
    • Sign Guy
    • Thread
    • 12v battery led led strip panel proper solar solar panel strip system
    • Replies: 1
    • Forum: Lighting Forum
  2. C

    Disconnection Time for IT system

    What is the max disconnection time for an IT system? I think it would be shorter in that an MCB would only be triggered after a fault on two individual circuits hence double the loop impedance?
  3. cliffed

    Lighting system in open plan office

    Open plan office real dated lighting system...refitted led panel lights..each desk operates their lights over their desk, via a pull switch. Some have their lights on some off....is there any system that could work without using pull switches.
  4. S

    Advice on TT system

    When carrying out Ze with main earth disconnect I get a reading of 77.25 ohms. All good. When main earth is reconnected and all parallel paths in place reading comes down to 0.60 ohms. I have 3 lighting circuits not covered by an rcd all Zs readings are well in permitted Zs. Would any body apply...
  5. I

    TT system, earth to neutral not tripping RCD

    TT system, Zs on socket circuit is 77.2 down a good bit after I added a second earth rod. When I short neutral to earth RCD doesn't trip. Can anyone help me out and explain please.
  6. A

    House earthing from an off grid solar system

    Hi everyone, I live well off grid in Wales and am presently renovating a small property. As part of that renovation I have had a full off grid solar system professionally fitted coupled with a generator back up. The inverter charger has a neutral earth link as does the generator. The inverter...
  7. C

    Hi. I could use some official advice . Is the Old Twin Mains fuse system considered unsafe and worthy of a C2 on a Condition report?

    Hi ! I could use some official advice please. Is the old Twin Mains Fuse system considered unsafe and worthy of a C2 on a Condition Report ? My feeling is that it's technically unsafe. I'm wondering if it could be classed as a C3 if the rest of the installation is ok, only because I'm under...
  8. T

    Can you use a 240V breaker on a 600V system?

    This is hypothetical, I am just curious. Please give this some thought. I have a 600V, 5HP motor (3728.5 Watts) and a 600V panel I want to supply it from. If I use a 20A, 600V breaker - the breaker will see ~6A on motor run. (P/V=I , 3728.5/600 = ~6A) If I use a 20A, 240V breaker - the...
  9. A

    Smart alarm system recommendations

    Hello, I would like to upgrade our existing, wired, burglar alarm system for smart alarm system. We don't use it as the cat keeps setting it off, although it works fine. Rather than just get pet PIRs I would like to upgrade the whole system. I don't want to go down the WIFI or hybrid route, so...
  10. N

    Does anyone recommend a CCTV system?

    I've been seeing on social media the past few weeks that there have been a few attempted break-ins to people's property. Does anyone recommend a certain type of CCTV?
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