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  1. davelx

    C&G 8202 past exam paper question. Cable calc.

    IMO that's a bit backwards. It's the CCC of the cable that is reduced by a higher Ta, not the current rating of the OPD. Their reasoning is that you have to apply the correction for 3036 fuses that way so you might as well do them all that way. Who uses 3036 fuses these days? As you suggest, I...
  2. davelx

    C&G 8202 past exam paper question. Cable calc.

    You're applying the ambient temperature correction factor to the wrong thing - you apply it to the CCC of the CABLE not the OPD. You just need to check that the corrected CCC of the cable is still >= the OPD rating. The CCC of the cable is 36A method C @30C. You apply the ambient Ca correction...
  3. davelx

    can you use 3 phase SWA cable for 230vAC single phase?

    Without corroborating information, the answer to any question about anything given by anybody, especially on a forum, could be correct or incorrect, regardless of qualifications or otherwise.
  4. davelx

    Internet speed - WiFi v wired.

    I mean people who want 900Mb/s + speeds, not 150M, I have that and it speeds up software updates and video uploads to YouTube very nicely. I started out with Demon Internet and a 300bps acoustic coupler.
  5. davelx

    Internet speed - WiFi v wired.

    Indeed. I can't understand this obsession with bandwidth unless you have a houseful of UHD video streamers and gamers! The ISPs must love it.
  6. davelx

    Draining an indirect cylinder to change a faulty zone valve

    Why do you need to drain the main cylinder if the valves are on the primary?
  7. davelx

    Testing a Boiler Thermistor

    It's not like thermostat. A thermistor changes resistance with temperature, it doesn't have contacts. If you can find the nominal resistance from documentation, you can check it with a suitable meter.
  8. davelx

    RJ11 pinout

    If you disconnect the incoming analogue line from your existing master socket and connect the line from the router to 2 & 5 on an extension near the router it should work. Mine works fine that way. Or move the master socket to where the router is, BT won't know or care.
  9. davelx

    RJ11 pinout

    Yes. Modern phones don't need a bell wire and bell wire can cause issues or speed reductions with adsl. Best disconnected at every socket.
  10. davelx

    Strange Socket In Hospital

    Very unlikely each outlet on a twin pate would be on different circuits. I've seen plugs/sockets with "T" shaped earth pins used in hospitals for connecting medical equipment t deidcated/clean earth supply. You can still get them ...
  11. davelx

    RCD trip with Live isolated

    More likely you accidentally caused an NE fault when manipulating the cores, but not impossible. (GMTA )
  12. davelx

    Tall vs compact RCBOs

    Also many brand's compacts are bi-di
  13. davelx

    Editing DVD / .ts videos

    Shotcut is good but I prefer KDEnlive.
  14. davelx

    Fluoresent or LED

    My street was done about 8 months ago and the improvement in light coverage and quality over the old yellow sodium lamps is immense. In addition there is much less stray light both upwards and sideways. They did a one for one replacement of the existing lights, each one took about thirty...
  15. davelx

    Mystery Wire Switched Fuse Spur to Blank

    If there is only a single cable connected to the FCU then just remove that too. Then you can remove the unused back box, fill and decorate over.
  16. davelx

    Office 365 home

    Have you read the q&a on that offer. There's a severe restriction right at the bottom.
  17. davelx

    Measuring resistance with Ohm's law does not work with sensors because? Does anyone with knowledge about alarms have an explanation

    What I was getting at is that all power sources have internal resistance and the available voltage will be split across the internal resistance and the load. This will be the case even if the load is just a simple resistance. For example, suppose you have a 10V supply and a 1000ohm (1k) load...
  18. davelx

    Measuring resistance with Ohm's law does not work with sensors because? Does anyone with knowledge about alarms have an explanation

    How are you powering the circuit? The source impedance of the supply could be skewing the readings.. A diagram would be helpful
  19. davelx

    New skool phone wiring

    So it's not just me, then!
  20. davelx

    New skool phone wiring

    What I did was to get OR to install the NTE 5 with the unfiltered faceplate, then I ran a normal phone extension from that upstairs to where I wanted the router, where I installed a NTE 5 with filtered faceplate to which I could connect both the router and a phone. For the dowstairs phone...
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