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  1. SparkyChick

    GN3 formula confusion...mistake?

    approximate r2 = (csa of live conductors / csa of CPC) x r1
  2. SparkyChick

    Conduit adapter sealing

    Not knowing what you have access to over there it's a bit tricky to answer, but I would probably use a Wiska 308 and a PVC conduit adapter that screws into the pre-threaded holes of the box. To try and seal the thread I would probably apply a sealant/adhesive like 'Sticks like shi*' to the...
  3. SparkyChick

    Industrial electrical engineer turning domestic

    Have a look at the NAPIT website and check out the documents that outline what you need in terms of qualifications to join the scheme. There is a C&G exam that covers wider building regs, as applicable to domestic, I can't remember what the number is but I seem to recall it being a requirement...
  4. SparkyChick

    Screwfix trunking Woes

    For the large stuff (50x50 and up) I tend to use Marshall Tufflex from my local independent wholesaler. I've used quite a bit of trunking from ScrewFix and for the most part it's been alright but recently... not so much... last lot I used I found similar to what you've described, utter garbage.
  5. SparkyChick

    Wago or......

    Waygo
  6. SparkyChick

    How to wire mains power to an SPDT (maintained) switch

    The problem with power figures as provided by equipment manufacturers is that they are for steady state... i.e. the device is already running. So if you consider the monitor, lets say 100W... it's a little more complicated because it's an electronic device but if you use the simple formula...
  7. SparkyChick

    How to wire mains power to an SPDT (maintained) switch

    I'm going to make an educated statement... I'm guessing that all the kit you're putting in the cabinet will be powered by switched mode power supplies... SMPs are great, BUT, they can have huge in-rush currents when first switched on. The contacts on that switch are rated at 3A... once powered...
  8. SparkyChick

    How to wire mains power to an SPDT (maintained) switch

    Firstly, if you wire the LED to the mains, it will explode... the LED in that switch is designed to run on 24v DC. Second, without more information about the application it's a little tricky to provide a definitive answer.
  9. SparkyChick

    Are many potential uses of SWA **UNEQUAL** tee connectors illegal?

    As you suggest, there is another reason for picking a larger cable... voltage drop. One of my clients has an incoming supply cable that runs for maybe 150 meters (I'm not sure of the distance but it's somewhere in this ballpark)... the main cable is I think 90mm CSA, I suspect, but cannot prove...
  10. SparkyChick

    Really struggling with RJ45 connectors.

    Totally, I just haven't made or used one in over a decade.
  11. SparkyChick

    Really struggling with RJ45 connectors.

    Back in the day, when switches and hubs weren't cheap, you could connect two PCs together using a crossover cable. If memory serves, you'd use the T568A standard on one end and T568B on the other so the cores in the connectors went something like this... orange/white -> green/white orange...
  12. SparkyChick

    32 amp cooker switch on ring main?

    @Jun Fang , Some of your posts are being moderated. When a post says something like "this is only visible to you", it's in the moderation queue waiting for staff to approve it. Please bear this in mind and wait for it to appear... posting the same thing multiple times won't speed up the...
  13. SparkyChick

    Ideas on how to install SELV LED on wireless switch?

    I'd probably use a Quinetic switch module to switch the supply to the transformer. Simples!
  14. SparkyChick

    LED Light Bar - drunken ebay purchase

    The connections could be power (a positive and negative) and some data connection (possibly data in/data out). There are some LEDs that contain controller chips and they are individually addressable and their current display is set by pumping data into them via a serial interface. This would...
  15. SparkyChick

    C2 issues? Consumer Unit & Circuit forms a Figure of 8 Rather than a complete RFC?

    The cut out is connected to the meter using a security cable set... I believe it's split concentric and essentially presents the line and neutral as metal pins out of the top of the block under the meter with the white label/red writing. At the service head end, they come in various flavours I...
  16. SparkyChick

    C2 issues? Consumer Unit & Circuit forms a Figure of 8 Rather than a complete RFC?

    Yes, but I operate in/around Cardiff and Newport.
  17. SparkyChick

    C2 issues? Consumer Unit & Circuit forms a Figure of 8 Rather than a complete RFC?

    I see you're in Swansea... is the property also in Swansea?
  18. SparkyChick

    The 'Electric gate' scam

    @meditek , As a new user, it's more than usual for the forum software (as configured by the site owner) will put your post through moderation if it contains a link. It's not uncommon for a spammer to sign up, make a few posts and then start spamming links. This approach stops that kind of...
  19. SparkyChick

    The 'Electric gate' scam

    @meditek , What codes are you getting from the control board?
  20. SparkyChick

    Wiska CU re-locator?

    I've just used one of the Wiska ones (8 x 2.5mm max cca circuits + 2 x 10mm max cca circuits) and whilst I suspect Dave's statement about the cost is totally correct, they aren't too bad. Suited the job I was doing (quite space restricted). Inside they are a little tight, would be better if...

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