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  1. ElectroChem

    Interesting video on testing type "A"'s RCBO and issues with MFT 's

    I quite liked the ECA guy's point - we're not out here popping fuses or even tripping breakers 'just to check they work' - we trust that reputable manufactures have made a product that will work as specified when it needs to. If we can't be sure an RCD will work properly unless it's tested every...
  2. ElectroChem

    When is 3x80 amps 25kVA?

    I suspect that a single cable size and 80A fuses are just the standard install package the DNO puts everywhere. As long as the cable is properly protected, then perhaps you can pull more load than you officially should, depending on how granular the feedback from the meter is.
  3. ElectroChem

    When is 3x80 amps 25kVA?

    Just because the DNO has fitted fuses that can handle more than 25KVA, don't just load up and go. You may end up with a sternly worded bill including a charge for exceeding your allowance.
  4. ElectroChem

    High power manually-reset thermal cutout solution

    You are correct that general purpose relays top out at around the 20-30A mark.The component you're after is called a contactor. These are essentially bigger tougher relays with contacts designed for making and breaking large currents and voltages, and can be found in ratings of 1000A or more...
  5. ElectroChem

    Best clamp meter to get started?

    Indeed, if the 3% accuracy rating in the earlier post is true then on the 2A range the screwfix meter could be out by well over 30mA and still in spec. Hardly inspires confidence down to single digit mA leakages.
  6. ElectroChem

    Battery tools.

    Theoretically, if I asked my boss he'd supply a basic set of power tools. No way is he going to stump up the $5000+ in tools and meters I carry in my work vehicle. Plus, I have my own preferences for how I like to run my setup, and this way if I move on to another position, I don't need to...
  7. ElectroChem

    Any good resources/videos for 3 phase or industrial stuff?

    Quite a bit to cover here, but I'll do my best. Background: I'm an industrial trained electrician coming up on 8 years in the trade. In Australia we have to do a full 4-year apprenticeship to be trade qualified, so some aspects of my training will be quite different to the UK. Like do you take...
  8. ElectroChem

    Any good resources/videos for 3 phase or industrial stuff?

    If you want some laughs on the high-power side of the trade, try Photonic Induction on youtube. He's just recently come back from a few years break, heaps of fun to watch him play around with (and more often than not destroy) some gear.
  9. ElectroChem

    Multimeter Recommendations

    I use a Fluke 117 as my daily meter, though it does not have the mA range you requested. Not sure how widely available they are in the UK, but have you looked at the Kyoritsu range? I started my training with a 1009 that was under 100 quid, and have a 1012 now that I break out when I need mA...
  10. ElectroChem

    Starter unit any ideas

    Looks to me like the earth is taken off the armour. The blue is connected straight through to the outgoing wire. I'd say the green/yellow tape is just covering some insulation damage (you can still see exposed copper next to the tape). Still not good.
  11. ElectroChem

    is it really worth completing my apprenticeship/becoming an electrician.

    If someone's been working with you for four years and you have to hold an interview to decide if they're worth keeping on then I submit the answer is 'no'.
  12. ElectroChem

    Saw this on my local news , looks like a road worker got a nasty zap

    Much like the historical distinction between being hanged and hung. Give us a nice single word for 'injured by electricity' and we'll all get behind your push to standardise it. :)
  13. ElectroChem

    2.5mm flat cable with a sleeved CPC

    Can 4.0mm take 37A when the ambient temp is a 50 degree roof with insulation laid over the top? We've had to derate our CCC fairly heavily because of that yellow death-orb overhead.
  14. ElectroChem

    2.5mm flat cable with a sleeved CPC

    Indeed we do. Twin and Earth with G/Y insulated earth is standard here. Same size earth from 1mm-2.5mm2, then smaller from 4mm+. Biggest I've seen was 16mm, but 6mm is the largest in common use for things like 32A oven circuits.
  15. ElectroChem

    Sharing a room when working away?

    One of my directors actually just asked me this this other day. My answer? "I'm cool sharing, but fair warning: I snore."
  16. ElectroChem

    how to wire up 120 coil to replace a hoist toggle switch

    Yeah... so are we. Which means I'll take a hard pass on supplying a circuit design to a self-admitted DIY and telling them "Have at it, lad." Your profile says you have an EE Bachelor's. Do they not cover electronic circuit design any more?
  17. ElectroChem

    UK How to wire a panel transformer

    Protip - when your opening question is "How do I wire this idiot-proof piece of gear" which you then followed up by implying you have no idea how control circuits work, best not to go for the trifecta by trying to neg the old master of the forum.
  18. ElectroChem

    Do transformers produce more power than what is put in?

    I'd be very interested to find out, just let me know when you plan to try so I can be at least two counties away. Not quite. The mathematics of three-phase power conversion go a bit past basic Ohm's law. Transformers, as a reactive device, are usually rated in KVA (volt-amps) not KW. An...
  19. ElectroChem

    Do transformers produce more power than what is put in?

    50kA in reference to a transformer is likely to be the secondary circuit prospective fault current. I.e. if you bolted a copper bar across the terminals you could (briefly) pull that much current before something (hopefully a fuse) went bang. A 11kW/55A primary works out to about 1MVA, so I'd...
  20. ElectroChem

    3-Phase Multiple Questions NZ

    Talk to your electricity supplier. As @snowhead said, the best outcome will be if you have 3-phase overheads in your street and there is enough spare capacity to give you two more phases of say 63A each. Also keep in mind, your kitchen/trailer will need to adhere to the requirements of AS/NZS...

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