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  1. Bez

    3 Phase Question

    Gotcha now I think. 3 Phase Current - I=P/V root 3 Thus I= 3000/400 X 1.732 I= 12.99/3 = 4.33A per Phase
  2. Bez

    3 Phase Question

    I'm sorry KME, your reply was helpful and for that I'm grateful, I just don't see the need for the unhelpful comments, whether tongue in cheek or not. Sometimes you can stare at a book and re-read things many times over before the penny finally drops, but I will go back and try to make sense of...
  3. Bez

    3 Phase Question

    Your reply was fine without the FFS, there's really no need. Silly me for thinking the forum was a place where knowledge could be gained by those wishing to gain it, given by those willing to share it. Cheers!
  4. Bez

    3 Phase Question

    Now that's really put the cat in! Tell me more.
  5. Bez

    3 Phase Question

    Just a little confused about the power distribution in the 3 phases. I may have this all a..e about face but isn't there only 2 of the 3 phases supplying power at any one time due to the 120 Degree differance in wave? Please enlighten as this does confuse me.
  6. Bez

    3 Phase Question

    Here goes, 1000w / 400v = 2.5A three or four core SWA Ref. Method C (Clipped Direct) 1.5mm csa carries 18A All protected by a 6A triple pole MCB
  7. Bez

    3 Phase Question

    Hi All, The Question..... We have a water/immersion heater tank, Rating 3Kw Phase : 1/3 Voltage : 230/400 Now I take it from this the tank can be connected to either a single or 3 phase supply. Now if we assume a cable run of 10m from the board what would be the cable size and breaker...
  8. Bez

    ELECSA position regarding calibration

    My assesor (Elecsa) was happy to accept Cal Card readings for my Multi-Function tester, as long as I use the same socket for RCD & Zs checks.
  9. Bez

    Todays pain in the Butt.

    Told them I will give them a couple of hours in the morning as they've looked after me, tea, sarnies etc. After that the meters running! I did make it clear at the outset there may be faults highlighted, and that it would incur extra cost.
  10. Bez

    Todays pain in the Butt.

    This is what leads me to believe it's a crossed/borrowed neutral. R1 + R2 not affected IR not affected I'm thinking that when I go back in the morning, disconnecting the sockets neutral in the board will clear the tripping, then I can set to work on some floorboards!
  11. Bez

    Todays pain in the Butt.

    Cu change today, nice and straight forward, posh new tails, new 16mm earth, Bonds to gas and water, 10 way dual RCD MK for an old Wylex rewirables jobby. Easy, NOT! Did all the usual dead tests with no traumas, popped it all together and energised, hey presto, downstairs lights tripping RCD...
  12. Bez

    17th Edition Multifuntional Testers.

    Reckon you are probably right there Specs! I coudn't tie some of the knots they get into!
  13. Bez

    17th Edition Multifuntional Testers.

    I like my Megger, only critisism being the tangly leads!
  14. Bez

    shower tripping rcbo?

    Hi, Didn't say there was a problem, just the fact that a 40A Type B RCBO will happily carry 50A all day without tripping, and 6mm cable is rated at 47A at the very best, makes me err on the side of caution. A 32A breaker would be more than enough for an 8500w load, just me I guess ----------...
  15. Bez

    shower tripping rcbo?

    Does it trip on switching the pullcord, or when the shower is turned on? Did you check connections?
  16. Bez

    shower tripping rcbo?

    Would also have used a 32A. 40A sailing a bit close to the wind for me with 6mm
  17. Bez

    WHEN'S IT GONNA STOP !!!!

    Interest Rates Go up Less money around to play with (unless you're a banker!) Less money around = less spending so goods get cheaper (in theory) Inflation comes down.
  18. Bez

    Strange board

    Are those live busbars attached to the DIN rail? :Applaud
  19. Bez

    Hello and please help :)

    Hello Danielle, and welcome to the forum. Only advice I can give is to put pen to paper to all your local contractors. Offer a couple of weeks free help so they can see your work ethic and hopefully one will take you on. Good luck.
  20. Bez

    Hello and please help :)

    Hello Danielle, and welcome to the forum. Only advice I can give is to put pen to paper to all your local contractors. Offer a couple of weeks free help so they can see your work ethic and hopefully one will take you on. Good luck.
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