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calc

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  1. J

    great little cable calc software program

    Just updated my 'Cable Mate' software program which is brilliant and updates are free. For you guys doing the big one (The Design and Verification part of 2391) this is a secret weapon. I used the earlier version a few years ago for the big project and it helped hugely. Check it out. Its...
  2. S

    RING AMP XL calc for SKT WIRE diameter

    Hi folks,the following are equations/xl formulas (SPREADSHEET :D) of what SKT WIRE would you use for RING MAIN example with a known MAX in AMPS (Given recognised KIRCHOFF equation with 3 SKT EXAMPLE1 below, D is the SUPPLY/SOURCE/START of CIRCUIT/FUSEBOX MCB). As per the example given in the...
  3. V

    testing calc question

    a 10amp type c has a max measured zs of 1.85,i have a circuit with a measured zs of 2.03 the circuit is 2.5mm (not sure type) and it provides roof lighting also r1+r2 was 2.77ohms. is there any way i can make the zs result acceptable using the design zs from the regs or does this circuit just...
  4. U

    Cable calc for meter tails?!!

    ok, need a lil help. Cu approx 40 metres from meter. in a block of flats. total demand is 132A therefore after diversity 132A x 0.4 = 52.8 A (approx) cable run in tray in cable duct in free air. 100A cutout fuse in place at mo. currently in 25mm armoured! is this enough? lil...
  5. M

    RCD mA calc

    Could someone please confirm how to calc the size of an RCD PLEASE? I was asked this and am not sure, looked in the regs T 3A and think its V over RA but am not sure of this. I'm only domestic but I need to get this straight in my nut. Cheers guys.
  6. G

    Cable calc advice needed...

    Hi there, Have just picked up a job to price and i'm struggling to work out the best solution to the problem. Any help would be greatly appreciated. Scenario.... Large 5 bed house being split into 5 rooms for separate rental. Landlord has decided to install 5 power showers to each of the...
  7. C

    cable calc

    hi guys, have any of you got the software "cable calc"? is it good? and most importantly is it worth the ££££?? cheers!
  8. M

    Submain calc

    Right, I'll try to keep this simple. I have a job coming up that involves installing a couple of storage heaters. The 2 rooms are on the 2nd floor of an old building and the DB is in the basement. They also require a ring main to give power to the 2 rooms. There is no way of running cables...
  9. S

    Current carrying capacity and volt drop calc

    Hey all. Hope that this post is relevant to this section. Got a call this morning from my colleague who is on a large industrial job at the mo. He has asked me to calculate and come up with a suitable cable size that is forming part of a distribution circuit. I also need a suitable fuse size...
  10. sythai

    Cable Calc help please...

    Evening all... Been to look at job today: meter is moving so need to re-do tails with switch fuse at incomer, all agreed ok with supplier. Run is approx 13m - main switch in CU rated at 100A - run through first floor joists - no insulation. Just wonder what the volt drop would be over that...
  11. D

    3-phase calc

    quick question: a 3-phase lift rated at 2.2kw 6.4 amp doesn't seem to add up for me?
  12. E

    First cable calc that is non-theoretical!

    Hi, just wondering if anyone would be kind enough to take a look over my cable calc as I haven't done one really since I finished college as it's all been house bashing. The customer wants a supply feed up to the top of his garden (cable run will be 70m) The cable is to be run along the top...
  13. Mark.W

    Cable Calc

    Evening Gents I don't have my regs book with me at the moment and was wondering if one of you kind people could help me out with this cable calc? I am busy rewiring a house that is currently on a TT system. The owners want the meter moved to the other side of the house, but Southern were out...
  14. Eggster71

    Handy free cable calc.

    Register on the Draka Cable website Draka - The world's most trusted cable brand | Home Page and there's a free to use cable calc programe.
  15. S

    Cable Calc.

    Would one of you helpful chaps do a cable calc for me, as i dont have my books to hand at the moment as i am away. 40A over 100 meters. Most of it SWA. Much obliged :)
  16. B

    stuck on a Cable Calc

    Afternoon chaps. I'm new here, hope i've posted in the right place. My tutor has asked a cable calculation question i just can't get my head round. senario is this, there are already 10 lighting points in a house when a customer asks for 2 x twin wall lights to be added. i have to show with...
  17. I

    Calc advise

    Ok, Here is one for all you Big Guns of calcs... I am doing 2391-10 at the moment and l finished my apprentership 20+ years ago, so as you can gather I am a bit rusty on the old class room thing... All I want is for someone to explain to me in a very simple way how to do this calc and for...
  18. S

    Cooker calc

    Question from a 2400 paper Cooker @ 12000w. TN-C-S @ Ze= 0.25ohms. Socket on cooker switch. BS1361 fuse. 25 meter run. PVC t&e clipped direct with 4 other cables. Passes through 100mm length of surrounded insulation. Leaves group and in HG pvc conduit in ambient of 45 degrees. Ib = 52amps...

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