calc

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  1. Rockingit

    Messed up with LED driver calc, can't think, brain to mush mode....

    Hi Troops, not so much an electrical issue as an electronics one, just realised that I've dropped a hairy one with making some crimbo led display lights (for me, for home). LED driver I got isn't up to the job, and my brain has ceased to function (mixture of cider and soldering fumes).... 10...
    • Rockingit
    • Thread
    • aus calc can't current driver electricians' talk led led driver power series voltage
    • Replies: 20
    • Forum: Australia
  2. G

    Cable Calc Template.

    Evening all. This has been in the arms for a while now and I meant to post it in the open forums ages ago but totally forgot. It's the design template I created when I did my C&G 2400 design course (C&G 2391-20 in todays money). I have tweaked it a bit to update it, regs references etc but the...
  3. E

    cable calc

    Hi guys. Was doing a cable calc and got confused with Ci and reference method 103. Are they essentially the same, but that method 103 seem to be calculated for insulation at 200mm thick, whereas Ci allows you to vary correction for different thicknesses of insulation? Also, when using It...
  4. L

    GU10 calc

    Hey there, just a quick question before i wire all these spot lights. Iv got a 1.5 T and E fed by a 10 bs60898 would that be enough to supply 20 x 50w GU10 spot lights? 50 x 20 = 1000 1000/230 = 4.34 amp is that correct? thanks again
    • luke12345
    • Thread
    • aus calc electricians' talk gu10
    • Replies: 2
    • Forum: Australia
  5. W

    Cable calc software/Risk assessment forms

    Hi i have just gone self-employed and wondered what cable calc software was out there(free or to buy)that is easy to use. Also any Risk assessment/Method statement software/templates. Any other advice gratefully received thanks.
    • wolfboy
    • Thread
    • assessment aus cable calc electricians' talk forms software
    • Replies: 4
    • Forum: Australia
  6. L

    quick calc question

    just a quick question. im installing 10 x 4 foot fluorescent fittings, each with 4 x 36w tubes. I was under the impression that each fitting would use 144watts, so all 10 would be 1440watts, which would be 6.2 amps in total. The problem is it keeps tripping a 10 amp breaker and when ive had a...
    • luke12345
    • Thread
    • aus calc electricians' talk question quick
    • Replies: 12
    • Forum: Australia
  7. L

    Max Demand calc for new supply

    HI Guys I have a 8 flats and 2 retail units due to be built soon and i am trying to work out the Maximum demand for each of the flats and the 2 shops so the supplier can ensure a large enough mains supply. The Retail units are to just have a supply to a distribution board, the shop is not too...
    • leestaf
    • Thread
    • aus calc demand electricians' talk max new supply
    • Replies: 2
    • Forum: Australia
  8. Doomed

    Cable calc help please

    Doing an inspection on two workshops at the end of the garden. Workshop one has 40A MCB feeding 6.0mm T+E to junction box on the inside of the house on back wall, then 6.0mm SWA buried to the workshop. Distance to workshop 20m. If the run was all SWA I calculate this as OK (just - max load...
  9. I

    Cable calc min CPC

    hi there can anyone just check my use of adiabatic please 4mm/1.5mm cpc circuit, type 2 30A MCB zs = 0.35 pfc = 230/0.35 = 657.14 t = 0.01 k= 115 s = sqroot (657.14x657.14x0.01)/115 = 0.5714 mm so the 1.5mm cpc will be fine. Yes ??
  10. L

    volt drop calc

    is this right mv on chosen cable from regs x length of cable run x design current of circuit divided by 1000 is it calulated amps or the breaer your going to use is that all as im trying to work out for this lighting circuit but to get the volt drop under 3% the cable needs to be 6mm ta...
    • lockhes
    • Thread
    • aus cable calc circuit electricians' talk lighting lights volt volt drop volts
    • Replies: 17
    • Forum: Australia
  11. H

    solar calc app

    anyone use any of the apps, on iphone to aid calculation?if so which one?
  12. the pict

    pfc/psc manual calc

    When calculation Zs how do I arrive at the PFC for that circuit, I know the tester works it out but whats the calculation formulae Pict
  13. R

    Adiabatic equation calc

    can anyone help I want to calculate a main earthing conductor for a three phase supply using the old adiabatic equation. I'm struggling to work out what value of I to use. If you use 230V/0.35 (for a TN-C-S) then you get 657 amps.... if it turns out that Ze is lower, the fault current is going...
    • rick.oshea
    • Thread
    • adiabatic aus calc electricians' talk equation
    • Replies: 9
    • Forum: Australia
  14. D

    motor calc

    i'm wiring a final circuit for a 400v 7.5kw motor,15amp FLA starting is DOL i've calculated for the 30m final circuit using 4*4 swa a VD of 4v or 1% i haven't calculated VD on the distribution circuit would i be safe with 4*4 or should i calculate total installation VD to be sure also is...
  15. D

    Schuco rail length calc

    Chaps, I notice the Schuco Rail length calculation is "22 mm + [number of modules x (module width + 21 mm)]". I'm guessing this leaves zero gap at the end of the rail after the end-clamps. Are Schuco expecting their end-clamps to be flush with the end of the rail then?
  16. B

    payback calc excel sheet

    hi all, presume some of use the excel payback calc from eco skies, it is out of date does anyone know the workbook password so the fit payment can be updated to the new rate or has anyone got an improved payback excel template? cheers all
  17. 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...
    • srands
    • Thread
    • amp aus calc electricians' talk ring wire
    • Replies: 41
    • Forum: Australia
  18. 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...
  19. 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...
  20. 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.
    • martysparky
    • Thread
    • aus calc electricians' talk please rcd sorry touch voltage
    • Replies: 9
    • Forum: Australia
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