calcs

  1. S

    Design calcs, design criteria, or working drawings

    Hi all I'm in the process of joining elecsa part p and on my assessment day along with many other bits of paperwork they are asking to see a copy of the design calcs, the design criteria or drawings relevant to the work. When they say design calcs how much detail to you have to go into? Ie do...
    • schoe
    • Thread
    • asking aus calcs calculating design drawings electrical work working
    • Replies: 1
    • Forum: Australia
  2. G

    Tell me some calcs please

    Hi ashamed to say since ive left college ive forgotten a lot of the calcs as i work directly under engineers in a contracting firm so have never had the need to use them really bar cable calcs which is relatively basic in most cases, can you clever engineer types possibly list a few of the...
    • Guest112
    • Thread
    • aus calcs please
    • Replies: 12
    • Forum: Australia
  3. P

    4kwp system and roof wind up lift calcs

    Ok Senior members explain to me in simple terms please :) whats the point of fitting a 4kwp system if your inverta is set to G83 and will only push out 16 amps ie the 3680 max your allowed? if all invertas are set to G38 then can they push out more? also whats best way to get wind calcs sorted...
  4. IQ Electrical

    Formula help for students/trainees

    Here's a little 'Formula Wheel' with some of the more common Power/Voltage/Resistance/Current formulas. Might be handy to keep in the back pocket for anyone learning or forgetting!
  5. S

    Structural Calcs

    Does Anyone know the correct structural roofing calcs that we should all be doing?
  6. dansk

    Mcs renewal

    Just had a four hour mcs audit for my renewal, all went well, except for a couple of non conforms, and a strong word of advice, anyone not doing wind cals and structural calcs are going to be in trouble, and they can make you go over all your installs and carry out calculations. I was ok on...
  7. S

    cable calcs for cooker

    hi, I'm trying to work out which cable size to use for a cooker but I'm not sure what the ambiant temp will be for the correction factor can any one help please?
  8. J

    Design Calcs

    Hi all Does anyone have a good link to where I can find the basic process to follow (with the design calcs) and step by step instruction for designing a new circuit?
    • JamieK
    • Thread
    • aus calcs design
    • Replies: 22
    • Forum: Australia
  9. C

    Voltage drop calcs

    Hi Could someone kindly put me in the right direction for voltage drop in cables. I have the formula from OSG (mV/A/m) x lbxL divide 1000 but cant get my brain to kick in and piece everything together. There is very little in 7671 unless im looking in the wrong part. Do I require tables for the...
  10. V

    MCS & System Design

    Ok guys, On the system design side of things, what is required for the MCS assessment? Our install is to be 2.25 kWp system, with inverter mounted approx 15 meters from array,and Ac cable to CU about 5 meters away. i have done some basic cable calcs for DC cables, (to confirm Vd < 3%) and got...
  11. Energetic

    Accounting for PV in Max Demand Calcs

    Anyone know how this should be done?
  12. D

    3 Phase.. calcs and bit rusty!!

    been asked to price up and install some cable for a farm...etc.. my 3 phase calculations are a bit rusty so trying to brush up.... NEDL Have dropped a 50kva supply in on 3x35mm incomers..! first part of job is to wire a TP&N Isolator to there meter tails so they can sign job off and...
    • DurhamSparky
    • Thread
    • 3 phase aus calcs isolator phase please roman times
    • Replies: 11
    • Forum: Australia
  13. S

    2391-20 cable calcs

    Hi Anyone help with some cable calcs for my designe project, i must be missing something here. Im trying to work out and show my calculations for cable sizing of a 32A ring Length is 78 M Number of 13A double sockets is 7 Ib is 32A In is 32A RCBO It should be In / Correction factors of...
  14. N

    PFC Calcs

    Hi I am confused with my readings for Pefc as my Ze is .09 which would give me 2.55Ka but when I test PFC on my meter I get 5.62Ka? Ze, Neutral and earth leads clipped on disconnected main earth, probe Line on Supply side? Can I check I am doing this correctly;3 lead PEFC piggy back...
  15. R

    SAP Calcs, Payback estimates, Quotations and sales contracts

    Hi, Several people have been in touch looking for the spreadsheet that produces the pre-sales paperwork. Its got the new FIT rates in it but you can change them easily enough. Here is the link to the spreadsheet, because there's not much to say the thread drops off after a while despite...
  16. S

    Cable calcs

    Hi Guys, If i remember rightly, when doing cable calcs , first you work out the design current , say it was 47a, then you take it upto the nearest fuse size 50a, then look in tables to find correct cable csa. Going on the above scenario ,say it was ref method c , page 131 O.S.G gives you a csa...
    • snowplough
    • Thread
    • aus cable calcs
    • Replies: 17
    • Forum: Australia
  17. J

    Transformer Calcs

    Hiya, i have 3 questions>>>> A CE marked self contained ELV Lighting unit operating at 24v has a 50W bulb. What current will flow in the transformer primary A> About 2 Amps B> About 1 Amp C> About 0.5Amp D> About 0.2Amp A CE marked self contained ELV Lighting unit operating at 24v has a...
    • jonesy123
    • Thread
    • aus calcs transformer
    • Replies: 4
    • Forum: Australia
  18. S

    yield and efficiency calcs

    Hi all I need a book or something online to help me spec my first system which i want to use for my MCS registration job. The installation will probably be on my own house. i'm looking at the Schott poly 220 modules and i'm confused whether i should be using the electrical data at STC or...
  19. N

    Cable Calcs - can anyone check my logic

    Hi, Calculating - for the first time - SWA buried cable. The design current (Ib) is 12 amps The cable run will be 20 metres, buried in the ground. I'm looking at 2 core SWA, using the armour as earth (no grouping, ambient temp changes (other than buried) or rewireable fuse factor to...
    • Noddy67
    • Thread
    • anyone aus cable calcs check logic
    • Replies: 9
    • Forum: Australia
  20. D

    heating calcs

    loooking to calculate storage heating KW needed is there a rough formula for this KW per meter cubed or something thanks
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