calculations | Page 4

calculations

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  1. G

    PVOutput.org - What data did you enter for FiT calculations?

    When using PVOutput.org, what data did you enter into the tariff section so your FiT payments could be calculated? No matter what I enter it always shows 0.00 though many other seem to have calculated payments assigned to each month etc
  2. D

    3-phase power calculations

    Hi, I am a trainee electrician and have some questions concerning a 3-phase installation. I have been asked to calculate the maximum load of a supply at a factory and have the following information. I realise the best option is to use a clamp meter and measure the voltage and current load across...
  3. A

    Android app EasyEngineer

    https://play.google.com/store/apps/details?id=easyn1.easy.EasyEngineer&feature=search_result#?t=W251bGwsMSwxLDEsImVhc3luMS5lYXN5LkVhc3lFbmdpbmVlciJd Only for screens with 4'' and less. With EasyEngineer you have more than 180 calculations available, divided in 6 areas. It's a huge...
  4. B

    Working out resistor calculations...

    Late at night....tearing my hair out....need help with working out resistor calcs. 230V supply....R1=70...R2=90 What is the value of a resistor which when connected in parallel with 70 ohm resistor will cause a total current of 2.4 amps to flow in the circuit? any guidence to push me in the...
  5. ringer

    Thermal insulation in cable calculations

    When doing cable calcs, particularly the Ci for thermal insulation when calculating It, does the amount of thermal insulation refer to the length of cable that is covered by (any thickness of) insulation, or does it refer to the thickness of the insulation that is applied over (any part of the...
  6. T

    PV Payback Calculations

    I have been looking at various websites of companies selling PV and have came across some examples of what I would consider to be misleading information. Or maybe I am just naive in thinking that we should try and present the solar case honestly. I came across a Solar PV company who claimed a...
  7. B

    voltage drop calculations

    I have been asked to connect up a mobile home on a large transportation site. The run of cable is approximately 250meters. In the regs book for 25mm armoured cable there are three values x y and z which one should I use
  8. Rockingit

    Loading calculations and diversity - come and have a go!!

    Hello Troops, This follows a thread from last week about SNE supplies, and many thanks to Tony for already having looked at this off forum just to check I'm not going mad!! We get on a weekly basis someone posting about loading and worries, and we politely tell them about diversity and yes...
  9. N

    Books you swear by... Whats in your collection?

    Can anyone recommend some good electrical books? I feel I need to update my collection. The ones I have are not only the regs and the O.S.G but also: Advanced Electrical Installation Work. Electrical Installation Work - Brian Scadden. Electrical Installations Level 2 and 3 - Heinemann...
  10. B

    calculations help

    hi all could some one plz help me iam trying to do a pir without any power so i need sum help to check these calcs are right 1. zs on ccts zs=ze+r1+r2 2. ze on main board 0.35 ohms (TN-C-S) 3. PEFC if=Uo/zs 4. PSCC ???? 5. what r1+r2 value, (ie which one) do i use to calculate zs for the main...
  11. J

    Calculations book

    What I'm looking for is a guide to working out calculations, prior to starting a course just to get some background knowledge. The only ones I can seem to find appear to be full of errors according to user reviews. Any ideas? Thanks.
  12. SolarCity

    SAP calculations and general misselling

    I've just had an interesting meeting with a potential customer. He has had a few different quotes and he is more or less sure he wants to go with us. He was confused about a few things, however, and it's hardly surprising. He showed me some of the claims that have been made by other PV firms...
  13. P

    Wind loading calculations

    Hi, Has anybody performed wind load calculations on PV panels? We have to quote for a job located very near the sea in an exposed location. Concerned about environment. Paul
  14. O

    motor calculations

    Please can someone check my calculations for motor design and let me know if i have overlooked anything much appreciated C/B 1 3p + N Schnider electric C120h / d80 / 400v / 6000 Max Zs 0.14 Ω measured Zs 0.05 approx 60 mtrs Swa 5 core Ib = 37000 / 0.87x 0.92...
  15. L

    Cable Calculations

    Remember seeing on here back along a range of cable calcs on one printable sheet. Can anyone put their fingers on it? Cheers
  16. O

    r1 + r2 calculations

    ANY HELP ON THIS LADS APPRECIATED!! ok haveing tested a 230v 50hz circuit 100mtrs protected by (mcb 16a type c max ZS 1.44) (20a contactor) feeding (4 x 400w sodium floods)... the readings were as follows ..(cpc r1+r2 = 1.47ohms) Ir=>1999 (Ze = 0.01ohms) pfc 6.00 ka/ are my calculations...
  17. L

    Wind load calculations

    Hi, Does anyone use any software for wind load calculations. If so how do you use the information to ensure the additional wind load is ok for the structure. I have seen other people use structural engineers but does anyone do it themselves and how. It is ok to say a building (domestic) of...
  18. D

    Supply calculations for 3 phase motor.

    Just need some advice for calculating the size of supply for a 3 phase dust extraction unit. In the past i've worked with 3 phase so understand how to do it but this has always been whilst working for other firms who give you the materials and tell you to get on with it. Now that i'm self...
  19. michaelw6

    17th edition wire calculations... new and old installs.

    a couple of questions really. 1st. On a periodic which has had new insulation installed the 17th edition calc on my pc up rates all cables so now there not up to regs, do you recommend a rewire on every test??? 2nd. I am currently fighting with a decision on a new build that the cable calc said...
  20. M

    R1+R2 Calculations from ZS

    I am not so clued up on testing, but willing to learn where ever and however I can. Recently I have doing some maintenance and remedial work. I am working with this guy who has been 'doing this kind of stuff for years'. We replaced a fan and he insisted that not only does it need to be recorded...

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