sizing

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  1. P

    DC isolator sizing

    I seem to be getting myself a little confused. My boss keeps quoting 63A DC isolators on commercial jobs? I thought that when the panels are in series the current stays the same but the voltage increases (is added together) to get Voc and Isc? So I've been quoting 20Amp 800V isolators? How do I...
  2. N

    50 kW PV System a.c cable sizing info

    Hi there, I am installing a 50 kW PV system on a barn roof. The barn is supplied by a 4 core 16mm SWA which is partly run underground and is 100 meters in length. The three phase DB in the barn only supplies the lighting in the barn, all the old circuits have been removed becuase they...
  3. C

    Swa sizing

    Hi can anyone help Im running about 35m of swa cable from the house to the garage as the ac back to the inverter the array is a 4kw whats the quickest way of finding out what cable size i need? many thanks
  4. J

    capacitor sizing.

    hi all, was not too sure where to post this thread so ill put it here for the now. :smilewinkgrin: just a quick one, at work i have a machine that has shuttles running down it, its an automated picking machine. the shuttles run along 48v dc buzz bars, 48v, 0v, and safety circuit. all shuttles...
  5. A

    Another cable sizing question

    i have been asked to install a garage unit in a outbuilding they wanted a couple of sockets and lights and i think i allowed about 20A total output for design current. what size cable do you think bearing in mind its a 90 meter run in a trench from house to out building.i allowed 16mm does this...
    • ABerry82
    • Thread
    • another cable cable sizing question sizing
    • Replies: 15
    • Forum: UK Electrical Forum
  6. R

    Cable sizing

    Need a cable to run approx 100m from incoming supply to a new build house,cable will be buried under ground what is the mimimum size cable that could be used to make it comply with the regs? Copper/aluminium? Thanks
  7. G

    Cooker cable sizing

    I've got a 17.1kW cooker to install. The cable run is 20m, can someone please confirm what cable size should be used. Thanks
  8. S

    3 Phase cable sizing help?? Proceedure?

    i'm after a little help with cable sizing. I have tried reading my IEE design guide, and still struggling to get to grips with the correct proceedure to follow for sizing cables. I have always struggled a little with this, but thus far my knowledge goes (albeit shaky)... It>_ In/(Ca x Cg x Ci x...
    • Smudge
    • Thread
    • 3 phase cable cable sizing cables factor phase power sizing
    • Replies: 8
    • Forum: Australia
  9. S

    Dc cable sizing

    I have in the past mounted the inverter in the loft space but a customer wants it located in the garage. It's approxa 20m run to the array. Would you be inclined to put a dc isolator in the loft space for local isolation? The cable run for 1 string would be 4mm would this be correct? If anyone...
  10. S

    Cable Sizing

    Hi everyone, I've just had my electrician run the AC Cable from the inverter to the consumer unit but i think he has used the wrong cable size. Background Information- Its a 4 kW (Sharp NDR-250A5) system split over two strings running to a SMA SB 3800 inverter on a farm outbuilding. From here...
  11. T

    sizing 3 phase supply to/from 50KW solar array

    Hi all, I have been asked to run a 3 phase supply from a nearby service head to a new DB servicing a solar array to be fitted on a riding school roof. This is to take the electricity generated back to the grid. A proper MCS contractor is doing the array. The problem I have is that the array is...
  12. Mark42

    Sizing DC cables, PV Array to Inverter. Confused. Help please!

    My brain is overheating trying to make sense of PV panel parameters and calculate the CSA of a DC feed cable to the inverter. For my 16 HL Solar 250W panels, the spec is: Imp 4.94A Vmp 50.6V Isc 5.35A Voc 60.5V Two strings of eight panels in parallel. Therefore: Total current at max power =...
  13. B

    Newbie needs help with cable sizing quote.

    Hi Guys, Im newly accredited and have got a pretty strange install to quote already. The panels and inverters are fine but it's the cable size i’m getting different results with and none of them definite. The array will be in a field on a frame, the house has a split supply (2 phase??) And the...
  14. T

    sizing inverter

    Hi all Got a 10 k.w installation with 40 lattitude 240 watt prismatic panels on a south facing roof, 35 degree pitch. Can anyone reccomend an inverter to suit this? Thanks in advance
  15. L

    hwo to sizing gen set for my motor

    I'm planning to install one set hydro generator to supply to my 3p, 7.5Hp 415 volt motor. I've a replica stream at my pond which is i found suitable to install the paddle wheel at the stream. The generator will be powered by paddle wheel connected via belting. I got two motor with same spec. One...
    • layzbass
    • Thread
    • motor sizing
    • Replies: 2
    • Forum: Australia
  16. J

    sizing meter tails and switch fuse discrimination

    DNO has upgraded service fuse from 30a to 60a, they do not want to go any higher due to the main feed cable. CU is 4-5m away, connected via switchfuse. Should 16mm or 2mm tails be used, OSG recommend 25mm but seems to assume a 100a supply. With a 60a head, what size switchfuse should be used...
  17. J

    Sizing bonding conductors

    Hi guys, i have a question what size of bonding conductor is required for A shed that has a 63 amp 3 phase( 25mm2 swa) supply going to it. It is supplied from the main building that has a 400 amp TN-S 400mm supply . hust want to see if you have the same answer
  18. C

    TT Earth cable sizing

    Hi al, Just need a bit of a refresh regarding the sizing of the earth cable for a domestic installation with an earth spike. I believe 10mm for the gas & water bonding, but seem to recall that the main earth cable can also be 10mm?
    • chloebear
    • Thread
    • cable cable sizing earth sizing tt earth
    • Replies: 11
    • Forum: Australia
  19. O

    cpc sizing

    Table 54.7 states that cables 16mm or smaller shall have the same size line and cpc. So why does T&E have a reduced size cpc?
  20. N

    Cable sizing

    Can anyone help me out with sizing two cable please? I dont have access to any of my reg's. Cable is in a duct, 210 meters long, 3phase machines @ 225KW and a 3phase machine @ 500KW. Cheers
    • nero
    • Thread
    • cable cable sizing sizing
    • Replies: 18
    • Forum: Australia

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