sizing

  1. H

    VCB Panel sizing

    How to calculate sizing of vacuum circuit breaker ?
  2. S

    Cable sizing

    I am about to embark on a project to convert the top floor of my garage into a small granny annexe. There are lots of considerations to make, but one of them is the electric supply. The garage is about four meters away from the house. At present, it is served by a 6mm twin and earth single...
  3. P

    Cable and mcb sizing

    What is the proper way to size this up. 7.5 kw 3 phase + n motor in a dry cleaning machine. Is it 7500/400x1.732= 10.82 amps per phase = 2.5 mm2 in trunking method 3, 21amps current carrying capacity Do i have to oversize the cable for inrush current? Or is 2.5 ok? Thanks.
  4. M

    Cable Sizing

    Hi There, Can anyone assist with a cable sizing for 250 Kw (across 3phase) and neutral from a wind turbine to farmyard to supply chicken houses etc. Cabe length 2185 Mts buried direct SWA Cheers
    • Martin Gallogle
    • Thread
    • cable cable sizing sizing
    • Replies: 12
    • Forum: UK Electrical Forum
  5. D

    Cable sizing 50kw solar system

    Hi All, Can someone please help me with calculating the cable size of a 50kw 3-phase Ac supply over 35m, on cable tray using swa? Just need to know the cable calculation as im getting confused. Regards
  6. N

    Solar PV volt drop and cable sizing.

    Morning gents, just a quick one. I've posted this already on the Solar PV forum but thought I'd add it here too as VD and cable calcs are always a good topic of discussion. So I have a Solar PV system to install this weekend, its a 10KW single phase system on a farm. I'm going to be running a...
  7. N

    Cable sizing solar PV

    Morning gents, just a quick one. I've posted this already on the Solar PV forum but thought I'd add it here too as VD and cable calcs are always a good topic of discussion. So I have a Solar PV system to install this weekend, its a 10KW single phase system on a farm. I'm going to be running a...
  8. L

    Cable sizing

    Good evening, Trying to get my head around cable sizing so need some help, so I've based my scenario on a workshop at my place of work, there is a 6 way board going up but obviously at the minute it is empty so how would you be able to come up with Ib?
  9. D

    A little assistance required regarding earth sizing.

    Hi guys, I have been doing a bit of testing today and need a liitle input if possible. The installation is TN-S at source. There is a 50A switchfuse which feeds two distribution boards in a B & B outbuilding. The supply comes into the first D.B (in one of the B & B rooms) into the top of an...
  10. F

    400amp 3 phase 4 wire cable sizing help.

    Hi guys if you could help me out with this would be much appreciated, its for a shop within a shopping centre and the client ( Decathlon! ) require a huge supply which i have contested but they seem to think they need this size feed. From a ryefield board to a 400amp switch fuse within the...
  11. A

    sizing containment for T&E

    Does anyone have experience sizing cable tray/ basket and trunking which is used for twin and earth cabling? The on site guide only provides guidance and factors where single core PVC cables are used. I am looking for help where twin and earth is used.
  12. T

    Some theory about cable sizing, electrical circuits, RCD's, switchgears etc.

    Hi guys, As I post in the head of the topic I am loking for some theory about the above things.I was looked here in this chapter but I can not find nothing.So if somebody of you have some materials about that I will be very thankful to send it to me.Or paste some links here.I prefer somthing for...
  13. S

    Cable Sizing

    Hello Gents, I am looking to carry out an installation on for battery load banks system - the system supply will be 220 VDC at 125 amps, I have 25mm single core cables available to use, the run is no more than 10 meters and the cable is contained in trunking, for this circuit...
  14. M

    3 phase supply to motor cable sizing

    I need to run in a supply for a 3.52kw 3 phase motor 70m from DB i worked out that 1.5 swa in free air would just about be sufficient so thought i would use 2.5mm 4 core length of Run 70m P= 3.52kw v=400 I = P/V = 8.8A Table 4D4A USING INSTALLATION METHOD E 1.5MM can take 19A Table 4D4B...
    • Maestro
    • Thread
    • 3 phase cable cable sizing current motor phase sizing starting supply supply to
    • Replies: 13
    • Forum: UK Electrical Forum
  15. N

    Sizing of CPC and bonding conductor

    Hi Guys I have been asked to quote to install a MET for a TN-C-S system and I could do with some advice please I can't get into determine the size of the conductors as I cant switch the power off to open up the main panel What I did was measure the circumference of the SWA it was 214mmm I...
  16. S

    3-phase sub-main sizing

    hi chaps, I've got a 3-phase supply to get in and am not overly experienced in 3-phase cable calcs, basically the run is 60m, it will be buried, and it needs to run one 3 phase 16A boiler, a couple of single phase socket outlets and a couple of lights. hope somebody can shed some light
  17. H

    Storage Heater Sizing

    Hi I will soon be fitting a 0.9kw storage heater. it has no user controls so I will be using a d/p fused timer switch (recommended in installation instructions) I will be using 1.5mm heat resistant flex from the dp switch to the heater, but am just wondering if I should use 2.5mm to power the...
    • harold_dcfc
    • Thread
    • heater sizing storage storage heater
    • Replies: 19
    • Forum: UK Electrical Forum
  18. B

    Sizing Contactor to control Photovoltaic DC

    I know this is a U.K. site but I'm hoping someone will be able to answer a qn. Recently I saw a that a company was producing a remote disconnect safety system for PV panels mounted on a roof.This is to disconnect the arrays automatically if the mains is disconnected or manually after a storm or...
  19. R

    down sizing long lighting circuit

    I'm testing a car park lighting circuit at 200m long. 4mm singles to first point at about 100m and then reduces down to 2.5mm. Trunking used as additional CPC to reduce Zs values. How would you record that on a test sheet? And is there a regulation about downsizing?
    • robhawk
    • Thread
    • cable circuit first lighting lighting circuit long record sheet sizing
    • Replies: 4
    • Forum: UK Electrical Forum
  20. B

    sizing SWA armour as cpc using adiabatic......

    I'm doing a mod for a 3 phase circuit already installed. The only trouble is I can't work out why the existing cables are as they are so i am doubting my sums. Existing final circuit. 3 pole memshield 2, D32 rated feeding 10mm2 4 core swa with a seperate 16mm2 G/Y as cpc. Measurements at the DB...
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