cable sizing

cable sizing

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  1. R

    UK Level 3. Cable sizing.

    Just started Level 3 C&G and we're doing cable sizing calcs. Using a previous years exam question. We ran through a few examples of radial circuits, all well and good. Following the following proceedure: Work out total load on circuit from plan. Work out design current. Ib. Ib<In<It Find...
  2. T

    Cable sizing

    Hi all, I am trying to calculate a SWA 4 core that will be protected by a 250 amp switched fuse isolator. It is going to supply a 3 phase electric boiler that pulls 209 amps each phase at most. I'm filling in the parameters to an online cable calculator ,when asked for the voltage i've put 400...
  3. A

    Cable sizing calculation

    Happy New Year all. Quick question regarding cable sizing. I have a 25m run from DB to car charging unit. The 25m run will mean approx 8m is run in the attic, 6m is run clipped direct down and across a wall and the remaining 10-11m will be buried underground in a 2 inch duct to the car charging...
  4. B

    Some cable sizing questions! :)

    Hi All I would appreciate some help with a few questions here regarding cables sizing, I'm using the latest 18th edition, amendment 2. Q1. p.443, Table 4CQ - derating factors for groups cables - in the table it states "cables touching" but then Note 2 says "horizontal clearances between...
  5. GeoffatMM

    Three Phase Cable Sizing

    I am an enthusiastic retired engineer rebuilding a barn in France from scratch and am having problems sizing my incoming electrical cables. I have had answers from 4mm to 50mm cross section from various pages on the internet so you can understand I am a bit confused. There are two main cables...
  6. R

    New solar installation - cable sizing and no cables for battery installation...

    So, I already have solar (an older FITS installation) and it's been particularly successful so I want to extend this. I'd like to do two things at this point. 1) Add more panels in a couple of locations. 2) Add battery storage to provide some backup (power regularly drops for us) but mainly to...
  7. W

    Sanity Check and Cable Sizing: Adding RV Subpanel

    Hi folks, I have been researching the NEC and forums on the Internet in preparation for adding an RV subpanel electrical hookup. I could use a sanity check to make sure that I'm buying the right type of cable(s), and that I'm adhering to code as best I can. I have 200a service to my main...
  8. F

    Cable sizing for camping pods

    Hi all, I know it's hard to tell without seeing a job but, we're wanting to put some camping pods in at one of our sites. We're only looking at basic electrics, LED lighting and a couple of sockets for phone charging but no heaters as they won't be used all year round. We considered 16A caravan...
  9. S

    Size of imperial cable

    Afternoon all This is based on a previous thread I’ve worked on, carried out an assessment on site , found a imperial aluminium sheathed copper single supply cables measuring at 10mm diameter on the strands themselves , what size of cable does this make it? And what is the copper equivalent...
  10. S

    What size is this sheathed copper imperial cable?

    Hi guys , trying to determine the size of this imperial cable, 17mm diameter , what could the circumference be if it were double insulated? And what would be the equivalent cable now to use?
  11. S

    Cable size Aluminium cable

    Hello all, recently been asked to look some incoming power supplies for some future works , and I’m trying to determine the size of these incoming aluminium cables as it’s not something I work / see on a regular basis. Would anyone be able to give me some inside to what they believe the...
  12. G

    Cable sizing

    Hi Can somebody help me with this please Looking at the table in OSG. It states if I'm reading it right. That the ratings apply to insulation with thermal conductivity greater than (^)0.04 Wm-1K-1 So if 0.039 W/M2K = thermafloc loose 0.044 W/M2K= superglass 0.035 W/M2K= Rock...
  13. A

    Cable sizing for 50kW windmill ?

    Hello, I'm not an electrician. I'm looking for advice on the capacity of an existing SWA cable I have on a farm. It's a three phase cable (red,yellow,blue) and black neutral which connects an old 18kW wind turbine back to the farm electrical substation. I think each cable core is 10mm2 but it...
  14. M

    Cable Sizing for Oven...?? Please Help..!!

    Morning.... I was wondering if you guys could help me with this..?! I’m currently having my kitchen updated, including all new appliances... The oven, according to the manufacturers documentation has a rating of 4.2kw, which is 2.2kw or the oven and 2.2kw for the grill... The paperwork states...
  15. R

    supply cable sizing

    Hi ,I have a wood cabin outside 70mtrs from house incoming supply, I was thinking of using a 35mm 2core pvc/swa, as I think a TT system would be appropriate for the cabin, owing to the distance away from house load would be allowing for diversity would be 51amps, seems a lot but it will be a...
  16. C

    Cable Sizing 2.2kw motor

    Need a bit of advice about a motor rewire i need to do. There is a 2.2kw motor which is supplied from an MCC with about a 30m ish run using a 4mm 4 core SWA. This then goes to an atex junction box located half a meter from the motor. Then the cable goes from this box to the motor itself. For...
  17. MFS Electrical

    Cable sizing full process

    when I was an apprentice, one of our lecturers had us copy out from start to finish all of the equations for cable sizing and de-rating on the very back page of our regs book . And where to find the various factors I know that the equations are obviously in the regs but just wondering if anyone...
  18. L

    Fire barriers when cable sizing

    Hi I am hearing different things, some people have said no and some yes. Do rubber and foam fire stops through walls count as thermal insulation when cable sizing? Thanks
  19. L

    Control panel feeder cable sizing

    Hi, We have a control panel that has a vsd, plc and motor anti condensation heater. For a preliminary cable calculation for the control panel feeder cable and its associated protection, would we just total up the individual loads to arrive at an approximation and use this to size the feeder...
  20. MODECSOFT

    ElectricalOM 18th edition changes coming soon...!

    The new 18th Edition has arrived and the Modecsoft team has started implementing the new changes proposed. Our ElectricalOM Design Software will continue to support 17th Edition so the user can open projects carried out before the 18th edition. A 18th edition - beta testing version will be...

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