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  1. L

    Voltage drop and cable size calculations.

    Hi, would like ta post a question about voltage drop in a cable. If I have a 230v single phase load of 500w with a 50 meter cable run reference method C . What would be the voltage drop in a 1.5mm2 ? From my calculations excluding pf I checked from the table the the voltage drop in mV/A/m of a...
  2. G

    Breaker size for Double Oven.

    Your comments appreciated please: New Neff Double Oven - 28A total load. Oven tail 4mm 3c butyl HO7 35A rated. Feed 6mm T&E, to a 40A oven switch with 13A socket. Circuit breaker - 40A or 32A ? thanks, John.
  3. bigspark17

    Submain swa size check

    Just after a bit of advice from thoose of you that deal with this regularly & want to make sure i get it right. Swa submain to phone network mast 63Amp single phase supply Pme supply assumed ze of 0.35 245M run Ive been trying to calculate which size swa & cpc or 3c swa to go for, would like...
  4. D

    25kv generator cable size ???

    can anybody tell me what size sy cable I need for a 25kv 3 phase temp generator please to power a 3 phase machine lathe
  5. S

    CPC size of SWA Armouring

    Evening, Just joined upto this forum after a search online for some info, hopefully someone can help me? I have taken over a job from another contractor who has run in a 50mm 4 core swa from a substation to a TP&N DB roughly 100m away. My concern is that it appears they have not run a separate...
  6. J

    Cable size and protection - calculation

    If possible could anyone have a quick look over these steps I've made myself for cable sizing and the protection needed. Please let me know if I've missed out anything. I also couldn't find a definitive answer for maximum permitted voltage drop percentage for 3 phase. I think it was 5% and 8%...
  7. J

    Calculating cable size - start to finish

    Hello everyone, I would like it if anyone would be able to help me in listing the steps For choosing cable size. Starting from protective device from a boards 'Zs' value, all the way to the cable size. Thanks in advance
  8. S

    Maximum breaker size for DB (solar PV)

    Hi, Can anyone point me in the direction of the regulation / code for the max solar MCB size when connecting into a spare way of a local distribution board ? Eg. Is it possible to connect a 100A breaker into a 100A board ?
  9. Zdb

    Cooker circuit (cable size?)

    Hi guys, I've been given the task of installing a 32A commando socket w/ isolator, which will have a 27A oven plugged into it. It will be on a C32 30mA RCBO. The cable from the oven is 4mm which will have the 32a commando plug fitted to it. My question is, should I wire the 32A commando socket...
  10. A

    Theoretically... cables must be fused down when a lower size cable is connected to a larger sized ca

    Now I completely understand why cables must be fused down when a lower size cable is connected to a larger sized cable. To ensure the cable does not burn out from current that it cannot take. Yes i know this Now current doesnt go anywhere it isnt in demand for so if a spur off of say a 6mm for...
  11. D

    CPC Size & Max Permitted Zs

    Looking through our periodic certificate that was completed by a 3rd party, I've got a few queries that hopefully someone on here can clarify. We've got a Schneider Prisma switchboard (S3/MSP 3.1) fed from 11kV/400V Transformer. - What is meant by MW for cpc size of 2/TP and 13/TP? - Is there...
  12. MODECSOFT

    Video - Cable size calculation example

    In this video tutorial we demonstrate the steps needed to complete a comprehensive and accurate single cable size calculation using ElectricalOM Software in accordance with BS7671 IET wiring regulations.
    • MODECSOFT
    • Thread
    • cable cable size cable sizing calculation electrical videos electricalom example size software video
    • Replies: 2
    • Forum: UK Electrical Forum

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