cable calculations | Page 2

cable calculations

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  1. M

    30kw boiler cable calculations

    Hi guys just a quick check in my calculations for a quote I'm doing 15meters clipped direct 30,000w divided by 400v = 75a per phase im using sy cable and think 16mm 5 core is best What you guys think
  2. M

    Cable calculations ?

    Just seeing if im doing this correctly so im using a post from the main forum that someone has asked for help with. cable calc for 9kw electric boiler. This is my first post and not sure if in right place! My company have asked me to quote for a supply to be run for a 9kw electric boiler, the...
  3. K

    Cable calculations help

    Hi I'm at an installation which is a servery counter. It has a 8way 3 phase distribution board protected by a 63A 30mA R.C.D the circuits are wired in 1.5mm 3core flex and are protected by 16A 60898 MCB's (all radials). They supply socket outlets which allow appliances to be plugged in. My my...
  4. H

    Cable Calculations

    Hi All, I'm Wondering if anyone would take the time to explain how to calculate cables sizes & Which breakers to use? I know you have to look through Regs. But if people could explain how and which pages in the regs? I would be very Grateful! Look Forward to your responses :) Luke
  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. 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
  7. W

    cable calculations

    hi, have a cable calculation question. what size off cable do i need to run to supply a mushroom house. its a 70 meter run of swa cable buried in the ground, the load is 12 amps lighting and sockets and a cooler taking 32 amps all this is single phase loads. there is also a 3 phase machine...
  8. A

    Cable Calculations

    Hi everyone, Ive got to install a sub main for a large bugalow. The supply is in the garage and the 2 nd mains board is approx 40 meters away. I was going to use 16mm t + e, 1 meter in trunking then the rest will be in the loft clipped high up away from the insualtion. ( so no RCD) It will be...
  9. S

    Volt drop and cable calculations

    Hi guys, does anybody have a quick or easier way of working lout volt drop or cable calculations?? Basically, a way of working out if cable size and length is suitable for design? I am always looking in OSG and BS7671, so wondered if any easier way. Thanks guys and speak soon. Sav :)
  10. S

    Volt drop and cable calculations

    Hi, does anybody have a quick or easier way to work out volt drop and cable selection calclations ?? I always refer to the BS7671 and OSG, but wondered if anyone had an easier way to work these out. Cheers guys and speak soon Sav :)
  11. K

    3 ph cable calculations

    Hi all, Can anyone help me as to how to calculate the maximum demand on a 3 ph supply for cable sizing? Can i just quickly estimate the demand by the breakers and multiply by a g factor i got from the IET design guide for sparks. eg 250 amps counting the breakers x 0.7 factor for mixed...

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