Quick Cable Calc Please.

[monkey5]

if anyones got a cable calc software is there any chance of typing a few thing in for me. ive got cable mate but forgot to reinstall it on computer after it crashed and had to be factory restored and BGB at home.

your help is much apprieciated.

its SWA 3 Core PVC

40m

design calc 75A

protected by 80A Fuse (in switched fuse)

no grouping

no insulation

not buried (will be under floating floor)

its for a sub main so not lighting.

think thats everything.

cheers in advance

wayne

 

[Sharpend]

This help?

http://www.tlc-direct.co.uk/Technical/Charts/VoltageDrop.html

 

[monkey5]

This help?

http://www.tlc-direct.co.uk/Technical/Charts/VoltageDrop.html

TLC don't go up to size of cable I need, I e tried a couple of other online ones but they vary from 25 to 35mm.Thanks anyway

 

[wozz]

I get the feeling you don't think the 3% volt drop will apply. What's the submain supplying? I've always read it as from origin to furthest point which will include your submain. 

 

[monkey5]

Thinking 5%, It's feeding sockets.

Got it sorted now thanks anyway

 

[SLIPSHOD & SLAPDASH]

So what  did you decide ? Post it here so we can all have a handbag fight & tell everyone else is wrong   ]

 

[monkey5]

So what  did you decide ? Post it here so we can all have a handbag fight & tell everyone else is wrong   ]

:slap  10mm2 T&E!

went for 35mm2 SWA

 

[SLIPSHOD & SLAPDASH]

F*** trying to connect that into a socket  :B- . Is it commercial ?  Guinness

 

[ParkySparky]

It's to feed a sub panel which I presume only has sockets from it!

 

[dannyr]

You can use mastercross software. It's free.

 

[Evans Electric]

:slap  10mm2 T&E!

went for 35mm2 SWA

What are you saying there Monkey ?   You calc'd it to 10mm2    but  installed  35mm  . ?

 

[Blue Duck]

bit of step up?

 

[binky]

Volt drop not an issue :innocent

 

[Jono Pashley]

From the Donny Cables Website. 35mm doesnt seem too far fetched if he has lighting final circuits from the sub board too. Results Phase Single Phase Power 17.25kW / 75A Length 40m Core Size 25mm² Voltage Drop 5.7volts

 

[NozSpark]

From the Donny Cables Website. 35mm doesnt seem too far fetched if he has lighting final circuits from the sub board too. Results Phase Single Phase Power 17.25kW / 75A Length 40m Core Size 25mm² Voltage Drop

5.7volts

Personally I wouldn't rely on their calculations... I sized a cable on their calculator,, 3ph 100A per pH buried and clipped direct,, IIRC theirs came out at 5 core 16mm... I checked by the book and it came out at 35mm

 

[Jono Pashley]

Id calculate it but im lazy and mr Kopparbergs Mixed Fruits are making my vision funny!