Shed Electrics

[stefan4782]

I have got a outhouse (SHED) its got 5 double sockets 3 12v spot lighs and a outside light plus a 2kw heater (Will replace with 500w heater) there was 2.5mm supplying the shed now I have taken it out I was going to use Newlec NL6943XLH Cable, Black, 25m, Copper 4mm², Three Core with a Crabtree RCBO Type C, 40A, Single Module.

Would this be okay to use or would the 2.5mm be okay?

 

[Engineer54]

That's standard SWA cable nothing special... lol!! Glad to hear your not TT'ing this shed now, especially as you have a TN-S earthing system. Just bury the cable deep enough not to be subject to future damage, or better still duct it...

 

[Helm-Electric]

mv x A x dist / 1000

For 4mm SWA at say 30A over 20m is 6.6Volt drop. or 2.87%

So 4mm SWA will be fine for your application.

 

[malcolmsanford]

I'd have sort of hoped he would have this down by now unless he was waiting for the spring weather ...........

But nice to calc it Helm