Wiring an office 35 meters uo the garden

[Dustydazzler]

snap. but with a bit of diversity thrown in 6.0mm on a 40A would probably do.

If it were my own house I would possibly chance 4mm....

I’m a cheap skate

 

[Ted Curly]

Yh I will do the calculations later to find out the total design load, volt drop ect, I just thought 16mm couldn't do no harm (apart from the price) as its current carrying capacity has got to be around 70amps when in ground, can just down size the breakers

 

[westward10]

You need to apply some diversity to ascertain a realistic load but I doubt anything below 16mm will cut it for volt drop on the lighting circuits.

 

[telectrix]

this 3% for lighting is back in the dark ages with heat lamps. when LED drivers are happy with 90V input.

 

[Ted Curly]

Yes I have got the calculations to do for 24 spot lights, 9 sockets and 6 spurs 3 of them heaters, plus few other bits will present them later . I'm concerned about the size of the swa to use as the cable will be buried in the ground for a good 15-20meters and thus lowering the current carrying capacity 10mm in ground is around 58amps where as 16mm is 75amps.. Thanks guys

 

[davesparks]

I would like to see the termination of 16mm swa in a kmf

Why, it's not very interesting. I've got pictures somewhere of the times I've done it, but it's pretty simple to do.
My preferred soloution is to make off the SWA into a 2x2 steel adaptable box with one side cut out. The cut out side butt's up to the KMF with a paxolin plate between

The other option is a brass angle plate to hold the gland and cut the cable cover supplied with the KMF to suit.

 

[telectrix]

buried will not lower the ccc. due to the ambient temp.below ground being around 10deg.C, when the basic ccc calcs.are done for 20deg.C,