6mm 3 phase 20mm conduit

[Drewbaba]

What's everyone's thoughts on 4 conductors 3 phase 415v at 6mm running 3.5mt in 20mm conduit domestic use. 9

 

[telectrix]

what's the load corrent?

 

[andyb]

The on site guide has tables for this, factors for the conduit for certain lengths and size and factors for the cable. Have a quick look, sounds okay though.

 

[Drewbaba]

what's the load corrent?

Fairly low it's a 3 bed house, but no heating or hot water there is a small sauna tho.

 

[Drewbaba]

The on site guide has tables for this, factors for the conduit for certain lengths and size and factors for the cable. Have a quick look, sounds okay though.

Found it a bit had to calculate as it's 3 phase,

 

[andyb]

Found it a bit had to calculate as it's 3 phase,

Don't think that's relevent Drew, 4x6mm conductors will have a total factor that needs to be less than the conduit factor. I'll have a look when I get to my van.

 

[andyb]

The rating for 6mm is 58 for each conductor, and the conduit rating for 3.5m straight is 290
Don't forget though that this is a guide.

 

[Drewbaba]

The rating for 6mm is 58 for each conductor, and the conduit rating for 3.5m straight is 290
Don't forget though that this is a guide.

Not grate but very hard to get 32mm conduit in place.. thank mate

 

[andyb]

Not grate but very hard to get 32mm conduit in place.. thank mate

25mm?

 

[Darkwood]

SWA then, given it would be a similar size to the actual singles and conduit method and you have much more forgiving factors for its installation too.

 

[westward10]

I am guessing this is in Sweden so requirements in the UK may not be applicable.

 

[Drewbaba]

25mm?

Don't have it in Sweden

 

[freddo]

Don't have it in Sweden

That sounds quite limiting! 32mm is a huge step up from 20mm.

 

[Marvo]

Most countries have regs regarding the percentage you can fill conduits without current derating.... I'm guessing the UK might be the exception though and I'm not sure about Sweden either.

3 x 6mm phase wires plus 1x 6mm insulated CPC would just scrape through according to the South African regs.

No 25mm conduit in Sweden....wow....every day is a school day.

 

[andyb]

Didn't realise it was in Sweden. If the regs are as ours you could always calculate the size of the earth, could get it down to 4mm or maybe 2.5mm.