3 Phase Supply, Need A Seperate Earth

[rumrunner]

you can get them upto 95mm,don't no why companies can't read cataloges .iv'e just put a 70mm 4 core in with 6.0cpc (computer say's so)computers can't read cat.either
yours benji

6.0 mm seems a bit on the lite side ,are you sure its correct

 

[wayne]

looked at the cleveland cable site ,yes they do 25x5 core but its got a 25 mm earth
running a seperate 16mm earth would be cheaper

 

[benji]

yes 6.0mm does look small ,but comp. calc. prog.say,s its ok,it looks crap but we have elec. designers who do all the calcs. for us?


i would sooner install a 5c25mm than a 4c +16.0cpc ie only one cable to pull &only one to g&t

yours benji

 

[ian.settle1]

Why Not Use A 5core Swa
Yours Benji

Because it will cost a lot more than running a seperate CPC

 

[wayne]

the installation costs would be the same as you can generally get away with installing the swa and earth at the same time
that just leaves the price per metre of 25mm 5c swa versus 25mm 4c swa & 16mm earth

 

[ian.settle1]

the installation costs would be the same as you can generally get away with installing the swa and earth at the same time
that just leaves the price per metre of 25mm 5c swa versus 25mm 4c swa & 16mm earth

Thats what I ment it will cost more to run a 5-core swa than 4-core and seperate 16mm cpc

 

[wayne]

thats what i figure too, 25mm 5c isnt commonly used
in fact i've never seen it used

 

[ian.settle1]

I think it may be one that you have to specially order therfore cost goes through the roof

 

[wayne]

I think it may be one that you have to specially order therfore cost goes through the roof

amen to ian(enoch powell)settle

 

[Rory166]

Without knowing the full facts I see that no mention has been made of making the remote supply TT. This has the advantage of not requiring a CPC. The Swa is broken on entry to the remote building and is bonded at source. RCD protection is of course required and an earth stake.

 

[scotsparky]

well as the post is over 2 years old i am guessing the jobs done.

 

[johnboy6083]

well scots sparky as you know, if a job's worth doing its worth dragging out! (unless on price)