ring v radial

[i=p/u]

thought never mention it but hey its actualy came to light that a ring can be double the length of 4mm radial..

 

[telectrix]

if it goes out and back ( as a ring) then it will be double the length, as long as it takes the same route back. not if it returns via istanbul though.

 

[i=p/u]

gumbet baby here we go

 

[i=p/u]

if im running 4c 25mm swa from service fuse to new dis board(20M) and plan to run single core earth along side, what size do i need .. tn-c-s 0.07 ze....

calculator out in car, i would just run a 16mm but can i get away with 10mm along with armour????

 

[44ALLAN]

Why go to all that bother............use 5 core ?

 

[telectrix]

run 16mm. is it 3 phase?

 

[LlandrilloSpark]

Wired a three story house in four 32A 4mm radials as oppose to 32A rings, I really wished I hadn't, cost more, longer to run and had trouble with max Zs despite no faults found , had to knock it to 20A in the wbd

 

[kingeri]

I've said it before and I'll say it again, 4mm would be much more useful if it had a bigger CPC.

 

[tbs1983]

What size cpc is in 4mm? Is it 2.5mm?

 

[Guest55]

whats wrong with swa as cpc ?

 

[Des 56]

What size cpc is in 4mm? Is it 2.5mm?


Can't answer because the forum thinks the answer is too short

 

[44ALLAN]

Whats wrong with 5th core as cpc in 3p/n swa?

 

[shanky887614]

whats wrong with swa as cpc ?

over a certain size its cheaper to run a single earth than using an extra core in swa (also means in a 90mm swa you wouldnt have to struggle to terminate a 90mm at the other end)

 

[i=p/u]

as for 4mm radials ived devided it up and none will be over 40m using 26A as Ib...

yes 5core swa it is but was thinking maybe cheaper to just run 16mm alongside maybe 10mm

 

[Guest55]

over a certain size its cheaper to run a single earth than using an extra core in swa

for 25mm you dont need to do either.
use the swa for earth.