three phase

spidersparks · Oct 25, 2012

Hi chaps got a job coming up wiring in a kiln. We put it a single phase one in a wile back ran in two three core swa's one did the kiln the other did the a consumer unit. Customer now wants a three phase kiln put in and do away with the consumer unit as its no longer feeding anything, both swa's are 10mm cables but my question is can I run the three phase down one cable and the neutral and cpc down the other? the armoured will be earthed on both cables

All points be great cheers

David

GLENNSPARK · Oct 25, 2012

eh?...

Sintra · Oct 25, 2012

No. But you might be lucky and find the kiln doesn't require a neutral then you could use a 3 core SWA and use the armour as the CPC.

Guest55 · Oct 25, 2012

GLENNSPARK said:
eh?...

lolz
:-D

bugsy · Oct 25, 2012

sintra said:
No. But you might be lucky and find the kiln doesn't require a neutral then you could use a 3 core SWA and use the armour as the CPC.

Where you been?:cool3: ...

Guest55 · Oct 25, 2012

yes you can.
just make sure all conductors and cables are properly colour marked and labelled both ends.

Sintra · Oct 25, 2012

bugsy said:
Where you been?:cool3: ...

Was up to my neck with work at the Olympics so didn't get on here as much.

onfire25 · Oct 25, 2012

biff55 said:
yes you can.
just make sure all conductors and cables are properly colour marked and labelled both ends.

how can that work?......surley what goes in must come back out?

Guest55 · Oct 25, 2012

onfire25 said:
how can that work?......surley what goes in must come back out?

its very simple.
x2 3 core swa cables , both 10mm csa.
cable 1 - lines 1 , 2 & 3 - colour coded brown , black , grey.
cable 2 - neutral & earth and 1 unused core , colour coded blue , green/yellow.

snowhead · Oct 25, 2012

And the neutral will have somewhere between very little and nil load on it.

GLENNSPARK · Oct 25, 2012

biff55 said:
its very simple.
x2 3 core swa cables , both 10mm csa.
cable 1 - lines 1 , 2 & 3 - colour coded brown , black , grey.
cable 2 - neutral & earth and 1 unused core , colour coded blue , green/yellow.

wouldn`t you have a problem with eddy though on this arrangement Biff?

Guest55 · Oct 25, 2012

GLENNSPARK said:
wouldn`t you have a problem with eddy though on this arrangement Biff?

my understanding is that this isnt a problem if the lives are kept together glenn.

Sintra · Oct 25, 2012

GLENNSPARK said:
wouldn`t you have a problem with eddy though on this arrangement Biff?

Exactly it's just the same as running them in separate metallic conduits you wouldn't do it.

onfire25 · Oct 25, 2012

biff55 said:
its very simple.
x2 3 core swa cables , both 10mm csa.
cable 1 - lines 1 , 2 & 3 - colour coded brown , black , grey.
cable 2 - neutral & earth and 1 unused core , colour coded blue , green/yellow.

fair enough......can understand that way......just not the way i would of expected it could of been done....just seems odd.....i would offer ripping out single phase cables.....scrapping and offering the scrappage fee off the cost of the new cable......they think they are getting a good deal and you get a bit more work?!

GLENNSPARK · Oct 25, 2012

biff55 said:
my understanding is that this isnt a problem if the lives are kept together glenn.

just from what i`m aware....the neutral should always be within the same containment as the phase/s....now this is for metal containment...same with knockouts....so wouldn`t an SWA be a earthed mettallic containment Biff....yes yes i know its insulated but....