This discussion is locked.

You cannot post a reply to this discussion. If you have a question start a new discussion

Trefoil Parallel Cables

hi there, we have a project where we have specified 5 x 1c x 240mm2 cables on ladder for a 3ph CHP feed.

Having looked in the Guidance Notes we can see there is a laying configuration for 2, 3, and 4 cables in parallel but nothing for 5 singles in parallel.

we have asked the cable manufacturer for advice, and cables these days come from abroad, and we are unable to obtain advise on laying configuration.

is anyone able to throw any lighting on how the cables should be laid on the cable ladders? or where we might look to obtain that information?

hope someone can point us in the right direction.

0 Former Community Member over 4 years ago

Presumably you have no Neutral conductor to consider ?

If so, can you squeeze it down to 4 per phase or increase to 6 per phase (I appreciate this may also affect your ability to terminate

If so, it will be far easier to provide a mirrored group of either two deep or 3 deep

For example using Four per phase it would look like

L1 L2 L3 L3 L2 L1

L1 L2 L3 L3 L2 L1

It would give you current share within less than 10% variation

If you go for 6, then:

L1 L2 L3 L3 L2 L1

L1 L2 L3 L3 L2 L1

L1 L2 L3 L3 L2 L1

This would also give decent current share which could be absorbed in the effective increase from 5 to six conductors

Is it feasible to use much bigger cables - or a bus bar ?

Regards

OMS
Cancel
Vote Up 0 Vote Down

Cancel
0 Helios over 4 years ago

I think at 5 x240mm2 the relationship is more to do with weigtht , might be a minimum spacing requirement ?
Cancel
Vote Up 0 Vote Down

Cancel

Trefoil Parallel Cables

Community Rules & Guidelines