pure Nickel cable grouping factor

[Dave5040]

Where can I find specific information on pure Nickel glass woven insulated Conductors for Cable grouping factors? I want to know the derating for 60cables @1.5mm in conduit 3 Phase

 

[pc1966]

Interesting question. What current capacity are you assuming in the first place?

The de-rating factor is probably much the same as for normal conductors, in the sense that if you have a specific temperature rise allowed, then bunching lots of cables together has more heat added compared to the ability of the bunch to dissipate heat.

But equally some cables like that are rated to 400C (or even as high as 700C in some case) which is probably beyond what the conduit could ever survive!

 

[ipf]

Where can I find specific information on pure Nickel glass woven insulated Conductors for Cable grouping factors? I want to know the derating for 60cables @1.5mm in conduit 3 Phase

Sounds like one big conduit, does that!
A bit more detail?

 

[freddo]

Sounds like one big conduit, does that!
A bit more detail?

1.5" conduit will accommodate 61 stranded pvc 1.5mm conductors according to the OSG, though with the extra insulation thickness it is likely you would have to go up to 2" to avoid overfilling the conduit.

 

[Dave5040]

the conduit is 50mm, the cable is 1.5mm2, but i cant find anywhere with Cable correction factors for Nickel cable? where can i find this? i want to derate the cable suitably, so i get my CSA correct for the current being pulled, thanks

 

[ipf]

1.5" conduit will accommodate 61 stranded pvc 1.5mm conductors according to the OSG, though with the extra insulation thickness it is likely you would have to go up to 2" to avoid overfilling the conduit.

Be difficult with 32m.....2'' conduit....is it existing?
edit. See it is. Hope it's not too long a run...and use gloves.

 

[freddo]

i want to derate the cable suitably, so i get my CSA correct for the current being pulled, thanks

Contact the cable manufacturer, they should be able to provide you with some details.

 

[Dave5040]

Yes I was thinking manufacturer

the cable has a capacity of 15A the heater is 7a but I believe given the ambient heat andhow many cables it will be less than 15a!