Flexible 500 KCMIL 1/C 600v cable ?

[Dale001289]

I have a short run of about 12’ but I need extremely flexible cable for tight bend radius inside the junction box
What’s the best option for this application?


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[kwired]

bigger junction box

 

[infinity]

Diesel locomotive cable has super fine stranding. You would need to ensure that the connectors were listed for the cable and that it's rated as one of the permitted types in Article 310.

 

[Dale001289]

bigger junction box

not an option unfortunately


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[Dale001289]

Diesel locomotive cable has super fine stranding. You would need to ensure that the connectors were listed for the cable and that it's rated as one of the permitted types in Article 310.

Thanks infinity


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[Todd0x1]

Take a look at cobra x-flex its listed as THW probably has a better bend radius than dlo and is likely smaller OD.

 

[don_resqcapt19]

Just don't try to use the manufacturer's published ampacities, because, in most cases, they are in free air and at 90°C....and it is unlikely you can use that ampacity for your installation.

 

[Jraef]

DLO cable comes in different sizes. So you will either get 444kCMIL or 535kCMIL.

 

[don_resqcapt19]

Because of the nonstandard circular mil area of DLO, you cannot find DLO ampacities in the ampacity tables. A couple of cycles ago this was added to 310.15 to address that issue.

Under engineering supervision, ampacities of sizes not shown in ampacity tables for conductors meeting the general wiring requirements shall be permitted to be determined by interpolation of the adjacent conductors based on the conductor’s area.

 

[Dale001289]

Because of the nonstandard circular mil area of DLO, you cannot find DLO ampacities in the ampacity tables. A couple of cycles ago this was added to 310.15 to address that issue.

Very good to know. Thanks Don


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[Dale001289]

Take a look at cobra x-flex its listed as THW probably has a better bend radius than dlo and is likely smaller OD.

I will definitely look into this! Thanks


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[infinity]

I have a short run of about 12’ but I need extremely flexible cable for tight bend radius inside the junction box

Just curious as to why is the box so small? It this within a piece of equipment?

 

[Strathead]

not an option unfortunately


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Then your installation must not be required to be installed per the NEC? specifically 314.28?

 

[Knightryder12]

I have a short run of about 12’ but I need extremely flexible cable for tight bend radius inside the junction box
What’s the best option for this application?


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What about type G-GC cable? I have used that on projects where the machinery moves. It's way more flexible that THHN.

 

[electrofelon]

Because of the nonstandard circular mil area of DLO, you cannot find DLO ampacities in the ampacity tables. A couple of cycles ago this was added to 310.15 to address that issue.

What they should have done is allow linear interpolation without engineering supervision, and non linear interpolation with engineering supervision.

 

[Birken Vogt]

What they should have done is allow linear interpolation without engineering supervision, and non linear interpolation with engineering supervision.

The problem with that is, the capacity of conductors per cmil decreases more than linearly as you go up in size, due to the center having to dissipate all the way through to the edges. One reason parallels are more economical.

Maybe they should just include the capacity of the common DLO sizes, 444, 535 etc in the tables somehow.

 

[Birken Vogt]

What about type G-GC cable? I have used that on projects where the machinery moves. It's way more flexible that THHN.

G-GC is similar to SO. It is big and bulky with a thick jacket. Not what you want in a cramped gutter or something. Maybe you are thinking of type W which is available as single conductor. But I am not sure if the rules allow it as permanent or whatever.

 

[Todd0x1]

Because of the nonstandard circular mil area of DLO, you cannot find DLO ampacities in the ampacity tables. A couple of cycles ago this was added to 310.15 to address that issue.

i dont know about 500, but a couple manufacturers make dlo/rhw in standard sizes, i know ive seen 4/0

 

[Birken Vogt]

i dont know about 500, but a couple manufacturers make dlo/rhw in standard sizes, i know ive seen 4/0

The sizes are standard until you get beyond 4/0, that is where it gets weird

 

[petersonra]

What they should have done is allow linear interpolation without engineering supervision, and non linear interpolation with engineering supervision.

Only engineers can do simple math.