higher temp wires and termintion rules

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dm9289

Industrial Maintenance Electrician
Location
Pennsylvania
Occupation
Industrial process repair/ maintenance Electrician
On higher temp cables for example #14 Type Z rated at 150c the value in 310.15(B)18 is 34amps. In what condition can I use it at full ampacity?
In 110.14(C)(1) it speaks of the terminations limiting the cable use?

So I imagine there is no 150c Connectors?

So other than for ambient temp correction what use is this cable?

To me from 110.14(C)(1)(a) I will not be able to use the Type at over 15amps
 
They do make 150° C wirenuts but you would still end up connecting to equipment that is at best rated for 75° C. You may be able to use the higher temperature conductors at their ampacity if you transitioned at the 75 ° equipment with the proper size 75° C conductor and a 150° wire connector.
 
Thank you thats what i thought except i never new of the wire nut you spoke of.

To your knowledge is there other connectors rated at 150c for example for 500Kcm
 
The only ones I have ever seen were small wire nuts that we used on generator jacket heaters that required a minimum of 125° C conductors. Same ones we often use on fire alarm circuits.
 
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