Termination temp

[hhsting]

I have DC equipment call it X which draws 350A max.

I have 24x20A fuse factory installed in upstream DC equipment call it Y that feeds the equipment X with feeder cable call it Z.

The feeder cable Z connects to one terminal in equipment Y and other side one terminal on equipment X.

Questions;

1. Can one use NEC 2017 section 110.14(C)(1)(b) to determine temperature termination for the above case? Note above case is DC

2. NEC 2017 section 110.14(C)(1)(b) says to use 75C or higher for termination temp for circuit over 100A. So does this mean their is no 60C termination for circuit over 100A?

 

[pv_n00b]

1. Can one use NEC 2017 section 110.14(C)(1)(b) to determine temperature termination for the above case? Note above case is DC

2. NEC 2017 section 110.14(C)(1)(b) says to use 75C or higher for termination temp for circuit over 100A. So does this mean their is no 60C termination for circuit over 100A?

There's nothing I see that limits the application of 110.14 to AC circuits.
The guidance in 110.14(C) allows us to imply the rating of unmarked terminations based on ampacity and wire size. Maybe there are old terminations out there that are 60C even though they are in a 100A circuit but the NEC assumes they don't exist.

 

[tom baker]

In 40 years I have seen only one 60 deg c terminal, on a old dryer recp on a house I purchased in 1979.

 

[paulengr]

The temperature is on the terminal itself. The enclosure temperature is/should be different.

 

[ramsy]

Questions;

1. Can one use NEC 2017 section 110.14(C)(1)(b) to determine temperature termination for the above case? Note above case is DC

2. NEC 2017 section 110.14(C)(1)(b) says to use 75C or higher for termination temp for circuit over 100A. So does this mean their is no 60C termination for circuit over 100A?

Are you trying to use cable with insulation rated for 60°C?