hardworkingstiff
Senior Member
- Location
- Wilmington, NC
Looking for more information and understanding I came across this question that was never answered, so I thought I would post it here.
I tend to think this is a good question and would love to hear the correct answer.
Davidbeach,
Is there a document put out by NFPA or UL that states that even with an oversized mechanical lug, the ability to carry heat away from the termination is still based on the #4/0 conductor?
Wareagle,
The mechanical lugs have a range of "#4/0 to 500kcmil". They are Burndy catalog #KA34. Our #4/0 cable does not physically fit inside of a #KA28. It seems to me that if the #4/0 cable terminated to a #KA34, and the set-screw in the lug is torqued properly, that we would be able to use the ampacity of 500kcmil per table 310.16 for the termination (but not for the conductor). This is because the lug is big enough to carry 500kcmil worth of current and not exceed 75C. Right? Wrong? What are your thoughts? Is there any official documentation to back a right or wrong response?
I tend to think this is a good question and would love to hear the correct answer.