I hope I can describe this adequately;
Say you have a 2000A switchboard and it is shipped with mechanical lugs. You need to parallel X4 loco cable to make up the connections at terminal end and therefore cannot use the mechanical lugs, opting for compression terminals that have two holes. The aluminum bus only has a series of single holes drilled for the mechanical lugs. Would you:
1. Drill the bus to accept the second hole of the compression terminal and torque
2. Cut off the second hole on the compression terminal and connect with one bolt
3. Connect only through one hole and let the other fly
4. Get single hole terminal, assuming they are manufactured
5.The option I am missing
The sticking point in my mind is the ampacity needed in SQUARE INCHES of contact area- approximately 6 in^2 vs. 3in^2 -is not adequate to pass the 500A max current but can't place my finger on it in NEC or the Red Book.
Thoughts?
Say you have a 2000A switchboard and it is shipped with mechanical lugs. You need to parallel X4 loco cable to make up the connections at terminal end and therefore cannot use the mechanical lugs, opting for compression terminals that have two holes. The aluminum bus only has a series of single holes drilled for the mechanical lugs. Would you:
1. Drill the bus to accept the second hole of the compression terminal and torque
2. Cut off the second hole on the compression terminal and connect with one bolt
3. Connect only through one hole and let the other fly
4. Get single hole terminal, assuming they are manufactured
5.The option I am missing
The sticking point in my mind is the ampacity needed in SQUARE INCHES of contact area- approximately 6 in^2 vs. 3in^2 -is not adequate to pass the 500A max current but can't place my finger on it in NEC or the Red Book.
Thoughts?
