Keri_WW
Senior Member
Info:
2000A service at 208V 3-phase, 5 sets 4#500 kcmil, 1#250 kcmil GND. I was planning on using a 6-way ductbank with one being a spare (all at 4"). I'm also using the rho value of 90 which is pretty typical for the area.
Question:
Table B.310.7 is showing me that I won't have the ampacity to meet the demand. Is adding another parallel set the best option that I have? I understand that the numbers might be off a bit because there isn't a chart for 5 ducts....
Thanks for any help and info you guys can provide. This is my first ductbank design from scratch and I want to make sure I understand it correctly before I get too far along.
Keri
:grin: :grin:
2000A service at 208V 3-phase, 5 sets 4#500 kcmil, 1#250 kcmil GND. I was planning on using a 6-way ductbank with one being a spare (all at 4"). I'm also using the rho value of 90 which is pretty typical for the area.
Question:
Table B.310.7 is showing me that I won't have the ampacity to meet the demand. Is adding another parallel set the best option that I have? I understand that the numbers might be off a bit because there isn't a chart for 5 ducts....
Thanks for any help and info you guys can provide. This is my first ductbank design from scratch and I want to make sure I understand it correctly before I get too far along.
Keri
:grin: :grin: