cvirgil467
Senior Member
- Location
- NewYork
ok, no load is know about a building but the owner says he needs a 3000 amp service. How would you size the condcutors using 500kcm?
option 1 - using 75 deg c - take 80% of 380 = 304 amps.
3000 amps / 304 amps = 9.8 sets = 10 sets of 500 kcm
option 2 - using 90 deg c - take 80% of 430 = 344 amps
3000 amps / 344 = 8.7 sets = 9 sets of 500kcm
Option 3 - using 75 deg c - using 100% ampacity of conductor - 380 amps
3000 amps / 380 = 7.8 sets = 8 sets of 500kcm
option 1 - using 75 deg c - take 80% of 380 = 304 amps.
3000 amps / 304 amps = 9.8 sets = 10 sets of 500 kcm
option 2 - using 90 deg c - take 80% of 430 = 344 amps
3000 amps / 344 = 8.7 sets = 9 sets of 500kcm
Option 3 - using 75 deg c - using 100% ampacity of conductor - 380 amps
3000 amps / 380 = 7.8 sets = 8 sets of 500kcm