Single phase 208 volt primary. 480 volt single phase secondary. 10 kva transformer.(stepping up)
40 amp breaker on Primary.
Question 1 : secondary protection required??
Question 2 : Distance 1000 feet on secondary with 2 # 2 & 1 # 6 Ground. OK??
Question 3 : Step back down at end of 1000 ft to 208 volt Protection required Primary or secondary or both???
I got my ideas want yours .
Yoopersup
I have few question realted to the 10KVA transfomer size are you sized by 80% of rated transfomer ?
Next step here for rest of the question I will post the answer for each one
1] Yes you will need secondary protection either CB or Fuse { you will see more detail when I get the latter part}
2] #2 conductor is not a issue with that kind of load however you will have issue with EGC conductor I did check the voltage drop with #2's 1.5% VD {7.4V} #4's 2.4% {11.7V } #6's 3.9% {18.7V} #8's 6.2% {29.6V} keep in your mind I figures with 20 A @ 480V any larger loads than what I listed here the bet is off.
3]get nonfused primary disconnect switch that will be used as isolation switch useage and yes you will need OCPD on secondary side to finetuned to that load.
I will let other members here to see if they come up with answer if they are the same page or not.
Merci,Marc