Transformer Secondary

[Boyd Hughes]

Where can I find the maximum length of an unprotected secondary conductor from a 75 kva Transformer fed with a 150A breaker, the panel on the secondary side has a 225A main. This is a 480v delta to 120/208v wye system

 

[infinity]

Take a look at 240.21(C).

Welcome to the forum.

 

[Boyd Hughes]

Take a look at 240.21(C).

Welcome to the forum.

Thank you for your Quick response. So 10' is the max length right?

 

[infinity]

Thank you for your Quick response. So 10' is the max length right?

10' or 25' if you can comply with 240.21(C)(3) or (6).