Steelhead
Senior Member
- Location
- Southeastern Wisconsin
- Occupation
- Industrial Maint/Journeyman
I need some clarification on some things:
A breaker in a subpanel feeding the primary of a transformer - this is considered a branch circuit - correct?
Secondary conductors with no OCPD at their point of supply need to follow 240.21(C) without exception - correct?
These conductors are still "secondary conductors" up to the first OCPD - correct?
So even if you size the secondary conductors at 125% of the transformer secondary current rating you still have to follow 240.21(C) - correct?
In our facility we have a 112KVA transformer feeding a machine with OCP integrated into the disconnect of the machine. The seconday conductors are sized to 125% of the FLA of the transformer and travel about 50 feet to the machine disconnect. My interpretation of the code says this is a violation - correct?
Thanks in advance for your help!
A breaker in a subpanel feeding the primary of a transformer - this is considered a branch circuit - correct?
Secondary conductors with no OCPD at their point of supply need to follow 240.21(C) without exception - correct?
These conductors are still "secondary conductors" up to the first OCPD - correct?
So even if you size the secondary conductors at 125% of the transformer secondary current rating you still have to follow 240.21(C) - correct?
In our facility we have a 112KVA transformer feeding a machine with OCP integrated into the disconnect of the machine. The seconday conductors are sized to 125% of the FLA of the transformer and travel about 50 feet to the machine disconnect. My interpretation of the code says this is a violation - correct?
Thanks in advance for your help!