Disconnecting means required on transformer primary per 450.14

[philly]

If a 4.16kV-480V transformer is located outdoors and is fed directly from an upstream feeder breaker that only feeds this transformer but is some distance away and not in sight of the transformer, is this transformer required to have a primary disconnect switch per 450.14?

Is there any exception to this requirement that would not require a disconnect switch located on the primary of this transformer?

 

[augie47]

450.14 Disconnecting Means. Transformers, other than Class 2 or Class 3 transformers, shall have a disconnecting means located either in sight of the transformer or in a remote location.
Where located in a remote location, the disconnecting means shall be lockable in accordance with 110.25, and its location shall be field marked on the transformer

Possible ??

 

[david luchini]

If a 4.16kV-480V transformer is located outdoors and is fed directly from an upstream feeder breaker that only feeds this transformer but is some distance away and not in sight of the transformer, is this transformer required to have a primary disconnect switch per 450.14?

Is there any exception to this requirement that would not require a disconnect switch located on the primary of this transformer?

No exception that I know of. If the upstream breaker is lockable in the open position, then that would comply.

 

[philly]

No exception that I know of. If the upstream breaker is lockable in the open position, then that would comply.

So you are saying that if the upstream breaker is lockable in the open position (which it is) then this would satisfy the remote primary disconnect location under this section?

 

[philly]

Would anything change or be different if this transformer was located indoors? In other words is there a requirement to have a disconnect for a feeder entering a building?

 

[augie47]

I think you would then you would need to comply with 225.52 > 225.32 which, in most cases, will require a disconnect inside.