Chris Rankin
Member
It is my understanding that if your at 125% of the primary protection of a transformer you do not need secondary protection? Is this correct or is some type of disconnecting means needed? (600 V0lts or less.)
Transformer Secondary Protection.
- Thread starter Chris Rankin
- Start date
- Status
- Location
- Illinois
- Occupation
- retired electrician
Chris,
While the transformer may not require secondary protection, in most cases the secondary conductors will require OCPD. See 240.21(C).
Don
While the transformer may not require secondary protection, in most cases the secondary conductors will require OCPD. See 240.21(C).
Don
kingpb
Senior Member
- Location
- SE USA as far as you can go
- Occupation
- Engineer, Registered
Don is correct.
The intent of secondary protection is not for protecting the transformer, it is for the conductors and downstream equipment.
The intent of secondary protection is not for protecting the transformer, it is for the conductors and downstream equipment.
- Status