CharlesK
Member
- Location
- Glendale, CA, USA
Journeyman Electrician Question:
If a single-phase motor draws 50 amperes and its branch circuit is protected by a 150-ampere nontime-delay fuse, the feeder overcurrent protective device may not be larger than:
A.) 87.5 amperes C.) 300 amperes
B.) 100 amperes D.) 150 amperes
Answer: D.) 150 amperes NEC ART. 430.62
Followup Question:
If we size the feeder conductors to 125% of the motor FLA, the conductor size is #6 AWG at 75C. This conductor is rated for 65 amperes.
For a feeder of a long distance, what protects the conductors between the feeder OCPD and the branch circuit fused protection?
If a single-phase motor draws 50 amperes and its branch circuit is protected by a 150-ampere nontime-delay fuse, the feeder overcurrent protective device may not be larger than:
A.) 87.5 amperes C.) 300 amperes
B.) 100 amperes D.) 150 amperes
Answer: D.) 150 amperes NEC ART. 430.62
Followup Question:
If we size the feeder conductors to 125% of the motor FLA, the conductor size is #6 AWG at 75C. This conductor is rated for 65 amperes.
For a feeder of a long distance, what protects the conductors between the feeder OCPD and the branch circuit fused protection?
