Question: A 50HP 460V 3ph induction motor, svc factor 1.0, what is the initial maximum size of protection device?
OP is correct about 65A full load current.
OP is correct about 1.15 multiplier based on 430.32(A)(1), giving 74.75A.
In 5-A increments, I'd want 75A, but that's not a choice. The...