michaelsharp
Member
- Location
- cincinnati, ohio usa
when sizing overcurrent protection for a three phase transformer 480v primary and 208/120 secondary, both primary and secondary will have overcurrent protection,
so based on table 450.3(b) should I be using 250% for primary and 125% for secondary or can I use 125% for both primary and secondary?
so based on table 450.3(b) should I be using 250% for primary and 125% for secondary or can I use 125% for both primary and secondary?
