A transformer secondary is a separately derived system. Where must its grounding and bonding arrangement be established?
- At the source or permitted first disconnect
- BBy bonding neutral to ground at every downstream panel
- COnly at the primary service disconnect
- DNowhere if the primary has an equipment ground
Why A is correct
A separately derived secondary needs its own system bonding and grounding connection at a location permitted by the applicable rule. Repeated downstream bonds create parallel neutral paths, while primary grounding does not establish the secondary reference.