Adding a generator changes the dynamics of your earthing system. The standard mandates specific measures to ensure that protection against indirect contact (using RCDs or overcurrent devices) remains effective, regardless of which source is active. It specifically addresses the neutral conductor connection and earthing requirements during changeover operations.
Ensuring equipment meets protection standards against electric shock and thermal effects. iec 60364 part 551 pdf
"You see this section?" Arthur pointed to a diagram in his IEC 60364-5-551 PDF for his young apprentice, Leo. "Clause 551.4. Protection against indirect contact. If we lose the main utility ground, this generator has to be its own island of safety". Adding a generator changes the dynamics of your
The standard is structured into several critical clauses that guide engineers and installers: iec 60364 part 551 pdf