NEC 700.32 requires each emergency system OCPD to selectively coordinate with all supply-side and load-side OCPDs.

NEC 700.32 requires each emergency system OCPD to selectively coordinate with all supply-side and load-side OCPDs.

• A. True
• B. False
• C. Not specified
• D. Sometimes

Answer: (A)

Selective coordination in this context means the emergency system’s overcurrent protection is arranged so that it trips only for faults within or immediately affecting the emergency path, while upstream supply-side devices and downstream load-side devices coordinate to avoid unnecessary loss of power. NEC 700.32 requires that the emergency system OCPD be selectively coordinated with all supply-side and load-side OCPDs, so protective actions are as targeted as possible and the emergency power remains available for life-safety loads during faults elsewhere. Therefore, the statement is true.

Selective coordination in this context means the emergency system’s overcurrent protection is arranged so that it trips only for faults within or immediately affecting the emergency path, while upstream supply-side devices and downstream load-side devices coordinate to avoid unnecessary loss of power. NEC 700.32 requires that the emergency system OCPD be selectively coordinated with all supply-side and load-side OCPDs, so protective actions are as targeted as possible and the emergency power remains available for life-safety loads during faults elsewhere. Therefore, the statement is true.