[Cisco Equipment and Related Hardware] How must the power to a system with dual power supplies on a Cisco Nexus switch be connected?

In a Cisco Nexus switch with dual power supplies, the recommended method is to connect each

power supply to a separate power source (Option C). This ensures power redundancy and fault

tolerance.

If one power source fails (e.g., due to a power outage or circuit failure), the switch can continue

operating uninterrupted using the second power source. Connecting both to a single source (Option

D) defeats the purpose of redundancy.

Reference: Supporting Cisco Devices for Field Technicians (FLDTEC) – Cisco Equipment and Related

Hardware