Cisco StackPower cable ≈30 cm / 1 ft CAB‑SPWR‑30CM

The Cisco CAB‑SPWR‑30CM is a StackPower cable (≈30 cm / 1 ft) used to interconnect the StackPower ports on Cisco Catalyst switches (e.g., 3750X, 3850, 9300, and Meraki MS390). It enables switches to share or back up power within a stack for redundancy and efficiencyTechnical Details Length: 30 cm (1 ft)—ideal for adjacent switch mounting  Connectors: Proprietary StackPower plug—distinct from data stacking cables Stacking support: Up to 4 switches in ring topology, up to 9 with star topology (XPS modules) Hot-swappable: Can be plugged/unplugged without interrupting switch operation Benefits Power pooling: Consolidate PSU capacity across the stack for more efficient PoE usage Redundancy: If one PSU fails, other units compensate — enabling "zero-footprint redundancy"  Compact and neat: Short length avoids cable clutter—no slack to manage Summary Table Feature Details Cable Type StackPower proprietary Length 30 cm (1 ft) Use Power sharing & redundancy among StackPower‑capable switches Compatible with Cisco Catalyst 3750X/3850/9300, Meraki MS390 Interconnects Up to 4 (ring) or 9 (star w/ XPS) Hot‑swappable Yes Installation Tips Connect the cables between adjacent switches’ StackPower ports (ensure secure latching). Power on the switches and monitor PSU health – they will automatically load balance. Use red/green marking (on some cables) to indicate flow direction if needed. Simply remove cables during PSU replacement—stack remains powered  Download