What Is CAB-L620P-C19-US= in Cisco Power Infrastructure, How Does It Safeguard High-Current Deployments, and When Is It Mandatory for US-Based Installations?

CAB-L620P-C19-US= Overview: Purpose and Key Features

The ​​CAB-L620P-C19-US=​​ is a ​​6.2-foot (1.88-meter) shielded power cable​​ designed by Cisco for ​​20A/250V AC power delivery​​ to high-density networking and compute equipment. Featuring a ​​C19 connector​​ (device end) and ​​NEMA L6-20P plug​​ (power source end), it connects Cisco UCS servers, Nexus switches, and HyperFlex nodes to ​​208–240V AC PDUs or UPS systems​​ in compliance with US electrical codes.

Critical Technical Specifications and Safety Compliance

• ​​High-Current Capacity​​: Rated for ​​20A continuous load​​, it supports power-hungry devices like Cisco UCS C480 ML servers or Nexus 93180YC-FX3 switches without thermal risks.
• ​​EMI/RFI Mitigation​​: ​​Triple-layer shielding​​ (foil, braid, and drain wire) minimizes interference in environments with variable-frequency drives (VFDs) or radio transmitters.
• ​​Certifications​​: Meets ​​UL 62, UL 817, and NFPA 70 (NEC)​​ standards for flammability, plug safety, and installation compliance—critical for US data center audits.

Addressing Core Deployment Concerns

​​Q: Why use CAB-L620P-C19-US= instead of generic C19 cables?​​
A: Generic cables often lack ​​NEMA L6-20P plugs​​ required for US 208V PDUs, risking improper mating and arcing. Cisco’s design includes ​​safety interlocks​​ to prevent accidental disconnection.

​​Q: Is this cable compatible with three-phase power setups?​​
A: No—it’s engineered for ​​single-phase, 208–240V AC systems​​ commonly used in US enterprise data centers. For three-phase Cisco deployments, use CAB-3PHASE-series cables.

Sourcing Genuine CAB-L620P-C19-US= Cables

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Field Experience: The Cost of Cutting Corners

After troubleshooting a UCS chassis outage caused by a melted third-party cable, I mandate ​​CAB-L620P-C19-US=​​ for all 20A deployments. Its ​​105°C-rated insulation​​ handles peak loads during GPU-intensive AI workloads—something cheaper alternatives fail under. For US-based teams, skipping this cable to save 50risks50 risks 50risks50k+ in downtime, making it a non-negotiable component in any high-availability stack.