NIST 800-53 REV 5 • PHYSICAL AND ENVIRONMENTAL PROTECTION
PE-9(1) — Redundant Cabling
Employ redundant power cabling paths that are physically separated by {{ insert: param, pe-09.01_odp }}.
CMMC Practice Mapping
No direct CMMC mapping
NIST 800-171 Mapping
No direct NIST 800-171 mapping
Related Controls
No related controls listed
Supplemental Guidance
Physically separate and redundant power cables ensure that power continues to flow in the event that one of the cables is cut or otherwise damaged.
Practitioner Notes
This enhancement requires redundant power cabling paths that are physically separated so that a single event — fire, water damage, construction accident — cannot take out all your power at once.
Example 1: Run two independent power feeds to your server room from different electrical panels or different utility feeds. Route them through different physical pathways (different walls, floors, or conduit runs) so a fire or flood in one area does not affect both feeds.
Example 2: For server racks, use dual-corded servers with each power supply connected to a different PDU fed from a different circuit. This way, if one PDU or circuit fails, the server stays running on the other. Document your power redundancy design in your facility plans.