How Data Center Power Distribution Works
Data center power flows from the utility into a PDU (Power Distribution Unit), then to each server or network device through a detachable power cord. The right cord keeps racks organized, prevents overloads, and ensures uptime.
Common Data Center Power Cords
- C13 to C14 — the standard rack cord (10 A), connecting PDUs to servers and switches.
- C14 to C15 — high-temperature variant for hot aisle / switch gear.
- C19 to C20 — high-current cord (16 A) for servers and large PDUs.
- NEMA 5-15P to C13 — wall outlet to device (North America).
- CEE 7/7 to C13 — wall outlet to device (Europe).
Key Considerations
- Amperage: Match cord rating to the device draw — C13 for ≤10 A, C19 for ≤16 A.
- Length: Keep cords as short as possible to reduce clutter and voltage drop; standard rack lengths are 1 m, 1.8 m, and 3 m.
- Color-coding: Use color-coded cords (black/blue/red) to distinguish redundant A/B power feeds.
- Locking connectors: Use P-Lock / V-Lock IEC locking cords to prevent accidental disconnection in high-vibration racks.
- Certification: Data center cords should carry UL/cUL, CE/VDE, or CCC depending on the deployment region.
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