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AC Power Cord Specifications for a QFX3008-I Interconnect Device with Three-Phase Wye Wiring Trays

Most sites distribute power through a main conduit that leads to frame-mounted power distribution panels, one of which can be located at the top of the rack that houses the device. An AC power cord connects each wiring tray to the power distribution panel.


The QFX3008-I Interconnect device is pluggable type A equipment installed in a restricted-access location. It has a separate protective earthing terminal provided on the chassis in addition to the grounding pin of the power supply cord. This separate protective earthing terminal must be permanently connected to earth.


Power cords and cables must not block access to device components or drape where people could trip on them.

Each three-phase AC wiring tray has a metal wiring compartment that contains the AC terminal block and ground. There are two types of three-phase wiring trays: delta (three-wire) and wye (four-wire). The wye AC terminal block consists of four input terminals labeled N, L1, L2, and L3, from top to bottom in the common three-phase naming convention.

You must provide cords appropriate for your geographical location. The AC power cord wires insert into the AC terminal block on the wiring tray.

The power cords you provide must comply with the specifications listed in Table 1.


In North America, AC power cords must not exceed 4.5 m (approximately 14.75 ft) in length, to comply with National Electrical Code (NEC) Sections 400-8 (NFPA 75, 5-2.2) and 210-52, and Canadian Electrical Code (CEC) Section 4-010(3).

Table 1: Three-Phase Delta AC Power Cord Specifications

Electrical Rating

Plug Type

Plug Color

Cord or Cable Type

400 VAC, 32 A

International Electrotechnical Commission (IEC) 60309


The cord or cable must be HAR compliant, IEC 60245 (designation 60245 IEC 53) or IEC 60227 (designation 60227 IEC 53); or meet one of the following standards (North America): SV, SVE, SVO, SVOO, SVT, SVTO, SVTOO, SP-2, SPE-2, SPT-2, NISP-2, NISPE-2, NISPT-2, SP-3, SPE-3, SPT-3, SJ, SJE, SJO, SJOO, SJT, SJTO, SJTOO, S, SE, SO, SOO, ST, STO, STOO