Rack Grounding Strap - Vertiv MPH2 Installer/User Manual

Rack pdu

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Figure 3.7 Installing horizontal MPH2™ Rack PDU in a rack with aluminum extrusions

3.3.5 Rack Grounding strap

NOTE: Ensure that the safety-earth connection at the input-power-source receptacle is electrically

connected before any equipment is connected to Vertiv™'s MPH2™ Rack PDU.

Units with factory-attached input-power cords have a grounding conductor internal to the case. The rack

grounding strap establishes the same ground potential between the MPH2™ Rack PDU and the rack

enclosure.

NOTE: The grounding strap may be used with rack PDUs that have attached input-power cords and

units that have hard-wired input-power cords. The strap supplements the internal grounding

conductor of the attached power-supply cord.

NOTE: When connecting multiple Class 1 devices, the ground leakage currents may be significant. The

additional external ground connection helps reduce ground impedance between the MPH2 PDU and

the rack enclosure. The rack-grounding strap may be ordered as an option.

The grounding strap may be particularly useful when the rack is on a raised floor.

Table 3.3

Ground-strap wire gauge by

RATING

12 A

16 A

24 A

Vertiv | Vertiv™ MPH2 Rack PDU Installer/User Guide

rating

MPH2™ Rack PDU

WIRE SIZE

UL LISTED

CE MARKED

14 AWG

—

4.0 mm

12 AWG

10 AWG

—

WORLD-WIDE (WW)

—

12 AWG or 4.0 mm

—

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