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.
RATING
WIRE SIZE
UL LISTED
CE MARKED
WORLD-WIDE (WW)
12 A
14 AWG
—
—
16 A
12 AWG
4.0 mm
2
12 AWG or 4.0 mm
2
24 A
10 AWG
—
—
Table 3.3
Ground-strap wire gauge by
MPH2™ Rack PDU
rating
Vertiv
| Vertiv™ MPH2 Rack PDU Installer/User Guide
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