Installation
18
Emerson
®
MPH2
™
User Manual
2.3.5
Rack Grounding strap
Units with factory-attached input-power cords have an grounding conductor internal to the case. The rack
grounding strap establishes the same ground reference between the MPH2 Rack PDU and the rack.
1. Insert a spring nut into the rack frame near the grounding point on the MPH2 (see
Figure 2-3
for
inserting the spring nut).
2. Attach a ground wire to the rack with a screw, washer and lock washer. The screw is secured to the
rack’s frame with a spring nut.
3. Use a second field-supplied screw, washer and lock washer to secure the ground wire to the MPH2.
The connection point is marked with an earth-ground symbol
(see
Figure 2-7
).
NOTE
Ensure that the safety-earth connection at the input-power-source receptacle
is made before any equipment is connected to Emerson’s MPH2 Rack PDU.
NOTE
The grounding strap may be used with MPH2 Rack PDUs that have integral input-power cords and
units that have hard-wired input-power cords. The strap supplements the internal grounding
conductor of the integral power-supply cord.
The grounding strap may be particularly useful when the rack is on a raised floor.
Table 2-3
Ground-strap wire gauge by
MPH2
rating
Rating
Wire Size
NA, UL Listed
EU, CE Marked
WW
12 A
14 AWG
—
—
16 A
12 AWG
4.0 mm
2
12 AWG or 4.0 mm
2
24 A
10 AWG
—
—
32 A
—
6.0 mm
2
—
40 A
6 AWG
—
—
48 A
6 AWG
—
—
Summary of Contents for MPHR2204
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