Rack Grounding Strap; Table 2-3: Ground-Strap Wire Gauge By Mph2 Rating - Emerson Network Power MPH2 User Manual

2.3.5

Rack Grounding strap

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.
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.
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.
Rating
12 A
16 A
24 A
32 A
40 A
48 A
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
Table 2-3 Ground-strap wire gauge by
NA, UL Listed EU, CE Marked
14 AWG
12 AWG
10 AWG
—
6 AWG
6 AWG
rating
MPH2
Wire Size
WW
— —
2
4.0 mm 12 AWG or 4.0 mm
— —
2
—
6.0 mm
— —
— —
18
Installation
2
(see Figure 2-7).
® ™
Emerson MPH2 User Manual