Installation
150-458-100-05
12
February 23, 2000
HRE-458 List 1, List 1B, and List 2
Figure 5.
Grounding for Pole-Mounted Unit
3
Use a megger-type Ohmmeter to measure the resistance between enclosure ground and the ground rod. The
resistance must be 25
Ω
or less.
4
If the resistance requirement is met, proceed to Step 5. If the resistance requirement is not met, follow local
practice to lower the resistance to ground to comply with the requirement before proceeding to Step 5.
5
Use 6 AWG cable to connect the grounding lug on the enclosure to the ground rod. Torque the grounding lug
between 18 and 22 inch-pounds.
6
Use 6 AWG cable to connect the main cable shield to the ground rod.
ADC does not recommend connecting the main cable shield to the enclosure stub cable shield
because the stub shield is internally grounded to the enclosure ground lug. Connecting the
two shields creates a ground loop which could induce noise into the signal pairs. However, if
you choose to connect the main cable shield to the stub’s shield, and service affecting noise
is caused by the ensuing ground loops, disconnect the braid that connects the stub’s shield
to the enclosure’s ground plane.
HRE-458
No. 6 gauge wire
Grounding
lug
Ground
rods
No. 6 gauge wire
Bullet bond
Field side
CO side
Splice case
5 Ft. typical
Stub
