Installation
150-454-111-06
14
February 25, 2000
HRE-454
3
Using a megger-type Ohmmeter, measure the resistance between enclosure ground and the ground rod. The
resistance must be 25
Ω
or less.
4
If the requirement is met, proceed to Step 5. If the requirement is not met, follow the procedure normally used
for the enclosure you are mounting to lower the resistance to ground to comply with the requirement before
proceeding to Step 5.
5
Using 6 AWG cable, connect the grounding lug on the enclosure to the ground rod. Torque the grounding lug
between 18 and 22 inch-pounds.
6
Using 6 AWG cable, connect the main cable shield to the ground rod.
7
If commercial power ground exists, bond telephone ground to power ground as a safety measure.
8
Using a megger-type Ohmmeter, measure the main cable shield resistance to ground rods. The resistance
must be 5
Ω
or less.
9
If the resistance requirement is not met, ground the main cable shield every 2,000 ft.
Make sure you ground the HRE-
454
before splicing the cable stub into the main cable. This
grounding method (or an accepted local grounding method) must be in effect at all times to
safeguard personnel.
If the HRE-454 is improperly grounded, the LPU surge arrestors will not work and the enclosure
will be unprotected.
If the main feeder cable’s shield is bonded to the stub’s shield, the green insulated or bonded
stub shield wire, shown in
, should be disconnected from the metal card
cage base. This is recommended to reduce service affecting noise from being injected into the
doubler circuits from circulating ground loop currents, and to help inhibit corrosion.