Installation
150-504-100-03
14
August 1, 2002
HRE-504 List 1, List 1B, and List 2
Grounding a Flat Surface Mounted Enclosure
To ground a flat surface mounted enclosure, perform the following steps:
1
Bond the main cable shield through the splice case using bullet bond, as shown in
2
Using a Megger-type ohmmeter, measure the resistance between enclosure ground and ground connection
point in the manhole. The resistance must be 25
W
or less.
3
If the resistance is not 25
W
or less, follow the procedure used for mounting the enclosure to lower the
resistance to ground. If the resistance is 25
W
or less, continue to step 4.
4
Use a 6 AWG cable to connect the ground lug on the HRE-504 to the ground connection in the manhole.
Torque the grounding lug to 18 and 22 inch-pounds (2.0 and 2.5 Newton/meters).
5
Use a 6 AWG cable to connect the main cable shield to the ground connection in the manhole.
6
Using a Megger-type ohmmeter, measure the main cable shield resistance to manhole ground. The resistance
must be 5
W
or less.
7
If the resistance requirement in
is not met, ground the main cable shield every 2,000 feet (610 m).
Ground the HRE-504 before splicing the cable stub into the main cable. This grounding method
or an accepted local grounding method must be in effect to safeguard personnel.
If the HRE-504 is improperly grounded, the Lightning Protection Unit (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 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 help inhibit corrosion.
Summary of Contents for 150-2202-01
Page 4: ...Inspecting the Shipment 150 504 100 03 iv August 1 2002 HRE 504 List 1 List 1B and List 2...
Page 8: ...List of Tables 150 504 100 03 viii Augusr 1 2002 HRE 504 List 1 List 1B and List 2...
Page 53: ...Appendix D Abbreviations 150 504 100 03 46 August 1 2002 HRE 504 List 1 List 1B and List 2...
