Alternative Grounding Method; Local Power Source Wire Run - ADTRAN Total Access 374 Installation And Maintenance Manual

Total Access 374 4-POTS, 4-GigE MDU ONT Installation and Maintenance Guide
7. Attach the 6 AWG ground wire to the side of the subscriber premises with stainless steel
8. Clean the MGN connector with emery cloth to insure a stable connection.
9. Coat the connection with a metal corrosion preventative.
10. Connect the ground wire to the ground lug and tighten.
11. Attach a Warning Ground Tag to this grounding connection.

Alternative Grounding Method

The following is an alternative grounding method if MGN is not available.
Article 800-11c of the National Electrical Code (NEC) states for the purpose of grounding the
point of entry for communications wiring and cables should be within 20 feet (6.1 meters) of
the electrical service entry point. Where this is impractical, a separate grounding electrode
should be installed in compliance with Article 800-40-(b)(3) and bonded in compliance with
Article 800-40(c) and (d).
Briefly stated:
■ A copper clad steel ground rod should be driven into the earth at least 8 feet (2.4 meters)
■ An Earth Resistance Megger Test Set is used to determine the resistance of the earth
■ The secondary electrode must be spaced at least 8 feet (2.4 meters) from the primary
■ The 6 AWG ground wire should be connected to the ground rod with a UL Listed ground

Local Power Source Wire Run

!
WARNING
■ Before making any power connections to this equipment, verify the power
is off (fuse removed/breaker tripped).
■ This equipment should only be operated from the type of certified/listed
power supply recommended by the manufacturer.
2-8
half moon clamps or tie-wrap the ground to the riser conduit of the buried fiber cable
drop. When using tie-wraps wait until the Limited Power Source (LPS) wire run has
been installed and tie-wrap both the 6 AWG ground wire and the LPS wire run to the
riser conduit of the buried fiber drop cable.
deep.
electrode. The NEC requires this ground rod conduction to earth to be no more than 25
ohms of resistance. If 25 ohms cannot be achieved with a single electrode (ground rod), a
secondary electrode must be used and bonded to the primary electrode using a 6 AWG
minimum copper ground wire.
electrode.
clamp.
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