Alternative Grounding Method - ADTRAN Total Access 300 Installation And Maintenance Practice

2 POTS, 2 GigE ONT Installation and Maintenance Practice
3. Attach the #6 ground to the side of the subscriber's premises with stainless steel 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 Local Power Source (LPS) wire run has been installed
and tie-wrap both the #6 ground and the LPS wire run to the riser conduit of the Buried
Fiber drop.
4. Clean the MGN connector with emery cloth to insure a stable connection.
E x t r e m e c a r e m u s t b e t a k e n w h e n a t t a c h i n g t h e g r ou n d
connectors to the utility (earth) ground rod. If the ground is
interrupted or disturbed in any way, an unsafe condition will exist.
Refer to the National Electrical Code (NEC) and state/local codes
for details on grounding requirements.
5. Attach the #6 ground from the ONT to the MGN connector with the appropriate UL
approved ground clamp.
6. Coat the connection with a metal corrosion preventative.
7. Attach a Warning Ground Tag to this grounding connection.

Alternative Grounding Method

This section describes 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 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 deep.
• An Earth Resistance Megger Test Set is utilized to determine the resistance of the earth
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 by used and bonded together using a #6 copper ground wire.
• The secondary electrode must be spaced at least 8 feet from the primary electrode.
• The #6 ground wire should be connected to the ground rod with a UL Listed ground clamp.
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