Alternative Grounding Method; Local Power Source Wire Run - ADTRAN Total Access 300 Series Installation And Maintenance Manual

Total Access 300 GigE SFU ONT with RF Overlay and SWRD Powering Installation and Maintenance Guide

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 used to determine the resistance of the earth
• 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.

Local Power Source Wire Run

!
WARNING
• Before making any power connections to this equipment, verify the power
is off (fuse removed/breaker tripped).
• Operate this equipment only from the type of certified/listed power supply
recommended by the manufacturer.
!
CAUTION
• Use caution when routing wires and cables. Avoid severe bending and
routing over sharp edges. Use grommet material when possible to avoid
wear on cable insulation.
• To reduce the risk of fire, use minimum no. 26 AWG telecommunications
line cord.
Installation of the Local Power Source (LPS) will be dictated by on‐site conditions and local
telephone company practices. Refer to "Power/Alarm Connector and UPS Connectors" on
page 29 and the following steps to complete the installation.
1.Install the Local Power Source (LPS) wire run from the ONT to the connector of the LPS
2. If necessary, tie wrap both the #6 ground wire and LPS wire run to the Buried Fiber Drop
28
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 copper
ground wire.
via the customer provided PVC conduit (or method used by your local telephone com‐
pany practice). ADTRAN recommends using 16 AWG at a maximum of 100 feet. For
alarm signals, ADTRAN recommends using 24 AWG. Do not plug in the UPS green con‐
nector at this time. This will be done after the subscriber wire/cables are terminated dur‐
ing turn‐up and testing.
riser conduit.
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