Determining Ont Enclosure Location - ADTRAN Total Access 300 Series Installation And Maintenance Manual

!
CAUTION
■ This equipment must be connected to a known, reliable earth ground at all
times during installation and service. Refer to the National Electrical Code
(NEC) and state/local codes for details on grounding requirements. A 6
AWG copper ground conductor shall be used to connect the equipment to
earth ground.
■ This equipment must be serviced by authorized service personnel only. All
repair procedures are detailed to allow sub-assembly level repairs ONLY.
Authorized service personnel should not attempt component level repairs
or circuit modifications to the printed circuit board. Improper repairs can
create a safety hazard.

Determining ONT Enclosure Location

The ONT can be mounted outdoors or indoors. In either case, use the requirements below
when mounting the ONT:
■ Proper airflow in and around the equipment must be maintained at its final mounted
■ The unit should be mounted within very close proximity of the AC electrical power meter
■ The unit should be mounted away from down spouts, permanent water sprinklers, or
■ Consideration should be given to proper clearances for opening of the swinging ONT
The height of the mounting can vary, however it is recommended that the enclosure be
installed at a vertical distance of approximately four feet (1.2 meters) from grade. This height
lends to ease of installation/repair. Naturally, this mounting is dependent on the height of the
customer provided inside wire and/or length or location of the buried fiber drop, which is
assumed to enter the ONT from the ground upwards.
The enclosure is mounted vertically. If at all possible, the enclosure should be surface
mounted on a flat surface.
!
WARNING
■ Ensure the ONT is grounded before making any other connections.
■ Before making any power connections to this equipment, verify the power
is off (fuse removed/breaker tripped).
■ The ONT needs to be powered by a UL Listed Power Supply (LPS) suitable
for the application with Output at LPS Levels.
■ The fiber locate wire or shield must not enter the NID. Insulate the exposed
conductor of the fiber locate wire and preferably terminate it at the ground
or outside the NID housing. Failure to do this can result in large surge
currents being induced into the ONT ground or large surge voltages arcing
to the ground connection or other wiring within the NID.
■ If an old NID exists, do not use it to make cross-connections between the
customers wiring and the ONT wiring. Failure to do this can result in large
surge currents being induced into the ONT interfaces from the old NID
612877GONT-5C
location. Siding and other building material should not be installed around the outside of
the enclosure to prevent excessive heat buildup and ultimate product failure.
where the Multi-Ground Neutral (MGN) is easily accessible (per NEC NFPA 70 article 840
requirements).
other water sources.
covers.
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