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Model 371 Protector Assembly
Installation by Trained
Technician Only
WARNING: Failure to follow these instructions could lead to
personal injury and property damage. It will also void
product warranties on all protected equipment.
Model 371 Protector Assembly consists of the following parts:
Model 349-2LG MKII, Primary Protector
Model 371-02, Secondary Protector
Model 151, Faceplate Ground Adapter Screw
1. General
These installation instructions cover the description and installation of the Model
371 Protector Assembly. The Model 371 is designed to protect both the control
unit and the telephone sets of the SPIRIT™ Communications System from
foreign voltages caused by lightning, power contact, or power induction. Two (2)
Model 371 Protector Assemblies are installed whenever the station is outside of
the building but less than 1,000 feet from the SPIRIT™ system control unit
(Figure 1). The installation must follow requirements as outlined in Article 800-2
of the National Electric Code Handbook, and AT&T Standard Practice
#462-005-100. Other AT&T Practices that describe wiring for a non-fused protector
are identified in Section 6. (Section 6 also identifies how to order all of these
documents.)
The Model 371 Protector Assembly contains no field-serviceable components. If
the protector must be replaced, the presence of hazardous voltages must be
investigated before touching any exposed metallic parts.
Do not connect grounds to the following:
Gas pipe
–
–
Electric service branch circuit conduit
–
Armor of BX cable
–
Interior of any electrical box
WARNING: Hazardous voltages may be present.
SPIRIT™ CS IROB Installation
Figure 1
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