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CTX28 Installation
CTX28 Secondary Protection
CTX28 Secondary Protection
The following diagram (see
outside wiring .
7255
Figure 1-18 CTX28 Secondary Protector Diagram
Important!
1-26
Figure
Building #1
GMAU
GSTU
GMAU
GCDU
GMAU
GDCU
(Earth Ground)
To protect against transient voltages and currents, solid state secondary protectors
must be installed if there is outside wiring. These protectors, which contain fast
semiconductors in addition to fuses, shall comply with the requirements for
secondary protectors for communication circuits, UL 497A. Care must be taken to
ensure that they are very well grounded to a reliable earth ground. Recommended
protectors are available in the fast Series 6 line from ONEAC Corp., Libertyville,
Illinois 60048, (800) 327-8801. Install and test the secondary protectors precisely to
the installation instructions of these manufacturer.
1-18) shows where secondary protectors must be installed for
Standard
Telephone
DDSS
Console
Digital Telephone
or Cordless Base
MDFB
Loop CO Line
Secondary protectors – standard voltage
Secondary protectors – low voltage
Building #2
HESB
Digital Telephone
DDCB
MDFB
Strata CTX28 I&M
3/05
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