EDCO TECHNICAL BULLETIN 2017

SURGE PROTECTING  SCHOOL INTERCOM SYSTEMS


THE PURPOSE OF THIS BULLETIN IS TO ASSIST USERS/INSTALLERS TO ACCOMPLISH THE FOLLOWING:

bulletSelect the correct suppressors for the application (i.e., inside building, outside building lines).
bulletProper suppressor system installation and wiring.
bulletAssurance of adequate grounding practice.

Figure 1

STRANDED WIRING USING TBLK ASSEMBLY



Comments on Figure 1

1. Bridging clips will be required on TBLK when using the OPX Series Suppressors.
2. Cable bundles to classrooms must be kept separate from cable bundles to equipment cabinet.
3. Cable bundles to classrooms must terminate on ground rail side of TBLK.
4. The TBLK can accomodate up to 25 suppressors (any combination of the above example part numbers).
5. For more detail on proper grounding, refer to Tech Bulletin #1090.
6. For best results, protect all conductors entering or leaving equipment cabinet.
7. Multiple TBLK's can be mounted in termination cabinet.
8. COHP-50 can be used up to a total load of 7 Watts per pair. For loads above 7 Watts, refer to the P264 Series DataSheet. The COHP-050(FS) is rated as a UL 497 Primary Protector.

Figure 2

SOLID 22 GA WIRING USING M1-50 PUNCHDOWN BLOCK




Comments on Figure 2

1. Bridging clips may be required on M1-50 when using the OPX Series Suppressors.
2. Cable bundles to classrooms must be kept separate from cable bundles to equipment cabinet.
3. Cable bundles to classrooms must terminate on ground rail side of M1-50.
4. The M1-50 can accomodate up to 25 suppressors (any combination of the above example part numbers).
5. For more detail on proper grounding, refer to Tech Bulletin #1090.
6. For best results, protect all conductors entering or leaving equipment cabinet.
7. Multiple M1-50 blocks can be mounted in termination cabinet.
8. COHP-50 can he used up to a total load of 7 Watts per pair. For loads above 7 Watts, refer to the P264 Series Data Sheet



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