2.6.1
Enclosure Covers
Covers of pull and junction boxes provided to facilitate installation of
the system need not be provided with tamper switches if they contain no
splices, connections, or power supplies, but shall be protected by tack
welding or brazing the covers in place. Zinc labels shall be affixed to
such boxes indicating they contain no connections. These labels shall not
indicate that the box is part of the security system.
2.6.2
Conduit-Enclosure Connections
All conduit-enclosure connections shall be protected by tack welding or
brazing the conduit to the enclosure. Tack welding or brazing shall be
done in addition to standard conduit-enclosure connection methods as
described in NFPA 70.
2.6.3
Locks and Key-Lock Switches
**************************************************************************
NOTE: Either round key or conventional key type
locks as defined in this specification are
acceptable. Selection should be based on hardware
availability at the time of design.
**************************************************************************
2.6.3.1
Locks
All locks required to be installed on system enclosures for maintenance
purposes shall be UL listed, [round-key type, with three dual, one
mushroom, and three plain pin tumblers] [or] [conventional key type lock
having a combination of five cylinder pin and five-point three position
side bar]. Keys shall be stamped "U.S. GOVT. DO NOT DUP." The locks shall
be so arranged that the key can only be withdrawn when in the locked
position. All maintenance locks shall be keyed alike and only two keys
shall be furnished for all of these locks.
2.6.3.2
Key-Lock-Operated Switches
All key-lock-operated switches required to be installed on system
components shall be UL listed, [round-key type, with three dual, one
mushroom, and three plain pin tumblers] [or] [conventional key type lock
having a combination of five cylinder pin and five-point three position
side bar]. Keys shall be stamped "U.S. GOVT. DO NOT DUP."
Key-lock-operated switches shall be two position, with the key removable in
either position. All key-lock-operated switches shall be keyed differently
and only two keys shall be furnished for each key-lock-operated-switch.
PART 3
EXECUTION
3.1
INSTALLATION
System components and appurtenances shall be installed in accordance with
the manufacturer's instructions and as shown. All necessary
interconnections, services, and adjustments required for a complete and
operable data transmission system shall be provided. Loading coils shall
not be installed on cables provided for use with line drivers.
SECTION 16792A
Page 14
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