completely treated for fungus resistance. Treating materials containing a
mercury bearing fungicide shall not be used. Treating materials shall not
increase the flammability of the material or surface being treated.
Treating materials shall cause no skin irritation or other injury to
personnel handling it during fabrication, transportation, operation, or
maintenance of the equipment, or during use of the finished items when used
for the purpose intended.
2.1.8
Tamper Provisions
2.1.8.1
Tamper Switches
Enclosures, cabinets, housings, boxes, and fittings having hinged doors or
removable covers and which contain circuits or connections of the system
and its power supplies, shall be provided with cover operated,
corrosion-resistant tamper switches, arranged to initiate an alarm signal
when the door or cover is moved. The enclosure and the tamper switch shall
function together and shall not allow direct line of sight to any internal
components before the switch activates. Tamper switches shall be
inaccessible until the switch is activated; have mounting hardware
concealed so that the location of the switch cannot be observed from the
exterior of the enclosure; be connected to circuits which are under
electrical supervision at all times, irrespective of the protection mode in
which the circuit is operating; shall be spring-loaded and held in the
closed position by the door or cover; and shall be wired so that the
circuit is broken when the door or cover is disturbed.
a. Nonsensor Enclosures:
Tamper switches must be installed on all
nonsensor enclosures.
b. Sensor Enclosures: Tamper switches must be installed on all sensor
enclosures or housings.
2.1.8.2
Enclosure Covers
Covers of pull and junction boxes provided to facilitate initial
installation of the system need not be provided with tamper switches if
they contain no splices or connections, but shall be protected by tack
welding or brazing the covers in place or by tamper resistant security
fasteners. Labels shall be affixed to such boxes indicating they contain
no connections.
2.1.9
Locks and Key-Lock Switches
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NOTE: Either round key or conventional key type
locks are acceptable for use in the system.
Selection should be based on hardware availability
at the time of design and the requirements for
matching locks currently in use at the site. If the
locks do not have to be matched to locks in use, and
the designer has no preference, all brackets may be
removed.
**************************************************************************
2.1.9.1
Locks
Locks shall be provided on system enclosures for maintenance purposes.
Locks shall be UL listed, [round-key type with 3 dual, 1 mushroom, 3 plain
SECTION 13720A
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