PART 2
PRODUCTS
2.1
GENERAL REQUIREMENTS
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NOTE: Some sensors have special or optional
features that may be required for this project.
Refer to Technical Manual 5-853-4 for guidance on
applicability. Add descriptions of special or
optional features to this specification if they are
required.
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2.1.1
Materials and Equipment
Units of the same type of equipment shall be products of a single
manufacturer. All material and equipment shall be new and currently in
production. Each major component of equipment shall have the
manufacturer's model and serial number in a conspicuous place.
2.1.2
Enclosures
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NOTE: Show on the drawings which specific type of
enclosure is needed. Show metallic enclosures for
very high security areas or when a higher degree of
tamper protection is desirable.
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System enclosures shall be as shown.
2.1.2.1
Interior Sensor
Sensors to be used in an interior environment shall be housed in an
enclosure that provides protection against dust, falling dirt, and dripping
noncorrosive liquids.
2.1.2.2
Interior Electronics
System electronics to be used in an interior environment shall be housed in
enclosures which meet the requirements of NEMA 250 Type 12.
2.1.2.3
Exterior Electronics
System electronics to be used in an exterior environment shall be housed in
enclosures which meet the requirements of NEMA 250 Type 4X.
2.1.2.4
Corrosion Resistant
System electronics to be used in a corrosive environment as defined in NEMA
250 shall be housed in an enclosure which meet the requirements of NEMA 250
Type 4X.
2.1.2.5
Hazardous Environment Equipment
System electronics to be used in a hazardous environment shall be housed in
an enclosure which meets the requirements of paragraph Hazardous
Environment.
SECTION 13721A
Page 14
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