Overview
150-458-100-05
2
February 23, 2000
HRE-458 List 1, List 1B, and List 2
F
UNCTIONAL
D
ESCRIPTION
The following section discusses the function of each component on the HRE-458. The enclosure consists of an
aluminum card cage with a holding capacity for up to ten doubler units, a stainless steel composite baseplate, and
a stainless steel cover that maintains weathertight integrity and provides efficient heat exchange to expel the heat
generated within the units.
Gel-filled Stub Unit
The gel-filled cable stub on the List 1, List 1B unit (
) is equivalent to an ALP FTS-PIC filled core
telephone cable (refer to
for a complete description of the cable stub). The unit is intended for
aboveground applications. Standard color codes are used for pair identification with color compounds chosen for
electrical balance and permanency. An inner core jacket protects the core and provides improved mechanical and
electrical characteristics. The outer jacket consists of material that provides protective covering from sunlight,
atmospheric temperatures, ground chemicals, and stresses expected in standard installations.
The gel-filled List 1, List 1B unit is similar to the air-filled List 2 unit except that a breather vent valve on the List
1, List 1B replaces the internal pressure cutoff valve on List 2. The breather vent valve allows the circulation of
outside air through the List 1, List 1B enclosure when it is not pressurized. The enclosure must breathe to prevent
the buildup of excessive moisture and other damaging contaminants from occurring within the enclosure.
An optional pressure relief valve is included in the shipping kit for the List 1, List 1B unit. The kit comes in a
small plastic bag that is attached to the brown/white spare pair shrink tab. Use the pressure relief valve in place of
the breather vent valve to locally pressurize the List 1, List 1B unit. See
for conversion details.
Figure 1.
HRE-458 Gel-filled Remote Enclosure
The cable complies with the requirements of the American National Standards Institute
(ANSI) and the Insulated Cable Engineers Association (ICEA) S-84-608-1994 and REA
PE-89, respectively.
