ADC 150-2257-01, User Manual

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Overview 150-712-200-02
2 July 26, 2000 HRE-712 List 1 and List 2
HRE-712 List 1 Gel-Filled Stub
The gel-filled cable stub on the HRE-712 List 1, shown in Figure 1 , is equivalent to an ALP FTS-PIC, filled-core
telephone cable. Table 2 on page 24 provides a description of the cable stub. The enclosure 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 HRE-712 List 1 enclosure is equipped with three metal valves installed in the base section, shown in Figure 1 .
The breather-vent assembly allows the circulation of outside air through the HRE-712 List 1 enclosure when it is
not pressurized. The enclosure must breathe to prevent excess moisture and other damaging contaminants from
accumulating within the enclosure.
An optional external pressure-relief valve is included in the shipping kit for the HRE-712 List 1. Use the valve in
place of the breather-vent assembly when sealing the enclosure for underground applications, or when locally
pressurizing the HRE-712 List 1.
The combined Schrader air-stem and External Air Intake T-valve, shown in Figure 1 , has both a Schrader air valve
and an air intake port that accepts a tube for connection to an external air source. In addition, the Schrader valve
can relieve the internal pressure of the dome when using an external air source. The external source must be able
to be turned off upstream from the air intake port.
“HRE-712 List 1 Vented-to-Pressurized Conversion Procedure” on page 22 provides instructions on converting
the enclosure to a pressurized enclosure. The Pressure Cutoff valve allows the external source of air to be cut off
when the cover is to be removed.
Figure 1. HRE-712 List 1 Remote Gel-Filled Enclosure
The gel-filled cable complies with the requirements of ANSI/ICEA S-84-608-1994 and REA
PE-89.
Grounding lug
Cable stub entry
Pivot bracket
Order wire connection
Breather vent valve or
optional pressure relief valve
V-Band T-handle
Pressure Cutoff valve
Schrader Air stem/Air intake T-valve
Bottom View
(to pressure
supply)
Pressure supply
connection
(1/2"/24 thread)
Air intake
Air stem