150-454-111-06
Overview
HRE-454
February 25, 2000
5
Figure 2.
HRE-454 Gel-filled Remote Enclosure
Air-filled Stub Units
The air-filled, screened, 28-pair, 24 AWG cable stub on the air-filled unit (
) is equivalent to an
ALP FTS-PIC air-filled telephone cable. The unit comes with three metal valves: an air-pressure cutoff valve, a
Schrader air stem valve, and a pressure relief valve. The air cutoff valve is used to shut off the inlet air supply that
is pumped from the main feeder cable through the 30-foot (9.144 M) stub into the HRE-454 enclosure. The cable
stub is intended for buried, aerial, and duct applications. Standard color codes are used for pair identification. A
jacket protects the core and provides improved mechanical and electrical characteristics. The outer jacket provides
a flexible protective covering that withstands exposure to sunlight, atmospheric temperatures, ground chemicals,
and stresses expected in standard installations. The outside diameter of the cable is 0.64 inches (16.25 mm). Refer
to
for a complete description of the cable stub.
The HRE-454 cable sealing, O-ring, and V-Band seal have been safety tested to 36 pounds per square inch (PSI).
Most cables become ruptured or damaged at this pressure level. However, the HRE-454 cable sealing is designed
to handle this amount of pressure.
The common pressure supplied through the cable is approximately 9 PSI. This is sufficient to prevent water from
entering the cable or housing. ADC recommends pressurizing the enclosure to a maximum of 12 PSI.
The cable complies with the requirements of ANSI/ICEA S-85-625-1996 and REA PE-22.
Avoid using pressures above 36 PSI. Such pressures could force the V-Band away from the
flange and, in effect, impel the dome away from the housing. This could cause damage or injury.
