5 INSTALLATION
Pulling the Cable into Position
For ease of installation, it is recommended that the cables
be completely uncoiled, or removed from the reel, and laid
out in a straight run with the end to be pulled closest to
the entry point into the support system (cable tray, trapeze,
etc.). Attach the pulling rope to the end of the cable as
described in Section 4.4.
Pull the cable by hand throughout the desired routing. Use
personnel to guide the cable around corners using large
sweeping hand-formed bends. Do not bend the cable to
a radius smaller than the minimum pulling radius shown
in Table 2 while pulling the cable into position. When
changing direction from a horizontal to vertical pull, use
sheaves or pulleys to guide the cable around the bend. The
cable can be neatly arranged in the tray / trapeze once it
has been completely pulled into position.
If installing a cable with a factory termination on one end
only, and if space permits, it is recommended that the
cable pull begin at the equipment, such as a valve actuator,
and that the cable be pulled from the unterminated end.
This will reduce the possibility of damage to the terminated
end.
Table 2: Minimum Pulling Radius
Cable O.D. (outside diameter)
0.75 in (19 mm) and smaller
12 times cable diameter
Larger than 0.75 in (19 mm)
24 times cable diameter
Multiconductor Cable
Multiconductor cables are typically used in industrial wiring
applications. Cables can be connected to any junction box,
valve actuator, or equipment approved for the area
classification. Refer to Sections 5.2, 5.3 and 5.4, pages 23
to 29, for further details on connecting MI multiconductor
cables to junction boxes and other equipment, and be sure
to follow the applicable requirements of the NEC / CEC, or
other national electrical codes and standards.
Twisted Pair Fire Alarm and Communication Cable
Twisted pair cable is installed in the same manner as
multiconductor cables. When installing circuits requiring
twisted pair cables, ensure that the cable parameters are
compatible with the equipment.
18 | nVent.com
Summary of Contents for pyrotenax Alloy 825
Page 1: ...MI Cable Industrial Wiring Installation Manual For Alloy 825 Sheath Cables ...
Page 4: ...iv nVent com ...
Page 46: ...42 nVent com ...
Page 47: ...nVent com 43 ...