MARMON VITALink MC, Руководство по установке

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to the pull rope and/or the conductor in order to
prevent relative movement of the conductors
and armor. Utilize supplementary pulling lines
with luffing grips as applicable. The cable
should be pulled straight off the reel. Use light
back pressure on the cable reel to avoid
reverse bending or overrunning as the cable
leaves the reel. Back pressure can be applied
by a reel brake or by wedging a two-by-four
against the flanges of the reel. Maintain a slow
but steady speed of up to 20 to 25 feet per
minute, avoiding stops and starts as much as
possible. Adjust the pulling speed to eliminate
galloping (surging), if necessary.
When pulling around a bend, use as large a
radius as possible, if necessary, hand feed to
keep long smooth curves. Sheaves or other
guiding devices can be used provided the
bends are not too severe. For difficult pulls
involving several bends or changes in elevation,
a jacketed cable is recommended for additional
mechanical protection.
Lubricants
When cables are laid in trays, pulled over
rollers and sheaves, or directly buried, lubrica-
tion is not required. When cables are pulled in
contact with a stationary surface, friction at
these points will cause an increase in the
tension required to install the cable. Therefore,
for these cases, lubrication is recommended.
For additional information, contact the RSCC
Engineering Department.
Electrical Circuit Integrity System
Electrical Circuit Integrity Systems consist of
components and materials that are intended for
installation as protection for specific electrical
wiring sys
t
ems, with respect to the disruption of
electrical circuit integrity upon exterior fire expo-
sure. The specifications for the protective sys-
tem and its assembly are important details in
the development of the ratings.
These protective systems are evaluated by
the fire ex posure and water hose stream test
as described in UL 2196 / ULC S139. Ratings
apply only to the entire protective system
assembly. Individual components and materials
are designated for use in a specific system(s)
for which corresponding ratings have been
developed and are not intended to be inter-
changed between systems. Ratings are not
assigned to individual system components or
materials.
Authorities having jurisdiction should be con-
sulted in all cases as to the specific require-
ments covering the installation and use of these
Classified systems.
The following instructions are for the VITALink®
MC® MC UL/ULC System 120, a 2 hour fire
rated cable system. This cable is only rated at
600 volts (conductor to conductor) when used
for 2 hour fire resistive cables. The 1 hour splice
is only rated at 480 volts (conductor to conductor)
when used as a 1 hour fire resistive system.
The following instructions are for the VITALink®
MC ULC S139 FHIT7 System 120 a 2 hour fire
rated system. This cable is rated at 600 volts
(conductor to conductor) when used for a 2
hour fire resistive cable.
These requirements must be followed to main-
tain the hourly rating in the fire area.
Open Runs/Installation of
Cable in Free Air
Supports and hardware shall be per System
120 requirements and as described herein.
Exception, in a non fire rated areas, support
spacing may be per the NEC/CEC.
Per the NEC/CEC, a minimum of 1/4 inch
clearance should be provided at the points of
support between the back of the cable and
the wall of supporting surface for metal clad
cables used in wet areas. Use of strut fulfills
this requirement.
It is important to use the Kindorf
®†
J-800 Series
interlocking straps and J-851 locking brackets
for jacketed cable in a fire rated area. A single
bolt type pipe clamp can become loose in a fire
once the jacket burns off, and if on a wall, the
pipe clamps can become loose and cables may
slip off the support.