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5 INSTALLATION
Once the cables have been pulled into position, secure
cables to the channel with steel or stainless steel single
bolt pipe clamps sized to correspond with the outside
diameter of the cable or cable bundle. This ensures a
neat installation, prevents movement of the cables, and is
particularly important in the case of vertical runs of cable
as it prevents the top section of cable from supporting the
weight of the entire vertical cable run.
For further information on this installation method, contact
nVent Technical Support, see Section 1.1.
Support spacing per NEC/CEC,
other national electrical codes
and standards
or customer
specification
Multiconductor
MI cable
Figure 13: Typical installation using trapeze support
5.2 Connection to Junction Boxes and Other
Equipment
Locating junction boxes below grade or too low to the
ground may allow moisture to enter the junction box,
resulting in cable failure. All junction boxes must be
mounted above grade level.
All cable or conduit leading to junction boxes must be
installed so that water does not enter the box. Avoid
entering the junction box from the top as this may allow
water to enter. Take appropriate measures to ensure that
moisture does not collect in the bottom of the junction box.
Steel rods securely
anchored to fire-rated
structure
Stainless steel
banding/gear clamp
every 2 ft (610 mm)
Single
between supports
conductor
MI cable
Steel pipe/
conduit
clamp
with
fasteners
Steel or
stainless
steel channel
Steel or
stainless steel
washers and
nuts
nVent.com | 23
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