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figure 4 : minimum bending radius of mi heating cables
Cable ∆ > 6 mm
Do not repeatedly bend and straighten the cable.
Keep heating cable strung loosely but close to the pipe being
traced, to avoid interference with supports and other equipment.
add additional heating cable to trace the fittings and supports as
required by the design specification or engineering documents.
Leave the appropriate amount of heating cable at all power
connection, splice and tee locations.
Do not bend the cable within 150 mm of the hot to cold junction
or remote terminations.
When installing MI and other constant wattage heating cables,
ensure that they do not overlap or cross. Doing so may lead to
local over-heating and hazard of fire.
figure 5 : minimal spacing must be respected
Minimum cable spacing: 25 mm (lower spacings may be possible but
require special attention and must be properly documented in the
engineering documentation).
for installation in hazardous areas, the standard minimum spacing is
50 mm. This must be respected, unless lower spacings are specifically
allowed in the engineering documentation.
6 x ∆
11
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