Heat Tracing Cable Storage and Handling on Site

Most heat tracing cable damage happens before installation: on a truck, in a storage container, or dragged across a site. The cable looks fine afterwards, and the damage only shows up as low output months later. These are the storage and handling rules that prevent it.

Storage

Temperature

Store cable above its minimum installation temperature. Self-regulating cable becomes stiff in cold weather; bending it when cold can crack the insulation or damage the PTC core. Keep cable indoors or in a heated container until it is needed.

Moisture

Terminations and junction boxes are moisture-sensitive: keep them in their original packaging until use. Cable reels stored outdoors should be raised off the ground and covered.

UV and mechanical protection

Long outdoor storage exposes the jacket to UV. Keep reels covered, and do not stack heavy items on them.

Handling

Do not drag

Dragging a reel across concrete, scaffolding or frozen ground damages the jacket. Use reels on stands and two people for long pulls.

Bend radius

Respect the minimum bend radius, especially at low temperature. A sharp bend on a cold cable is the most common cause of a broken core that only appears later.

Cutting

Cut self-regulating cable with a proper tool and seal the end immediately. An unsealed end absorbs moisture and causes an earth fault.

Unrolling

Unroll from the reel without twisting. A twisted cable sits unevenly on the pipe and can be damaged by insulation work.

Site checks after handling

What to do if damage is found

Do not simply tape over a damaged jacket. Test insulation resistance, cut out the damaged section and re-terminate. A taped-over damage point will fail in the first winter with moisture.

Planning avoids most problems

Order cable to arrive close to installation time, store it indoors, and plan the pull before the insulation work starts. The cheapest protection is not leaving cable on site for weeks.

Topic hub: Installation, Commissioning and Maintenance