Cable Knowledge

Cable Installation: Bending Radius, Pulling and Storage

Many cable failures begin during transport or installation. Drum handling, bend radius, pulling tension, sidewall pressure, temperature and end sealing should be controlled using manufacturer data and an installation plan.

Drum Storage

Store drums upright on firm ground, chock them and protect cable ends. Avoid uncontrolled rolling, flange damage and prolonged standing water.

Route Preparation

Inspect conduits, rollers, bends and tray edges. Calculate pulling tension and sidewall pressure for long or complex routes. Use suitable pulling eyes, stockings and lubricant.

Temperature and Bend Radius

Cold cable can be less flexible. Follow the minimum installation temperature and bending radius for the actual construction, especially armoured or screened cable.

Post-Installation Checks

Inspect the sheath, verify phasing and identification, complete specified electrical tests and seal entries. Record installed drum numbers and route data for maintenance.

Plan the Hardest Bend Before Pulling

The final bend near switchgear often controls pulling tension, sidewall pressure and minimum radius. Model the complete route and terminal approach instead of checking only the long straight section.

Position rollers before the pull begins.
Monitor pulling force where required.
Inspect and test after installation.

Information to Confirm

Drum dimensions and unloading equipment
Cable weight and route geometry
Minimum bend radius
Maximum pulling tension and sidewall pressure
Installation temperature
Post-installation test procedure

Engineering note: Use the cable manufacturer's installation limits and the project's approved method statement.

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