Cable Laying Work

Cable Laying Work – Step-by-Step Process

Site Survey & Planning

• Assess route, load capacity, and environment (soil condition, obstructions).
• Choose cable type (LV, MV, HV; armoured or unarmoured).
• Determine method: underground, trenching, ducting, tray/trunking, or conduit.
• Identify clearance requirements (e.g., from gas/water lines).

Cable Laying Methods

a. Underground (Direct Burial)

• Excavate trench as per design (usually 750–1200mm deep).
• Lay a sand bed (100mm), install cables, cover with sand and warning tape.
• Backfill with soil and compact.

b. Duct/HDPE Pipe Laying

• Used for easier cable pulling and future replacement.
• Cables pulled or pushed through ducts using winches or rods.

c. Cable Tray/Trunking (Overground)

• Install trays on walls or supports.
• Lay cables neatly and secure with saddles or clamps.
• Allow for expansion and heat dissipation.

d. Conduit Laying (Indoor/Surface)

• For small-diameter control or lighting circuits.
• Use PVC or GI conduits for mechanical protection.

Cable Pulling & Installation

• Position cable drum properly (labelled end first).
• Use rollers to prevent cable dragging.
• Maintain minimum bending radius (as per cable specs).
• Avoid pulling tension beyond the rated limit.

Cable Termination & Jointing

• Strip insulation carefully.
• Fit lugs/glands and crimp using appropriate tools.
• Use heat-shrink or cold-shrink kits for HV/MV joints.