A Right Angle Boot is a moulded insulating cover designed to protect the connection point where a cable’s conductor joins equipment such as transformers, switchgear, motors, or bushings — especially when the cable approaches at a 90-degree angle.

Its primary functions are:

• Electrical insulation of exposed conductive parts
• Environmental sealing against moisture, dust, and contaminants
• Mechanical protection against abrasion and accidental impact
• Stress relief to prevent bending forces from damaging the cable or lug

When made from rubber moulded material, it offers excellent flexibility, toughness, and long-lasting resistance to electrical and environmental stresses.

Construction and Material

Right Angle Boots are generally made from high-quality EPDM (Ethylene Propylene Diene Monomer) rubber or silicone rubber. Key properties include:

• High dielectric strength to withstand operating voltages
• Excellent elasticity to accommodate movement and vibration
• Resistance to UV radiation, ozone, and weathering (especially important for outdoor use)
• Thermal stability across a wide temperature range (typically –40°C to +120°C or higher)
• Good chemical resistance against oils, greases, and industrial pollutants
• Hydrophobic properties, reducing water tracking risk

Some versions are also available with semi-conductive layers or graded insulation for even better control of electrical fields at high voltages.

Applications in Termination Kits

• Used for terminations at equipment bushings, where space constraints demand a compact, angled solution
• Ideal for indoor and outdoor terminations on transformers, switchgear, motors, and junction boxes
• Frequently specified where phase-to-phase or phase-to-ground clearances are limited
• Especially important in high-voltage (11kV, 22kV, 33kV, and above) terminations where flashover risks are higher