Underground cable protection

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16 March 2011 Interconnection

The Reslock is a South African-designed and patented electrical cable protection device which can be installed on any cable that has, or will be, installed in an extruded plastic ducting system underground, to prevent the theft or forced removal of the cable.

The Reslock was designed by Glenn Kotze who is an electrician by trade and was employed by the Durban Metro as a subcontractor for the past 15 years, where he was involved in replacing ‘forcibly removed cable’ for many years, which prompted the invention. He started with the design in 2004 and has taken six years to perfect what he describes as the ultimate in cable protection. The Reslock device is installed in line, at intervals of six metres of installed cable duct. This then becomes an integral part of the complete ducting system, allowing the cable to be pulled through the duct without any complications on installation.

The Reslock consists of two matching plastic moulded sections, 390 mm long, manufactured from 30% glass-filled nylon. The electrical cable is then secured on the internal surface of one of the sections, by means of a plastic clamp with a steel insert, which in turn is bolted through the plastic section with U bolts onto the steel backing plate with galvanised U bolts. All the steel parts supplied are manufactured in either 3CR12, stainless steel or galvanised mild steel, depending on the customer’s requirements.

The completed Reslock is held together and secured to the plastic ducted system by means of four stainless steel bandit straps, thus creating the completed, secured system. Up to four cables, 25 mm diameter, can be clamped in any one duct, as every second Reslock will then be the clamping unit. The system, due to its configuration, is water resistant once strapped together. The trench is then backfilled and compacted to a recognised compacting specification.

A video demonstrating the strength testing of the system is viewable at www.reslock.com.

For more information contact Garry Milford, Reslock, +27 (0)82 454 8750, [email protected], www.reslock.com

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