Ground Construction

Introduction

MPSV cables should be installed in a sand bed or concrete layer. For effective and efficient operation it is best to install a layer of insulation material below the cable. This will prevent heat being lost to the sub-soil. A suitable compression & moisture resistant polyurethane insulation is recommended.

Concrete

Cables can be laid and spaced using the ECO-FIX HD fixing band. The heating cable should be installed between two layers of concrete. Install the cable over the bottom layer using the ECO-FIX HD strip and then pour the top layer of concrete. The concrete mixture must not contain sharp stones as these may damage the cable.

Concrete Paviors

Care should be taken when installing under concrete paviors. To be effective the cables have to be installed close to the concrete pavior, typically in a 30mm layer of sand.

Asphalt

To protect the cables from the heat of the asphalt during installation, the cables should first be covered with a 30mm minimum layer of fine sand or a layer of concrete. The asphalt should be allowed to cool to 120 - 140oC before it is laid. It is not recommended that heavy duty rollers or laying machines are used in the laying of the asphalt due to the risk of damaging the cables.