AN Wallis and Co Ltd

Wallis copperbond earth rods offer installers the most economical method of achieving a low earth resistance. Each rod has a high tensile strength, low carbon steel core. 99.95% pure copper is applied electrolytically and forms a metallurgical bond between the steel core and the copper. This combination makes the rod ideal for deep driving whilst also provides lasting resistance to corrosion. The threads are formed by a cold rolling process which ensures strength and maintains the molecularly bonded copper covering along the full length of the threads. Cold-rolled threads are strength than cut-threads. The standard copper thickness is 0.25mm. Greater copper thicknesses are also available.

The phosphor bronze coupling dowel is used for joining solid copper earth rods together.

These driving spikes enable solid copper earth rods to be driven easily into the ground.

The Wallis market leading range of earth rod seals are simply the best available in the industry offering 4 variations with very few components, extremely robust and simple to install. Office blocks in the modern city are frequently adjoined therefore requiring earth rods to be located within the building footprint. In such cases earth rods are usually installed in the basement or underground car park, which requires the earth rod to pass through the buildings blinding slab and water proof membrane. To prevent water ingression a seal to the earth rod and membrane is required. The Wallis earth rod seals are purpose designed to meet this need. They are extremely robust offering heavy duty sealing on an industrial scale.

These clamps are used for joining earth rods to different sizes of stranded copper conductor. The clamps have a high resistance to corrosion and are mechanically strong to ensure a lasting connection.

These clamps are used for joining earth rods to different sizes of copper tape. The clamps have a high resistance to corrosion and are mechanically strong to ensure a lasting connection.

This Wallis clamp is used for connecting flat tape to solid circular conductor, for example where the lightning protection system has been designed in 8mm copper conductor but the connection to the earth rod is made using 25 x 3mm copper tape. It will also serve for making through joints and tee connections in 8mm solid circular conductor.

Wallis Low Res provides a permanent simple solution to substantially lower the resistance of an earthing system. It is a high performance low-resistance earthing compound which when mixed with cement and water forms a high strength electrically conductive concrete to last for the life of the system. Low Res is supplied in a fine granular form available in 25kg. It is widely used in earthing and grounding applications where permanent low resistance and high compressive strength solutions are required. By mixing Low Res with cement at a ratio of 2:1 the resulting concrete is electrically conductive whilst offering a solid electrical connection between the earthing system and the ground. Low Res is a non leaching, maintenance free stable earthing compound ideal for use in ground conditions where conductivity is very poor such as rock or shale. Low Res provides a permanent path for excellent conduction of current instead of attempting to employ large diameter difficult to drive earth rods. Low Res applications include static control for aircraft aprons and fuel tankers, RF and microwave screening and earthing for a wide variety of applications in Oil and Gas installations, Telecommunications industry, Defence Establishments, Rail and Underground installations, Electricity and Water Companies.

Solid copper plates provide a long lasting earthing solution in places where driving earth rods might be impractical. They are often installed in conjunction with Low-Resistance Earthing Compound or Bentonite.

These earth rods are designed for use where extremely high corrosion resistance and exceptionally long life are required. Solid copper earth rods are produced from solid copper bar and are internally threaded for jointing. When deep driving a solid copper earth rod the usual practice is to insert the rod into a bore hole and backfill with either Low-Resistance Earthing Compound or Bentonite.