By far the largest and most important component of any structural lightning protection or earthing system is the actual conductor.
The conductor network is the means of intercepting/carrying the current of a lightning strike safely to the earth termination network. Use the guidelines of BS EN 62305-1 & 3 for the correct placement of conductors.
Selection of the correct conductor type for the installation is highly important, and is likely to be the initial consideration of a lightning protection or earthing system designer.
A comprehensive range of Furse copper and aluminium conductors is available in each of the main globally recognised standard formats, i.e. flat tape, solid circular and stranded. Additionally each format is available in a variety of conductor sizes, to meet differing lightning protection and earthing requirements.
Specification will depend on whether the application is for an above ground structural lightning protection system, or a below ground earthing installation.
Conductors for structural lightning protection systems
Furse lightning protection conductors are available in copper and aluminium, and are supplied bare or with PVC coating. For most installations, copper is specified due to its high conductivity and anticorrosive properties.
The following sizes are suitable for the majority of above ground lightning protection systems:
Flat tape conductor
25 x 3 mm bare tape, or 25 x 3mm PVC covered tape
Solid circular conductor
8 mm diameter bare or PVC covered solid circular conductor
70 mm2 bare or PVC covered stranded conductor