Testing of your Lightning Protection System is a requirement under the Electricity at Work Regulations 1989; testing is required to ensure that your system is fit for purpose and working correctly. The testing is carried out to the procedure outlined in BS EN 62305:2006, which is the British Standard for Lightning Protection Systems.
The Lightning Protection System should be inspected at a maximum interval of 12 months, however it is recommended that testing is carried out at 11 month intervals; this means that over a 12 year period, your Lightning Protection system is tested in every month, allowing for seasonal changes in soil resistivity.
If any faults are discovered whilst carrying out the inspection and testing, the faults will be photographed and documented, and if you require it, we will provide a quotation for their rectification.
Testing of the Lightning Protection System should comprise:
- Performing random continuity tests, especially continuity of those parts of the Lightning Protection System which were not visible for inspection during the initial installation and are not subsequently available for visual inspection.
- Conducting earth resistance tests of the earth termination system. The following isolated and combined earth measurements and checks should be made and the results recorded in a Lightning Protection System report:
- The resistance to earth of each local earth electrode and, where practical, the resistance to earth of the complete earth termination system. Each local earth electrode should be measured in isolation with the test point between the down conductor and earth electrode in the disconnection position. If the resistance to earth of the earth termination system as a whole exceeds 10ohms, additional electrodes should be installed, where practicable, to obtain the requisite resistance value. If there is a significant increase in the value of the earth resistance from previously measured values, additional investigations should be made to determine the reason for the increase and measures taken to improve the situation.
- The results of a visual check of all conductors, bonds and joints or their measured electrical continuity.