London School of Hygiene and Tropical Medicine, Tavistock Place

• Prepared the RAMS for a two man crew covering earth electrode installation, scaffold access, percussion tool use and the site's Covid procedures.
• Obtained the underground services drawing from the main contractor and swept every proposed electrode position with a calibrated CAT and Genny before driving. No electrode went in without the main contractor agreeing its final location.
• Drove the earth electrodes to an initial depth of 6 m using a 110 V hand held percussion hammer, sharing the work between operatives and logging trigger time to control hand arm vibration exposure.
• Connected the electrodes to the structural steel frame, so the frame and the earth work together as the building's path to ground, and provided the crane earth as a separate connection.
• Tested each electrode for earth resistance with a calibrated digital earth tester on completion and recorded the readings.

A tested crane earth and earth termination network installed to BS EN 62305 and BS 7430 on a constrained central London site, with the building's lightning protection system completed and tested to the specification.