Use horizontal electrodes for installations near coastline or on an island. Salty seawater provides for low impedance grounding.
- Use bronze, copper, and stainless steel.
- To lower impedance, use two ground electrodes if possible.
- Use electrodes that are at least 2 … 3 m (6.6 … 10 ft) long.
- Route the ground electrodes from the grounding connector at the mast base to the most desirable direction towards the sea.
- Attach the electrodes to a fixed point if seas are rough or there is a risk of ice formation.
- Make sure the electrode remains submerged all the time, even during low tide and other sea level variations.
- Check the equipment regularly for corrosion. Even the slightest amount of leakage current flowing from the equipment to the ground causes the electrode to corrode very fast.
In freshwater, use a somewhat longer submerged electrode, 5 … 10 m (16 … 33 ft).