An Early Streamer Emitting (ESE) device is similar to a conventional lightning rod and attracts lightning. The system is an air terminal network, consisting of a blunt rod and a cylindrical body. It activates when there is a rise in the electric field.
The body comprises two components: the capacitator accumulates energy from the natural build-up of the electrical field and the triggered device safely releases the stored energy.
The system specifications of the air termination network comprise a Safe Strike S35 ESE unit, serial number MN18, installed to the main chimney. It is bonded directly to the steel work of the chimney, with standoff insulators and a standard stainless-steel bracket.
The Safe Strike ESE gives a 57-metre radius of protection. Down tape conductors utilise the metal chimney as the path to earth. Two cross bonds span from the Safe Strike elevation pole to the chimney’s steel work. The ESE is normally installed at the highest point of the structure, or at the centre.
The radius of protection is calculated in accordance with standard NF C 17-102. The calculations must be in line with the mathematical standards of BS EN 62305 (protection against lightning).
Test points comprise two A-clamps within the inspection pits and the earth termination comprises two 3.6mm x 16mm earth electrodes within the inspection pits. ESE devices must pass a number of tests including the marking test, dimension test, electric current tolerance test and effectiveness test.
The ESE is usually installed at the highest point or at the centre of the structure. To ensure comprehensive protection, the Radius of Protection (RP) must be calculated in accordance with standard NF C 17-102 and in line with the mathematical modelling used in BS EN 62305 (protection against lightning).
All ESE devices should pass the following tests:
- Marking test
- Dimension test
- Electric current tolerance test
Our ESE device is created in accordance with the French National Standard NF C 17-102 (protection against lightning – early streamer emission lightning protection).
The advantages of using Safe Strike ESE include:
- Low carbon footprint
- Cheaper installation and maintenance
Although you could consider using other early streamer emitting devices, such as the Helita Pulsar lightning protection system, we would always recommend installing the Safe Strike ESE device.
With any enquiries, please call 01158 752 686 or 07581 266 493. Alternatively you can email us at