Grounding lightning, electrical hazards

I-3.6.2 Electronic control, monitoring, and hydrogen gas measurement equipment shall be properly grounded and isolated from piping to help prevent overpressure/ accidental shutoff situations caused by equipment failure due to lightning strikes and electrical transients and to prevent safety hazards caused by fault currents. Electrical isolation equipment for corrosion control purposes should not be installed in buildings unless specifically designed to be used in combustible atmospheres. 

If electric detonators are obtained without a device for shorting the metal case to the lead wires, they are to be removed from their con tainers and immediately wrapped with aluminum foil. Personnel, equipment, and the detonator itself must be grounded during the handling of items whose lead wires are not shorted to each other or to the metal case RF Energy, Weapons and Lightning Hazards... 

Also in the past 10 years or so sophisticated lightning locating equipment has been installed throughout the world. For example, all ground flashes in the U.S. are now centrally monitored for research, for better overall weather prediction, and for hazard warning for aviation, electric utilities and other lightning-sensitive facilities. 

Conductive surfaces In some applications, it will be required to ensine electrical grounding of the composite structure (or parts of it), or to shield the space inside the structure or the structure itself from electromagnetic hazards (e.g. coming from lightning strike cinrents). In these cases, an electrically conductive surface can be obtained by applying a pre-impregnated metallic ply or, alternatively, a dry metallic ply plus a sinface film. Thermally conductive surfaces can be obtained in a similar manner if required. For such metal plies, typical materials are aluminium or copper, but commercially available products can be made from virtually any metal. Metal plies come in different forms, such as meshes, perforated foils and expanded foils. 

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