Question
Why should soldered joints not be used in lightning protection ground connections?
Answer Options
- A) A soldered joint will likely be destroyed by the heat of a lightning strike
- B) Solder flux will prevent a low conductivity connection
- C) Solder has too high a dielectric constant to provide adequate lightning protection
- D) All these choices are correct
Correct Answer: A
Explanation
A direct lightning strike carries an enormous amount of energy and current. Ground connections for lightning protection are intended to handle this instantaneous high current load. Connections must be robust, reliable, and have a high melting point.
Solder, which has a relatively low melting point, is unsuitable because a soldered joint will likely be destroyed by the heat of a lightning strike as the massive current melts the solder. Lightning ground connections should instead be made using mechanical connections (such as clamps or proper exothermic welds) that can withstand the intense heat and force.
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