What is the difference between static electricity and dynamic discharge in munitions safety?

• A. Static discharge is dangerous only outdoors.
• B. Bonding and grounding are optional safety measures.
• C. Static electricity is buildup from friction; dynamic discharge occurs during touching or bridging; both can ignite energetic materials; bonding/grounding helps.
• D. Dynamic discharge cannot ignite energetic materials.

Answer: (C)

In munitions safety, you’re looking at how charges build up and how they release energy. Static electricity is the gradual buildup of electrical charge on surfaces caused by friction, contact and separation. Dynamic discharge is the sudden spark or arc that happens when a charged object comes into contact with or bridges to another conductor, allowing charge to jump quickly. Energetic materials can be ignited by either type of discharge if the energy is sufficient and a path exists near the material.

Bonding and grounding provide a safe path for charges to equalize with other conductors or the earth, preventing the differential voltages that lead to a discharge near energetic material. That’s why this concept emphasizes both how static and dynamic discharges occur and how bonding and grounding mitigate the risk.