To ensure it remains permissible, what is required for firing a permissible explosive?

The requirement for firing a permissible explosive is that it must be done using an electric detonator of proper strength. This is crucial because permissible explosives are designed to be used in environments where there is a risk of gas or dust explosions, particularly in underground mining operations. The use of an electric detonator ensures reliable initiation of the explosive while minimizing the risk of inadvertently igniting any hazardous materials present in the environment.

Electric detonators provide precision and control over the timing of the explosive, which is vital for safety in potentially volatile situations. They are specifically engineered to be compatible with permissible explosives, adhering to safety standards that are critical in preventing unintentional detonations or hazards that could arise from improper ignition methods.

Other options, such as using a manual detonator or a fuse, may not meet the safety requirements established for permissible explosives. In particular, the reliance on non-electric methods could introduce risks of accidental ignition from stray currents or other electrical influences, making them unsuitable for use with permissible explosives in sensitive settings.