Final answer:
The Nonel assembly in blasting features a non-electric initiation system important for safety by preventing accidental detonations due to stray currents. It uses a shock tube and blasting cap for controlled explosions.
Step-by-step explanation:
An essential component of a Nonel assembly in blasting is the triggering mechanism for high explosives, especially in the mining and construction industries. Non-electric detonation systems, or "Nonel" systems for short, are essential for safety because they lower the possibility of an unintentional detonation caused by stray electrical currents. The assembly consists of a blasting cap and a shock tube. The reactive material inside the tube creates a shock wave that, when ignited, travels to the cap and starts the explosion. Compared to electric blasting caps, this system is very beneficial because it guarantees a precise and controlled detonation.