With use of non-electric blasting caps and fuses, the main cap is installed on the end of the main fuse and then crimped. All of it is exposed.

At the explosive end of the main ring branches the blasting cap is properly installed in a threaded cap well in the explosive block and a priming adapter is slid over the wires for an electric cap or the fuse of a non-electric cap and screwed into the threaded well. This covers the end of the blasting cap completely.

Yes.

In MOST places, if the grenade fuse has not been fired, possession requires permits/ licenses. The end of the fuse that fits inside the grenade is a form of blasting cap. Like blasting caps, those can be rather dangerous, and cause injury. If the fuse has been fired, it is an inert bit of metal. Of course, do not take it to school, on an airplane, courthouse, post office, or other governemnt property. If you are not sure, turn it over to law enforcement for safe disposal.

Dynamite is more stable than plain nitroglycerin, but it still must be handled with care.

Military demolitions tend to be VERY stable, until primed with a blasting cap.

In the construction trade, bus wire is used for the feeders that connect the two wires on a blasting cap to the power supply. The other end of the bus wire is connected to the hand generator that is used for a power supply to energize the blasting cap.