1.A.7.Equipment and devices, specially designed to initiate charges and devices containing "energetic materials", by electrical means, as follows:

Technical Note
For the purposes of 1.A.7., the word initiator or igniter is sometimes used in place of the word detonator.
a. Explosive detonator firing sets designed to drive explosive detonators specified in 1.A.7.b.;
b. Electrically driven explosive detonators as follows:
1. Exploding Bridge (EB);
2. Exploding Bridge Wire (EBW);
3. Slapper;
4. Exploding Foil Initiators (EFI).
Technical Note
For the purposes of 1.A.7.b., the detonators of concern all utilise a small electrical conductor (bridge, bridge wire, or foil) that explosively vaporises when a fast, high-current electrical pulse is passed through it. In non-slapper types, the exploding conductor starts a chemical detonation in a contacting high explosive material such as PETN (pentaerythritoltetranitrate). In slapper detonators, the explosive vaporisation of the electrical conductor drives a flyer or slapper across a gap, and the impact of the slapper on an explosive starts a chemical detonation. The slapper in some designs is driven by magnetic force. The term exploding foil detonator may refer to either an EB or a slapper-type detonator.
N.B. For equipment and devices specially designed for military use, see the Munitions List.