Non-Electric Initiation Methods (NONEL)

Non-electric initiation systems (NONEL) have been used in the explosive industry for many years. Cap and fuse, the first method of non-electric initiation, provided a low cost, but hazard prone system. The cap and fuse system has declined in use with the introduction of more sophisticated, less dangerous methods. Truly accurate timing with cap and fuse is impossible. The cap and fuse system has no place in a modern construction industry and must not be used on USACE projects.

Some frequently used non-electric initiation systems are available: (1) Detonating Cords and Systems, (2) Delayed Primers, and (3) Shock Tube Initiation Systems. All are used in the construction industry. To increase the number of delays available, individuals often combine the use of more than one non-electric system on a blast. Often electric and non-electric system components are combined to give a larger selection of delays and specific delay times.