230Use of detonating cord

230 Use of detonating cord (1) This section applies if a shot-firer uses detonating cord in a blasting (a) if the detonating cord is used as a down line, the cord is— (i) secured tautly and extends by at least 600mm from the edge of the blast hole; and (ii) cut from the reel; and (b) excessive slack is not left in the branch line connections; and (c) the branch line connections are made in accordance with AS 2187.2; and (d) if both trunk and branch lines are used—the blast is initiated in a trunk line.

branch line means a length of detonating cord running between, and connected to, the trunk line and the primer. down line means a line of detonating cord, used to initiate an explosive charge, by which a primer is lowered into a blast hole. trunk line means the main line of detonating cord on the surface.