Each connector block allows up to eight outgoing shock tubes to be initiated. The free end of the shock tube is closed with a waterproof seal and fitted with a plastic J clip for use with detonating cord.
SC detonators are designed to be used in conjunction with millisecond in-hole detonators
SC detonators are designed as a surface (inter-hole/inter-row) relay system, which enables an unlimited number of blastholes to be fired in sequence.
SC detonators are commonly used in conjunction with a delay detonator in every blasthole. The normal practice is for all the inhole detonators to have the same delay period and, as a result, the SC surface detonators control the firing sequence.