If branch circuits are used when blasts are fired from power circuits, safety switches located at safe distances from the blast area shall be provided in addition to the main blasting switch.
Ariz. Admin. Code § R11-1-278
If branch circuits are used when blasts are fired from power circuits, safety switches located at safe distances from the blast area shall be provided in addition to the main blasting switch.
Ariz. Admin. Code § R11-1-278