Section 43.89. Loading and drilling

(a) Detonators shall be inserted in the explosives only as required for each round of blasting. Detonators shall not be inserted in the explosive without first making a hole in the cartridge with a sharpened stick. No holes shall be loaded except those to be fired at the next round of blasting. All explosives remaining after loading a round shall be removed from the caisson before any wires are connected. Blasters shall use only hard wood rods for tamping and they shall not tamp or load any hole with a metal bar, nor shall the wooden rod have any metal parts.

(b) All lights used when loading shall be of an enclosed type. If electric flash lamps are used, they shall be constructed so that it is not possible to obtain a difference of potential between any two points on the outside of the lamp casing.

(c) Drilling shall not be started until all remaining butts of old holes are examined for unexploded charges.