185.Making secure: Subject to the provisions of section 186, before undertaking any maintenance, repair or unjamming work in a machine’s danger zone, the following safety precautions shall be taken:
(1) turn the machine’s power supply switch to the off position;
(2) bring the machine to a complete stop;
(3) each person exposed to danger locks off all the machine’s sources of energy in order to avoid any accidental start-up of the machine for the duration of the work.