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2
EMPLOYER
Energy Sources and Sample Control Methods
ENERGY SOURCE
AND EXAMPLES
REGULATION SAMPLE CONTROL METHODS
Electrical
Power cords
Motors
O.Reg 851
s. 42.2, 76
Turn off power to machine at main disconnect
Attach lockout device
Discharge capacitors (if required)
Pneumatic
Pressurized
air cylinders
O.Reg 851
s. 75, 76
Shut off supply lines
Attach lockout device
Release residual energy
Thermal
Heater units
Steam lines
O.Reg 851
s. 75, 76
Shut off supply lines, energy source
Attach lockout device
Allow time for system to return to a safe room temperature
Release residual energy (liquids or gasses)
Kinetic
Motor blades
Flywheels
O.Reg 851
s. 75, 76
Ensure motion has stopped
Block or secure energy source to prevent movement
Gravity/Potential
Springs
Presses
O.Reg 851
s. 74, 75
Lower load to rest position, if possible
Block parts to prevent it from falling, or springs releasing
Hydraulic
Presses
Cylinders
O.Reg 851
s. 74, 75
Shut off supply valves
Attach lockout device
Release any residual energy (bleed off lines)
Radiation
Lasers
Microwave
X-ray
O.Reg 851
s. 75, 76
Turn off energy source
Attach lockout device
Chemicals
Flammable liquids
Corrosive liquids
O.Reg 851
s. 75, 76, 78
Turn off chemical supply valves
Attach lockout device
Let system cool to a safe room temperature
Drain residual chemicals in a safe way
