4. Releasing the potential energy in capacitors can be accomplished by _____.a. releasing pressure
b. grounding them
c. releasing tension
d. completely stopping the moving parts6.5 Energy-Isolation Devices
Energy-isolating devices prevent energy from being transmitted from an energy source to equipment.
Energy-isolating devices are the primary means for protecting those who service equipment. Examples
of energy-isolation devices include:
- manually operated electrical circuit breakers;
- main disconnect switches;
- line valves; and
- blocks.
Control Circuit Devices
Control circuit devices such as start/stop push buttons, e-stops, selector switches, presence sensing
devices, or limiting switches do not physically isolate equipment from the equipment's energy source.
For this reason, OSHA 1910.147 explicitly rejects control circuitry in the definition of an energy-isolating
device.
However, under the "minor servicing" exception provided in 1910.147(a) (2)(ii), circuitry meeting the
control reliability requirements of ANSI B11, Machinery Safety Standards, provides the alternative
safeguarding measures required under the exception.
Applying Lockout/Tagout Devices
Locking out: Locking out is a procedure for securing an energy-isolating device in an off, closed, or
neutral position. When an energy-isolating device is locked out, a worker can safely service hazardous
equipment. A lockout device - typically a lock with a unique key or combination - secures the energy-
isolating device in a safe position. When an energy-isolating device is locked out, the equipment it
controls will not work until the lockout device is removed.