Safety training
Control of Hazardous Energies Standard / V3 2023-12-04
Electrical work (definition and examples)
Any task performed on an electrical installation that requires specific electrical knowledge to be performed safely and correctly. Examples: install components, alter a circuit, take electrical measurements, replace a component, create an electrically safe work condition etc. When? Whenever someone is required to enter the Limited Approach Boundary to do tasks other than ‘visual inspection’ and whenever someone needs to enter the Restricted Approach Boundary for tasks other than "switching" or "measuring"
Establishing an electrically
safe work condition (when and how to establish.)
How?
1) Determine all possible sources of electrical supply to the specific equipment. Check applicable up-to-date drawings, diagrams, and identification tags. 2) After properly interrupting the load current, open the disconnecting device(s) for each source. 3) Whenever possible, visually verify that all contact points of the disconnected devices are fully open, or that draw-out type circuit breakers are withdrawn to the disconnected position 4) To mitigate for activation spring failure in circuit breakers equipped with spring activation, the spring must be released prior to opening the breaker or prior to using the breaker as the isolation point. 5) Where the possibility of stored electrical energy exists, this must be isolated or insulated. Where this is not possible the energy must be dissipated by using an approved tool rated and designed for the purpose.
6) Verify absence of voltage to verify that the circuit parts are de-energised.
7) For low voltage circuits with the possibility of induced voltage, apply short-circuiting earth connections rated for the fault current. 8) Apply lockout/tagout devices in accordance with the local legislation and specific company procedure and rules. Depending on the configuration of the circuit it may be necessary to perform this step prior to steps five - seven. Electrical components or parts capable of being inadvertently touched or approached nearer than a safe distance by a person that is by not being enclosed or insulated (e.g. IP0X, IP1X)
Exposed electrical parts
Hazardous energy
Any energy (electrical, mechanical, hydraulic, pneumatic, chemical, thermal, gravitational force etc.) that could cause injuries to personnel.
Isolation point An isolation device shall ensure a reliable disconnection or separation from an energy source.
Live known source
Energy source where you know the level of energy (e.g., as part of a circuit, socket, or a hydraulic check/test point)
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