Safety training
Control of Hazardous Energies Standard / V5 10032026
ANNEX 2 - COHE SUPPORT GUIDANCE AND REFERENCES
1. Guidance on Safe Working Practices with Hazardous Energies
Topic
Guidance on Safe Workings
Approach boundaries
Limited Approach Boundary
This is the closest distance that an Ordinary Electrical Person can approach exposed energised conductors without escort. An Ordinary Electrical Person may be escorted within the Limited Approach Boundary by a Qualified Electrical Person but may never enter the Restricted Approach Boundary. All persons in the Limited Approach Boundary must wear the minimum PPE for electrical work. All tools that enter the Limited Approach Boundary must be insulated for the equipment’s voltage.
Restricted Approach Boundary
The Restricted Approach Boundary may only be entered by a Qualified Electrical Person. All parts of the Qualified Electrical Person that enter the Restricted Approach Boundary must be insulated from the equipment’s voltage. An Energised Electrical Work Permit is required to enter the Restricted Approach Boundary, unless performing switching or taking measurements.
Establishing an electrically safe work condition
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".
Who?
The person responsible for establishing an electrically safe work condition must be a Qualified and Authorised Person. See next section CoHE on role and responsibilities.
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verify that all contact points of the disconnected devices are fully open, or that draw-out type circuit breakers are withdrawn to the disconnected position 4) To mitigate for activation spring failure in circuit breakers equipped with spring activation, the spring must be released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
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