GRACEGroup Risk Assessment Conversation & Experience transfer

Identify hazards within your own working areas…!!

Work on Electrical equipment: 1 of 3Isolation of fan

Identify Potential Hazards!

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Work on Electrical equipment: 2 of 3

Activity Isolation of fanPreparations Work Permit, Personnel Protective Equipment (PPE)Personnel Two experience electriciansCircumstances Faulty cubical breaker Similar problem had been solved earlier by changing the handle.Action The electricians received information on how to change the

handle. The handle was replaced but still did not work

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Work on Electrical equipment: 3 of 3

Actual / potential consequence 1 and 2 degree burn (on hand)/(DAFWC) serious injuryWhat happened One of the technicians opened the door and used the old handle

directly to the breaker operation axel and turned the locking arm The locking arm came too close to the live part of the fuse and

created an electrical short circuitDirect causes1-10 Short circuit3-1 Lack of knowledge of hazards presentSystem causes13-1 Inadequate assessment of needs and risks (tools &

equipment)15-10 Inadequate communication of safety and health data,

regulations or guidelines

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GRACEGroup Risk Assessment Conversation & Experience transfer

Identify hazards within your own working areas…!!

Work on Electrical System: 1 of 3Working on an 4160 V overhead

Identify Potential Hazards!

1/3

Work on Electrical System: 2 of 3

Activity Working on an 4160 V overheadPreparations Work PermitPersonnel Two electrical crewsCircumstances Failed meggar test were found on 2 of the 3 phases Repairs were made to the 2 phases Following repairs, one phase still failed the meggar testingAction It was determined that the linemen would be required to assist

in investigating the failure Since it was break time and it appeared as if it might rain, the

transformer cover was put back with two screws.

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Work on Electrical System: 3 of 3

Actual / potential consequence Electrocute / FireWhat happened The wireman crew foreman thought that the work was

completed, so he told them to install the cutouts and energize the transformer.

Immediately after being energized, one of the splice connections failed and the 4160 volt feeder tripped out on ground fault.

Direct causes3-1 Lack of knowledge of hazards present7-3 Work expose to energized electrical systemSystem causes13-1 Inadequate assessment of needs and risks (tools &

equipment)14-4 Inadequate enforcement of Policies, Standards,

Procedures15-10 Inadequate communication of safety and health data,

regulations or guidelines 3/3