WSH Alert Accident Advisory, 12 November 2020: Worker electrocuted during dismantling works
12 November 2020, Ref: 2021069
Accident Advisory: Worker electrocuted during dismantling works
|Ref: 2021059 WSH Alert Accident Notification dated 19 October 2020|
|On 15 October 2020, a worker was dismantling an electrical distribution board within a vacated building when he was electrocuted. He was sent to the hospital where he was pronounced dead.|
| Figure 1: The electrical distribution|
board that the worker was dismantling.
Stakeholders in control of similar workplaces and work activities, such as occupiers, employers and contractors, are advised to consider the following risk control measures to prevent similar accidents:
• Deploy only authorised and competent personnel such as licensed electrical
worker (LEW) to perform all electrical work including dismantling works. There
are 3 classes of electrical worker licence, namely: Electrician’s Licence,
Electrical Technician’s Licence and Electrical Engineer’s Licence. Find out more
about the various licences at the Energy Market Authority’s website.
• Provide specialised electrical safety training to workers who need to work with,
or around live or exposed electrical components. Provide periodic re-training or
refresher training as necessary.
|Isolation of hazardous energy|
• Isolate and lock out the electrical power source and de-energise the equipment
prior to working with it. Proper lock-out and tag-out (LOTO) procedures must
be established and supervisors are to check that LOTO has been correctly
applied on-site before allowing the work to proceed.
|Personal protective equipment|
• Equip workers performing electrical work with the necessary personal
protective equipment (PPE) such as electrical work gloves and rubber-soled
• Supervisors are to ensure that the PPE provided are worn correctly and at all
times when performing electrical works.
|Safe work practices for workers|
• Always conduct visual checks on electrical equipment and its wiring before
starting work. Do not attempt electrical work if the equipment is energised and
an electrical component or wire has been found to be damaged or defective in
• Avoid carrying out electrical works under wet conditions.
• Use only tools with non-conducting handles when carrying out electrical work.
• Work on top of a dry rubber insulating mat where practicable.
• Use a non-contact voltage detector to detect presence of residual voltage in
Employers and contractors are reminded to conduct a thorough Risk Assessment (RA) before carrying out electrical works to manage any foreseeable risk(s). The RA should cover, but not limited to, the following areas:
|• Presence of live or exposed electrical components and wires.|
• Safe work procedures for electrical work including the LOTO procedure.
• The need to implement a Permit-to-work system for electrical work.
• Types of tools and/or equipment available for electrical work.
• Possibility of wires or cables becoming live during electrical work.
1. Workplace Safety and Health Act
2. Workplace Safety and Health (Risk Management) Regulations
3. Workplace Safety and Health (General Provisions) Regulations
4. Workplace Safety and Health (Construction) Regulations
5. Code of Practice on Workplace Safety and Health Risk Management
6. Electricity Act
7. Electricity (Electrical Workers) Regulations
8. SS 638: 2018 Code of Practice for Electrical Installations
9. SS 571: 2011 Code of Practice for Energy Lockout and Tagout
10. Energy Market Authority’s website: http://www.ema.gov.sg/
11. Energy Market Authority’s “Electrical Safety at Construction Sites”
12. Energy Market Authority’s Electrical Accident Case Studies & Lessons Learnt
13. WSH Council’s Activity-Based Checklist on Safe Electrical Maintenance Work
14. WSH Council’s 6 Basic WSH Rules for Use of Electrical Equipment
Information on the accident is based on preliminary investigations by the Ministry of Manpower as at
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