Electrical Risk Assessment: A Step-by-Step Guide for Perth workplaces

What Is an Electrical Risk Assessment?

An electrical risk assessment is a systematic process of identifying electrical hazards in the workplace, evaluating the risks they pose, and implementing control measures to eliminate or minimise those risks. Under the Work Health and Safety (WHS) Act 2011, all Perth businesses have a duty to manage risks to health and safety, including those arising from electrical equipment and installations. This guide provides a practical, step-by-step framework for conducting electrical risk assessments in any Australian workplace.

Why Electrical Risk Assessments Are Important

Electrical hazards are among the most serious risks in Perth workplaces. According to Safe Work Australia, contact with electricity accounts for approximately 1�2% of workplace fatalities each year, with many more non-fatal electric shock incidents resulting in injuries ranging from minor burns to cardiac arrest. Key reasons to conduct electrical risk assessments include:

• Legal compliance: The WHS Act and Regulations require duty holders to identify and manage risks
• Worker safety: Protecting employees, contractors, and visitors from electrical harm
• Financial protection: Preventing costly incidents, fines, workers' compensation claims, and property damage
• Insurance requirements: Many insurers require documented risk assessments as a condition of coverage
• Due diligence: Demonstrating that your business takes proactive steps to manage electrical safety

Step 1: Identify Electrical Hazards

The first step is to systematically identify all electrical hazards in your workplace. Walk through every area of your premises�from the reception desk in your Sydney CBD office to the loading dock at your Dandenong warehouse�and document every potential electrical hazard.

Common Electrical Hazards

• Damaged portable equipment: Frayed cords, cracked plugs, damaged housings on appliances, tools, and extension leads
• Overloaded power boards and circuits: Daisy-chained power boards, too many devices on a single circuit
• Exposed wiring: Damaged cable insulation, open junction boxes, poorly terminated connections
• Inadequate RCD protection: Missing or faulty residual current devices (safety switches) in areas where they are required
• Wet environments: Equipment used in kitchens, laundries, outdoor areas, or near water sources without appropriate protection
• Overhead power lines: Particularly relevant for construction sites, crane operations, and elevated work platforms
• Underground cables: Risk during excavation work on construction and civil engineering sites
• Confined spaces: Electrical risks in tanks, silos, and other confined spaces where conditions may be hazardous
• Static electricity: Particularly in environments with flammable gases, vapours, or dust
• Electromagnetic fields: From high-voltage equipment, transformers, or welding operations

Methods for Identifying Hazards

• Workplace inspections: Walk through the site with a hazard checklist
• Review of incident records: Analyse past electrical incidents, near-misses, and workers' compensation claims
• Consultation with workers: Ask employees about electrical hazards they've observed or experienced
• Equipment audit: Review your test and tag records to identify equipment with recurring failures
• Review of plans and drawings: Examine electrical installation plans, single-line diagrams, and equipment layouts

Step 2: Assess the Risk Level

Once hazards are identified, assess the level of risk each one presents using a risk matrix. The standard Australian risk assessment methodology uses two factors:

Likelihood

Rate the likelihood of the hazard causing harm:

• 5 � Almost certain: Expected to occur in most circumstances
• 4 � Likely: Will probably occur in most circumstances
• 3 � Possible: Could occur at some time
• 2 � Unlikely: Could occur but not expected
• 1 � Rare: May occur only in exceptional circumstances

Consequence

Rate the severity of harm if the hazard is realised:

• 5 � Catastrophic: Death, multiple fatalities
• 4 � Major: Serious injury requiring hospitalisation, long-term disability
• 3 � Moderate: Medical treatment required, lost time injury
• 2 � Minor: First aid treatment, minor injury
• 1 � Insignificant: No injury or minor discomfort

Risk Level Calculation

Risk Level = Likelihood � Consequence. This produces a score from 1 to 25:

Practical Example: Frayed Extension Lead

A damaged extension lead in a Fortitude Valley warehouse:

• Likelihood: 4 (Likely) � the damage is visible and the lead is in daily use
• Consequence: 4 (Major) � electric shock could cause serious injury or cardiac arrest
• Risk Score: 4 � 4 = 16 (High) � requires urgent action

Step 3: Implement Control Measures

Apply the Hierarchy of Control Measures as specified in the WHS Regulations:

Level 1: Elimination

Remove the hazard entirely. This is the most effective control. Examples:

• Remove damaged equipment from service permanently
• Replace manual electrical processes with automated systems
• Eliminate the need for extension leads by installing permanent power outlets

Level 2: Substitution

Replace the hazard with something less hazardous:

• Replace old Class I (earthed) equipment with Class II (double-insulated) equipment
• Substitute high-voltage equipment with low-voltage alternatives where possible
• Replace damaged cords with new, higher-specification cords

Level 3: Isolation

Isolate the hazard from people:

• Lock out/tag out procedures for equipment under maintenance
• Physical barriers around exposed electrical installations
• Restricted access to switchrooms and electrical panels

Level 4: Engineering Controls

Implement physical engineering solutions:

• Install RCDs (safety switches) on all circuits�required by AS/NZS 3000 for socket outlets in most situations
• Use extra-low voltage (ELV) systems in high-risk areas
• Install weatherproof outlets and equipment in outdoor or wet areas
• Implement electrical isolation points for emergency shutdown

Level 5: Administrative Controls

Change the way people work:

• Implement a test and tag program in accordance with AS/NZS 3760
• Conduct regular visual inspections of all portable equipment
• Provide electrical safety training to all workers
• Establish lockout/tagout (LOTO) procedures for maintenance work
• Display safety signage and warning labels

Level 6: Personal Protective Equipment (PPE)

Provide appropriate PPE as a last line of defence:

• Insulated gloves for electrical work
• Insulated tools for live work (only by licensed electricians)
• Arc flash protection clothing where required

Step 4: Document the Risk Assessment

A proper risk assessment must be documented. Your record should include:

• Date of assessment and assessor's name and qualifications
• Area or activity assessed
• Hazards identified with clear descriptions
• Risk ratings (likelihood � consequence) for each hazard
• Control measures implemented or proposed for each hazard
• Residual risk after controls are applied
• Person responsible for implementing each control
• Timeline for implementation
• Review date

Many WHS software platforms provide digital templates for risk assessments. Alternatively, Safe Work Australia and state regulators like SafeWork NSW and WorkSafe Victoria provide free downloadable templates on their websites.

Step 5: Review and Update Regularly

Risk assessments are living documents that must be reviewed and updated. Review your electrical risk assessment:

• At regular intervals: At least annually for most workplaces
• When new equipment is introduced: Assess the risks of any new electrical equipment before it is put into service
• After an incident: If an electrical incident or near-miss occurs, review the relevant risk assessment
• When the work environment changes: Relocating to new premises, renovating, or changing work processes
• When regulations or standards change: Updates to AS/NZS 3760, AS/NZS 3000, or WHS Regulations
• When workers report new hazards: Respond to hazard reports from workers by reviewing and updating the assessment

WHS Regulations for Electrical Safety

The Work Health and Safety Regulations 2011 contain specific provisions for managing electrical risks:

• Division 2 � Managing risks to health and safety: General requirement to identify hazards and implement controls
• Part 4.5 � Electricity: Specific requirements for electrical equipment, installations, and work near power lines
• Regulation 157: Requires that electrical equipment is regularly inspected and tested by a competent person
• Regulation 158: Requires RCDs for socket outlets in certain situations
• Regulation 159: Requires that electrical equipment used in hostile environments is protected appropriately

Practical Examples

Example 1: Office in North Sydney

A 100-person office with standard office equipment (computers, printers, monitors, kettle, microwave):

• Hazards: Overloaded power boards, damaged cords, kettle near water source in kitchen
• Controls: RCD protection on all circuits, quarterly visual inspections, annual PAT testing, power board audit to remove daisy-chaining, relocate kettle away from sink

Example 2: Construction Site in Parramatta

A multi-storey construction project with 50 workers and heavy plant:

• Hazards: Portable tools in wet conditions, overhead power lines near crane operations, temporary wiring, extension leads in high-traffic areas
• Controls: 3-monthly test and tag per AS/NZS 3012, RCDs on all temporary supply boards, overhead line exclusion zones, toolbox talks on electrical safety, dedicated temporary wiring inspections

Example 3: Restaurant Kitchen in Surry Hills

A commercial kitchen with commercial ovens, mixers, dishwashers, and refrigeration:

• Hazards: Wet environment, grease and food contamination, high-power equipment, steam exposure
• Controls: 6-monthly test and tag (hostile environment), IP-rated outlets near water sources, RCD protection, daily visual inspection by kitchen manager, staff training on reporting damaged equipment

Conclusion

Electrical risk assessment is not a one-time task but an ongoing process of identification, evaluation, control, and review. By following this five-step framework�identify hazards, assess risk levels, implement controls following the hierarchy, document everything, and review regularly�you create a robust electrical safety management system that protects your workers, satisfies your legal obligations, and demonstrates due diligence to regulators. Whether you're managing a small office in Adelaide or a large industrial facility in Newcastle, the principles are the same. Start with the assessment, implement the controls, and keep the process alive through regular review and continuous improvement.