OHS Act Arc Flash Requirements: What South African Employers Must Know

Arc flash is not named explicitly in South African legislation. However, the hazard it represents falls squarely within the employer duties established under the Occupational Health and Safety Act (OHS Act) and its associated regulations.

For employers who operate electrical installations, the question is not whether arc flash is “required by law” as a named concept. The question is whether electrical hazards have been properly identified, assessed, and controlled in a manner that is reasonably practicable.

This article explains how arc flash fits into the OHS Act framework, what employers are expected to do in practice, and where arc flash studies are commonly used to support compliance without overstating legal or financial outcomes.

The legal starting point

South African electrical safety obligations arise primarily from:

  • The Occupational Health and Safety Act, 1993
  • The Electrical Installation Regulations
  • The General Safety Regulations
  • Applicable South African National Standards, including SANS 10142-1

These instruments establish outcome-based duties. They do not mandate specific calculation standards or prescribe a single method for assessing every electrical hazard.

Employer duties under the OHS Act

Section 8: Duty to employees

Employers must provide and maintain, as far as is reasonably practicable, a working environment that is safe and without risk to the health of employees.

In relation to electrical hazards, this requires employers to:

  • Identify hazards associated with electrical work and installations
  • Assess the risks arising from those hazards
  • Implement appropriate control measures
  • Provide information, instruction, training, and supervision
  • Maintain systems of work that are demonstrably safe

Arc flash is one of several electrical hazards that may need to be considered, depending on the installation and work performed.

Section 9: Duty to non-employees

Employers must ensure that persons other than employees who may be affected by their activities are not exposed to hazards.

In practice, this extends electrical safety duties to:

  • Contractors and subcontractors
  • Temporary and agency workers
  • Visitors who may enter electrical rooms
  • Tenant employees in shared buildings

Where arc flash hazards exist, they must be managed for all affected persons, not only direct employees.

Electrical Installation Regulations

The Electrical Installation Regulations require that electrical installations are:

  • Constructed, installed, protected, used, and maintained
  • In a manner that prevents injury to persons and damage to property

The regulations do not reference arc flash by name. Instead, they require that hazards associated with electrical installations be addressed through appropriate design, protection, and work practices.

For installations where arc flash presents a credible risk, employers are expected to demonstrate that the risk has been considered and controlled.

General Safety Regulations and Risk Assessment

The General Safety Regulations require employers to:

  • Identify hazards to health and safety
  • Assess risks associated with those hazards
  • Determine and implement appropriate control measures
  • Document the process

This is where arc flash studies are commonly introduced. They provide a structured way to quantify and document one specific electrical hazard when simpler qualitative methods are insufficient.

What “reasonably practicable” means

The OHS Act repeatedly uses the phrase “as far as is reasonably practicable”. This is a balancing test, not an absolute requirement.

Factors considered include:

  • The severity and likelihood of harm
  • The state of knowledge about the hazard
  • The availability of means to mitigate the risk
  • The suitability of those means
  • The cost relative to the risk

For facilities with complex electrical systems, high fault levels, or frequent electrical work, arc flash assessment is widely regarded as a reasonably practicable measure. For simpler installations, alternative risk assessment approaches may be sufficient.

There is no automatic requirement that every employer must commission a full arc flash study. The expectation is that the chosen approach is justifiable.

Is an arc flash study legally required

South African law does not explicitly mandate arc flash studies.

However, an employer may struggle to demonstrate compliance where:

  • Electrical work is performed on or near live equipment
  • Fault levels are high
  • Protective device behaviour is complex
  • PPE requirements cannot be justified without calculation
  • Insurers or corporate governance require quantified assessments

In these cases, arc flash studies are commonly used to meet the risk assessment obligation in a defensible way.

The role of international standards

Standards such as IEEE 1584 and NFPA 70E are not law in South Africa. They are technical and safety frameworks developed elsewhere.

They are often used because they:

  • Provide recognised engineering methodologies
  • Are accepted by insurers and multinational organisations
  • Represent current professional practice

Using these standards can support OHS Act compliance, but they do not replace local legal duties or remove employer responsibility.

What inspectors typically assess

Inspectors from the Department of Employment and Labour do not audit against IEEE 1584 or NFPA 70E. Their focus is on whether the employer has:

  • Identified electrical hazards
  • Assessed risks appropriately
  • Implemented controls
  • Trained workers
  • Maintained relevant documentation

An arc flash study may be accepted as evidence of hazard assessment, but it is only one part of the compliance picture.

What compliance looks like in practice

Effective management of arc flash risk under the OHS Act typically includes:

Hazard identification

  • Identification of equipment where arc flash could occur
  • Consideration of tasks performed on or near that equipment

Risk assessment

  • Qualitative or quantitative assessment of potential severity
  • Use of calculations where necessary to justify controls

Control measures

  • Engineering controls where feasible
  • Administrative controls such as procedures and permits
  • Appropriate PPE based on assessed risk
  • Warning labels where relevant

Training and supervision

  • Training workers to understand hazards and controls
  • Ensuring competence is maintained and documented

Documentation

  • Records of assessments, controls, and training
  • Evidence that the system is maintained and reviewed

An arc flash study supports several of these elements but does not replace them.

Common misunderstandings

“Arc flash is not mentioned, so it does not apply”

Hazards do not need to be named explicitly to fall under the OHS Act.

“Having PPE alone is sufficient”

PPE selection must be justified by a risk assessment.

“The study itself makes us compliant”

Compliance depends on implementation, not documentation alone.

“Only large or industrial facilities are affected”

The duty applies to all employers, scaled to risk and complexity.

Personal and management responsibility

The OHS Act allows for personal liability where non-compliance results from consent, connivance, or negligence. This does not mean every gap leads to prosecution.

It does mean that senior management must ensure:

  • Hazards are not ignored
  • Risk assessments are credible
  • Controls are implemented and maintained
  • Compliance efforts are demonstrable

Delegating work does not remove accountability.

When to review arc flash risk

Arc flash risk assessments should be reviewed when:

  • Electrical systems are modified
  • Protection settings change
  • Utility supply characteristics change materially
  • Work practices change
  • An incident or near-miss occurs

Periodic review intervals are commonly used, but system change is a more important trigger than time alone.

What this article does and does not claim

It does:

  • Explain how arc flash fits into the OHS Act framework
  • Clarify employer obligations without exaggeration
  • Explain where arc flash studies are typically used
  • Support informed decision-making

It does not:

  • Claim arc flash studies are automatically mandatory
  • Guarantee legal or insurance outcomes
  • Provide legal advice
  • Replace site-specific professional assessment

Final perspective

The OHS Act requires employers to manage electrical hazards responsibly. Arc flash is one such hazard that may require a structured assessment in many facilities.

The goal is not to import foreign standards or create unnecessary paperwork. The goal is to understand the risk, apply appropriate controls, and be able to demonstrate that reasonable steps were taken to protect people.

When approached this way, arc flash assessment becomes part of good electrical safety management rather than a compliance exercise driven by fear or overstatement.

Disclaimer

This article provides general information only and does not constitute legal advice, engineering design, or definitive regulatory interpretation. Obligations and expectations vary by facility, industry, and operating context. Employers should engage suitably qualified professionals for facility-specific guidance and verification.