Safe Systems of Work

Are Your Safe Systems Actually Safe?

Electrical safety depends on more than technical knowledge and written procedures.

It depends on whether your organisation has clear, practical and consistently applied safe systems of work.

When electrical tasks are poorly planned, responsibilities are unclear or isolations are not properly verified, even experienced people can be exposed to serious risk.

At Electrical Safety UK, we help organisations strengthen their electrical safety arrangements through electrical safety management, arc flash and system studies, and electrical safety training.

What is a safe system of work?

A safe system of work is a structured method for completing a task safely.

It should explain:

• What work needs to be carried out
• What hazards and risks are involved
• Who is responsible for each stage
• What controls must be implemented
• What competence, tools and equipment are required
• How the work will be supervised and communicated
• What to do if conditions change

For electrical work, this may include:

• Risk assessments
• Method statements
• Permit-to-work arrangements
• Isolation procedures
• Switching schedules
• Competence requirements
• Inspection and testing arrangements
• Emergency procedures
• Handover and return-to-service processes

A safe system should not be a generic document stored in a folder. It should reflect the actual equipment, location, people and task.

Electrical Safety UK can support organisations in developing and reviewing electrical safety management systems so that procedures are practical, proportionate and aligned with the way work is actually carried out.

Permit-to-work explained simply

A permit-to-work is a formal process used to control higher-risk activities.

In simple terms, it confirms that:

1. The work has been properly planned.
2. The hazards have been identified.
3. The required controls are in place.
4. The correct equipment and work area have been identified.
5. Everyone involved understands the scope of work.
6. The work can begin safely.

A permit should clearly define:

• The exact equipment or area covered
• The work that is authorised
• The work that is outside the scope
• The hazards and precautions
• The required isolations
• Who has authorised the work
• Who is responsible for carrying it out
• The start and expiry time
• How the permit will be suspended, cancelled or closed

A permit is not a substitute for a risk assessment, competent people or effective supervision. It is a communication and control tool. Its value comes from the quality of the planning and the behaviours that support it.

Electrical Safety UK can help review or develop permit-to-work processes, ensuring they are understood by everyone from duty holders and managers to authorised and competent persons.

Isolation procedures: an overview

Isolation is one of the most important controls in electrical safety.

A robust isolation procedure should normally address the following stages.

1. Identify the correct equipment – Confirm exactly what is to be worked on.

This may involve checking drawings, schematics, labels, equipment schedules and site information. However, documentation should always be supported by physical identification and appropriate verification.

2. Identify all sources of energy

Electrical energy may come from more than one source, including:

• Main supplies
• Generators
• UPS systems
• Batteries
• Solar PV systems
• Control circuits
• Backfeeds
• Interconnected equipment
• Stored or induced energy

The isolation procedure must consider all relevant sources—not just the obvious incoming supply.

3. Switch off and isolate

The correct isolation point/s should be operated and secured to prevent inadvertent re-energisation.

Depending on the system, this may involve:

• Locking off
• Applying warning tags
• Removing fuses or links
• Securing switching devices
• Controlling keys
• Establishing a defined switching sequence

4. Discharge or control stored energy

Some equipment can remain hazardous after the supply has been disconnected.

Capacitors, batteries, rotating machinery and other stored-energy sources must be discharged, restrained or otherwise controlled.

5. Prove the system is dead

The equipment must be tested to confirm that it is de-energised at the point of work.

The test should be carried out using suitable test equipment and by a competent person. The test instrument should be checked before and after use.

Switching something off is not the same as proving it is dead.

6. Apply additional precautions where required

Depending on the nature of the work, further controls may be needed, such as:

• Temporary protective earths
• Barriers and screens
• Safety locks
• Restricted access
• Additional supervision
• Arc flash controls
• Specialist personal protective equipment

7. Maintain control until the work is complete

The isolation must remain secure throughout the work.

If the task is interrupted, the team changes or the scope expands, the safe system should be reviewed before work resumes.

Electrical Safety UK’s arc flash and system studies can help organisations better understand electrical hazards, prospective fault currents, protection arrangements and the risks associated with energised equipment.

What good looks like

A strong safe system of work can be seen in how people plan, communicate and perform tasks.

Clear responsibilities

Everyone understands who is:

• Authorising the work
• Managing the isolation
• Issuing the permit
• Accepting the permit
• Carrying out the work
• Supervising the task
• Confirming the equipment is safe to return to service

There is no uncertainty about who has decision-making authority.

Site-specific documentation

The risk assessment and method statement reflect the actual equipment, location and work activity.

They are not simply copied from a previous job.

Effective pre-start briefings

The team discusses:

• The work scope
• The hazards
• The isolation arrangements
• The required controls
• Individual responsibilities
• Emergency arrangements
• What would require the work to stop

People are given the opportunity to ask questions and raise concerns before work begins.

Secure, verified isolations

The correct isolation point is identified, locked off, labelled and controlled.

The isolation is properly verified, with the results recorded where appropriate.

Competent people

Those involved understand their roles and have the knowledge, experience and training required for the task.

Electrical Safety UK can support this through targeted electrical safety training, helping employees and contractors understand safe systems, electrical hazards, permit controls, isolation principles and their responsibilities.

Stop-work authority

Everyone knows that work must stop if:

• The equipment does not match the drawings
• The isolation cannot be confirmed
• Conditions change
• The scope of work expands
• Unexpected equipment is found
• Someone is unsure about the next step

Stopping work should be treated as a positive safety behaviour—not a failure.

Controlled handback

When work is complete:

• The work area is checked
• Tools and temporary controls are removed
• Guards and covers are reinstated
• People are accounted for
• The permit is formally closed
• The equipment is handed back through an agreed process

The system should not be re-energised simply because the physical work appears to be finished.

Are your safe systems actually safe?

Ask yourself:

• Can the people doing the work explain the hazards and controls?
• Can they identify the correct isolation point/s?
• Can they explain how the isolation has been verified?
• Are permits issued before work starts?
• Are contractors working to the same standards as employees?
• Does your documentation reflect the equipment currently installed?
• Would your system remain effective during a delay, interruption or handover?
• Are lessons from incidents and near misses being used to improve your arrangements?

If the answer to any of these questions is uncertain, your organisation may benefit from an independent review.

A document review alone is not always enough. Effective assurance should also consider workplace behaviours, management arrangements, technical information, competence and the practical application of procedures.

How Electrical Safety UK can help

Electrical Safety UK can help organisations assess and improve their electrical safety arrangements through:

• Electrical safety management — reviewing and strengthening policies, procedures, responsibilities and assurance arrangements
• Arc flash and system studies — improving understanding of electrical hazards, system characteristics and risk controls
• Training — building the knowledge and confidence required to plan and carry out electrical work safely

Safe systems of work should make the safe way the clear way.

The question is not whether your organisation has procedures.

The question is whether those procedures are understood, applied and effective when it matters.

Are your safe systems actually safe?

Systems review

Contact Electrical Safety UK to arrange a systems review and identify where your electrical safety arrangements can be strengthened.

Book a site evaluation to review your safe systems of work. We can provide you with a fixed price, no obligation, quotation for your electrical safety needs including training.

Give us a call on 0800 652 1124, email us at info@elecsafety.co.uk or contact us through our website at https://elecsafety.co.uk/about/contact/.