Electrical risks should be managed by removing exposure to live electricity wherever reasonably practicable, using planned isolation, suitable equipment and effective site controls, and making sure the people doing the work are competent and properly briefed. On a building site, electrical safety is not just the electrician’s issue. Builders, supervisors, subcontractors and other trades all influence access, sequencing, temporary power, service locations and whether controls stay effective.
Information current: 5 August 2026. Local requirements vary, so check current regulator material for the jurisdiction and the circumstances of the work. A national Model Code provides general orientation; it is not automatically applicable law in every state or territory.
Main electrical hazards on building sites
Electricity can cause shock, burns, fire, arcing or explosion. A shock can also cause a fall from a ladder, scaffold or elevated work platform.
Common site hazards include:
- damaged leads, plugs, tools, temporary switchboards or extension boards
- contact with exposed live parts or equipment that has been wrongly assumed to be de-energised
- overhead lines, underground cables and concealed wiring in walls, slabs or roof spaces
- wet conditions, conductive surfaces, cramped areas and metal structures
- leads exposed to vehicles, sharp edges, doors, heat or poor storage
- circuits being re-energised while work is incomplete
- electrical faults, overloaded circuits and repeated tripping
- old or modified installations where labels, drawings or circuit information are unreliable.
What should be sorted before work starts?
Start by identifying where electricity may be present and who controls it. Confirm the location of overhead, underground and concealed services before excavation, drilling, cutting or demolition. Coordinate the work with the principal contractor, site manager, electrician and affected trades so the sequence and exclusion arrangements are understood.
The pre-start plan should address:
- whether the work can be carried out de-energised
- the isolation point, lock-off or tagging arrangements, and how isolation will be verified
- who is authorised and competent to perform each task
- access, lighting, barriers, signage and protection from other site activity
- the condition and suitability of tools, leads, test instruments, PPE and temporary power
- required RCD protection and testing arrangements
- what workers should do if conditions change, a fault occurs or equipment is damaged
- emergency response, first aid and reliable communication.
The Model Code describes a systematic process: identify hazards, assess risks where needed, eliminate risks so far as reasonably practicable, use the most effective reasonably practicable controls where elimination is not possible, then maintain and review those controls.
What good controls and documents usually cover
Good electrical controls are practical and visible in the work area. They usually combine physical controls with clear responsibilities, consultation and records.
Relevant documents may include a project WHS plan, electrical safety procedure, isolation or lockout procedure, SWMS, risk assessment, permit, pre-start record, equipment inspection or test register, site plan showing services, and evidence of training or authorisation. The right mix depends on the activity and site.
These documents should align on the important points: the hazard, the people exposed, the control method, who is responsible, how the control is checked, and what triggers a stop and review. Unsafe equipment should be disconnected or isolated and kept out of use until it has been repaired and found safe, replaced or permanently removed.
Controls also need review when the workplace, equipment, work method or risk changes, when consultation identifies a problem, or when a control is not working as intended.
When is a SWMS commonly needed?
Under the Model Code’s model framework, permitted energised electrical work must be carried out in accordance with a SWMS. Other SWMS requirements can apply to construction work, so check the current rules and regulator material for your jurisdiction and actual task.
The SWMS must match the actual job and be readily understandable to the workers using it. It should identify the work and associated hazards, describe the controls and explain how those controls will be implemented, monitored and reviewed. Site-specific details may also be recorded in a risk assessment, permit, isolation plan, pre-start or similar document.
If the scope, service location, isolation method, environment or crew changes, pause and review the relevant controls and documents before continuing.
Warning signs that need action
Stop and get the situation checked if you see repeated RCD or circuit-breaker trips, scorch marks, heat, buzzing, exposed conductors, broken plugs, missing covers, makeshift joins, water near electrical equipment, unprotected leads in traffic areas, unclear isolation points or labels that do not match the installation.
Other red flags include pressure to work live for convenience, workers relying on assumptions instead of verification, missing service information, barriers being moved, or damaged equipment remaining available for use.
How Blue Safe can help
Blue Safe provides compliant WHS documents tailored to the client’s activities, applicable Australian WHS/OHS requirements, jurisdiction and industry. This can include electrical risk procedures, SWMS and supporting site documents suited to the work being performed.
Blue Safe guarantees the document compliance of the WHS documents it provides, including eligible customer documents after Blue Safe has reviewed and upgraded them.
Customers actively put the compliant documents into practice through controls, consultation, training, actions, records and evidence. This gives supervisors and workers a clear, consistent basis for planning the work, checking controls and responding when site conditions change.