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Electricity is essential on construction sites, but if the risks are not managed properly, it can pose serious dangers to people and property. Proper controls must be in place wherever electricity is used to keep everyone safe. 

Because we use electricity differently across a site there are different ways to help manage the risks. 

Residual Current Devices (RCDs) 

An RCD is an electrical safety device designed to immediately switch off the supply of electricity when electricity ‘leaking’ to earth is detected at harmful levels. RCDs offer high levels of personal protection from electric shock.

There are three types of RCD:

Fixed at the switchboard

• A switchboard RCD is the best option in most situations. It protects all the electrical wiring and appliances supplied from that circuit. 
• An electrician must install a switchboard RCD.

Built into the powerpoint

• A socket-outlet RCD is built into a standard powerpoint to provide protection to equipment plugged into that powerpoint and, if required, downstream protection of other powerpoints. 
• An electrician must install a socket-outlet RCD.

Portable 

• A portable RCD can be moved from powerpoint to powerpoint as needed. There are a few different types of portable RCD: 
• Some plug directly into a powerpoint. An appliance or extension lead then plugs into the portable RCD. 
• Some are built into extension leads or individual appliance leads. 
• Some are built into Portable socket-outlet assemblies (PSOAs). 
• No electrician is needed – you can buy a portable RCD at a hardware shop or from an electrical equipment supplier, just make sure it is fit for purpose. 

Testing

Keep you and your team safe while working around electricity by checking your RCD regularly. Across Australia, the testing frequency is based off the standard,  AS/NZS 3012:2019 which sets the specific requirements for construction sites and states:

• Portable RCDs are to be push button tested daily before every use and an operating time test is to be performed by a competent person every 3 months. 
• Fixed RCDs are to be push button tested 1 month and an operating time test is to be performed by a competent person every 12 months.

If an RCD is tested and found to be faulty it must be taken out of service immediately and replaced as soon as possible.

Leads and Cords

Leads and cords are easily damaged, particularly those connected to equipment that is often moved. To protect them: 

• Use cable protectors, covers, non-conductive hooks, and ramps.
• Protect leads from sharp objects, footwear, doors, vehicles, liquids, grease, and heat.
• Arrange leads to prevent tripping hazards. Avoid running leads across aisles or passages.
• Elevate leads to keep them off the ground and ensure they are accessible without needing a ladder.
• Use insulated supports to relieve strain on plugs.
• Inspect leads for damage before use and have them tested and tagged regularly by a qualified person.

Testing and Tagging of leads and cords

Inspection, testing and tagging of electrical leads and cords on construction sites are required to be completed every 3 months* by a competent person. 

Any lead or cord that is damaged or that fails testing is to be immediately taken out of use and removed offsite. If you cannot promptly remove it offsite, consider other means like attaching a durable out of service tag so as to warn workers not to use that piece of equipment.

Monitor and Review

When you complete your regular Site Reviews using the HazardCo App, make sure that you are checking RCD’s and all other electrical equipment are in good working condition and are regularly inspected and tested. 

Further Information 

If you have any questions in regards to this topic or need more support , reach out to HazardCo and speak to one of our expert Health and Safety Advisors. You can contact us on 1800 954 702.

*For Hire equipment, inspection is required prior to each hire and testing is carried out at least monthly. If hire equipment remains on the construction site then the frequency listed applies.