As an electrical contractor bidding on commercial work, you are likely dealing with head contracts that spell out insurance requirements. The two most common types you will see are public liability (PL) and professional indemnity (PI). Understanding what each covers — and where the lines overlap — helps you meet your compliance obligations and protect your business.
Public liability insurance is the foundation. It responds when your business activities cause injury to a third party or damage to their property. If you accidentally drill through a water pipe, drop a tool from a ladder, or leave a cable that trips a visitor, your PL policy is designed to cover the resulting claims and legal costs. Many commercial landlords, builders, and project managers will ask for a certificate of currency showing a minimum PL limit — commonly $20 million — before you even set foot on site.
Professional indemnity insurance covers financial loss that your client suffers because of your professional advice, design work, or certification. For an electrical contractor, that includes things like:
- Design liability: When you design a switchboard layout or power distribution system and an error later causes downtime or rework.
- Testing and certification: If you certify an installation as compliant with AS/NZS 3000 and a fault traced back to that certification results in a loss.
- Specifications and advice: Where a client relies on your written recommendation for a particular system and it turns out to be unsuitable for their needs.
Unlike PL, PI claims are often about pure economic loss — there is no physical damage or injury, but the client has lost money because of something you did or told them. PI policies are typically written on a “claims made” basis, meaning the policy that is in place when the claim is notified is the one that responds, not the policy that was active when you did the work. That makes it important to maintain continuous cover.
Where the two intersect Some scenarios can trigger both policies. Suppose you install a distribution board based on a design flaw you created. A short circuit causes a fire that damages the client’s building and destroys tenant stock. The property damage and third-party injury will fall under your PL cover. If the client also sues you for the cost of re-engineering the board and for business interruption during the repair period, your PI policy may pick up those losses.
What commercial contracts typically ask for The exact requirements vary, but most head contracts will:
- Specify a minimum PL limit (often $10–$20 million).
- Require PI insurance if you are doing any element of design, consulting, or certification.
- Ask you to note the principal as an interested party on the PL policy.
- Require you to maintain run-off cover after the project finishes — common with PI.
- Reference compliance with AS/NZS 3000 and other standards, which can affect how an insurer views a claim.
The AS/NZS 3000 angle The Wiring Rules set the benchmark for safe electrical installation in Australia. From an insurance perspective, a major departure from those rules can look like negligence. If you sign off on work that does not comply, and a loss flows from that non‑compliance, a PI or PL insurer may look closely at whether you met the required professional standard. Staying current with the standard and documenting your compliance steps is a practical risk management tool.
Taking the next step ElectricianInsurance provides general business insurance information to help you understand your obligations. We are not an insurer, underwriter, or insurance broker, and this article is general in nature — it does not consider your individual business circumstances. Before you sign a contract or renew a policy, speak with a qualified insurance broker or authorised representative who can tailor cover to the work you actually do. If you want help finding the right advice, you can contact ElectricianInsurance to discuss an enquiry or get a referral to appropriately authorised assistance.