RCD Testing Services WA 2026 - Get Quotes

Push Button Tests and Trip Time Tests

Every RCD has a test button, and pressing it creates a small, deliberate imbalance inside the device that should make it switch off immediately. The push button test checks that the mechanism moves freely and the contacts open, which matters because RCDs that sit untouched for years can stick. Anyone can do it at home or at work, provided they warn others first, because everything on that circuit will lose power, and a device that fails to trip, trips only after several presses or will not reset should be checked by a licensed electrician straight away. In Western Australia, owners are commonly advised to press the test button every three months. Setting a calendar reminder at the change of each season makes the habit easy to keep.

A push button test does not measure how fast the device trips, yet trip speed is the figure that determines how much current can pass through a person before power is cut. The trip time test uses an RCD tester, usually part of a multifunction installation tester, which plugs into an outlet or connects at the switchboard and draws a precise leakage current through the device. The instrument records how many milliseconds the RCD takes to cut power, and many testers also check the current at which it trips. Testing is carried out at the device's rated current and often at multiples of it, which shows whether the RCD still responds quickly to a larger fault. Results are recorded against each device, giving the business or owner a record that the protection works, not just that the button clicks.

Trip Times, Ratings and What Counts as a Pass

RCDs are rated by the leakage current that should trip them. Devices protecting power and lighting circuits in homes are usually rated at 30 milliamps, while 10 milliamp devices are used in some higher risk settings, such as certain medical and childcare areas. When tested at their rated current, AS/NZS 3760 commonly sets a maximum trip time of 300 milliseconds for 30 milliamp devices and 40 milliseconds for 10 milliamp devices. Modern RCDs in good condition usually trip well inside those limits, often in 20 to 40 milliseconds, and a device that is slow, or that only trips at a much higher current than its rating, fails the test and needs replacing. Testers record the result in milliseconds, so trends can be compared year to year.

Results that are close to the limit deserve attention even when they pass. An RCD that tripped in 30 milliseconds last year and 250 this year is deteriorating, and it may fail completely before the next test. Heat inside meter boxes on west facing walls, which is common across Perth's newer suburbs, dust and humidity in coastal and northern areas all speed up ageing. RCDs also have a rated life, and many electricians recommend replacing very old devices rather than relying on them indefinitely. A licensed electrician can advise whether a borderline device should stay or go, and an electrical safety inspection checks RCDs alongside the rest of the installation.

WA's Two RCD Rule for Homes Being Sold or Rented

Western Australia has long had a requirement that goes beyond most other states. Residential properties must have at least two RCDs protecting all power point and lighting circuits before ownership is transferred on a sale, and rental properties must have them before a tenancy begins. The seller is responsible on a sale, and the landlord or lessor on a rental. The rule comes from WA's electricity licensing regulations and is overseen by the state's electrical safety regulator. Homes already fitted with compliant RCDs need no further work, but many older homes still need an extra device or a switchboard upgrade to comply. The cost of that work is usually modest compared with the price of the property.

Sellers are wise to check compliance early in the sale process, because arranging an electrician, a new RCD or a switchboard upgrade in the last week before settlement adds stress and cost. Settlement agents, buyers and property managers often ask for written confirmation from a licensed electrician that the requirement has been met, and the same regulations require compliant smoke alarms in homes being sold or rented, so the two checks are often done together. Landlords should also make sure RCDs keep working throughout a tenancy, as a tripping or faulty device is a safety issue that needs prompt repair. Smoke alarm compliance for sales and leases can be handled at the same visit through smoke alarm installation services.

Testing RCDs at Home

Home owners and renters can do the push button test themselves every three months, and it takes only a few minutes. Warn everyone in the house first, save work on computers and be ready to reset clocks, alarms and timers afterwards, and press the test button on each safety switch in turn. The switch should snap to the off position immediately, cutting power to the circuits it protects, and it should reset normally when pushed back up. If a switch does not trip, trips slowly or will not reset, call a licensed electrician rather than leaving it.

A trip time test by an electrician is worth doing every few years, when buying or selling, or when an RCD is getting old. It confirms the device is fast enough to protect a person, not just that the mechanism moves, and many electricians include RCD testing in a general safety check of the switchboard, wiring and smoke alarms. Homes with pools, spas, outdoor kitchens and garden lighting have more outdoor circuits exposed to water, so RCD protection matters even more there. Outdoor outlets and lighting circuits that trip in wet weather often need their fittings resealed or replaced, and outdoor lighting installation specialists can fix leaking fittings.

RCD Testing in Workplaces

Workplaces in Western Australia must manage electrical risks under the Work Health and Safety Act 2020, and the regulations require RCD protection for portable equipment used in higher risk conditions, such as on construction sites and where equipment is exposed to moisture, heat, vibration or damage. Those RCDs must be tested regularly to confirm they work. AS/NZS 3760 sets out recommended intervals for both push button tests and instrument trip time tests, with construction sites and hostile environments at the most frequent end. Fixed switchboard RCDs in offices and shops are commonly trip tested once a year, while portable RCDs on building sites are push tested before each use, and many businesses book this on the same visit as emergency lighting testing. Results should be recorded in a register, just like test and tag and microwave leakage testing results. Missing records are one of the most common gaps found in workplace safety audits.

Many businesses combine RCD testing with their single phase test and tag schedule, since the same provider can test portable RCDs as part of the equipment register and trip test fixed devices at the switchboard. Trip testing switchboard RCDs cuts power to the circuits they protect, so offices, shops and kitchens usually schedule it before opening or after hours, and servers, refrigeration, alarm systems and medical equipment may need to be shut down or switched to backup power first. A good provider will ask about these risks before starting. Businesses planning larger electrical changes found during testing often bring in a commercial electrician to design the work.

Portable RCDs and Safety Switch Adaptors

Portable RCDs plug in between a power point and a tool or lead, adding shock protection where the fixed outlet is not already protected. They are common on building sites, in older workplaces, at events and for tradespeople working in homes where the wiring may not have RCDs. Some are built into extension leads, while others are small adaptors that fit onto a plug. Users should push test them before each use, because a portable RCD that has been dropped or left in the rain may no longer work. They are also tested and tagged as part of the regular equipment register.

Portable RCDs are a useful backup but not a substitute for protection at the switchboard. They protect only what is plugged into them, and they can be forgotten or removed. On construction sites, AS/NZS 3012 expects supply to portable equipment to be protected at the source, usually through the site switchboard or a portable outlet device, which is checked during three phase test and tag. Tradespeople should still carry one when working in older homes or unfamiliar buildings, and any portable RCD that fails a test should be discarded, since repairing them is rarely practical. Replacement units are inexpensive and widely available from electrical wholesalers.

Nuisance Tripping and What It Means

A safety switch that trips for no obvious reason is frustrating, but it is usually doing its job. The most common cause is an appliance leaking a small amount of current to earth, such as an old oven element, a hot water system element, a fridge with a failing defrost heater, a washing machine or a pool pump. Moisture is the next culprit, with water getting into outdoor power points, garden lights, pool equipment and ceiling fittings under leaking roofs, which explains why tripping often increases during Perth's winter rain. Damaged extension leads and power boards also cause trips. Occasionally the RCD itself is faulty and trips too easily, which an instrument test can confirm by measuring the leakage current at which it operates.

Finding the cause starts with unplugging everything on the affected circuit and plugging items back in one at a time until the trip returns. If the switch still trips with nothing plugged in, the fault is likely in the fixed wiring or a hardwired appliance, and a licensed electrician will need to test the circuits. Several small leakages from many appliances on the same RCD can add up and cause tripping, which is another reason to spread circuits across more devices. Never bypass or remove an RCD to stop tripping, because that removes the protection entirely. Persistent faults that are hard to trace are best handled through electrical fault finding, while pool pumps that trip safety switches can be checked by pool pump and filter repair technicians.

Upgrades, RCBOs and Solar or EV Systems

Many WA homes still have older switchboards with a single RCD or none at all, ceramic fuses and no spare space for new circuits. Upgrading adds protection, allows circuits to be split sensibly and prepares the home for air conditioning, solar and electric vehicle charging. RCBOs, which combine a circuit breaker and RCD in one unit for each circuit, are increasingly popular because a fault on one circuit leaves the rest of the house running. They cost more per circuit than a shared RCD, but they make fault finding far easier. An upgrade with RCDs and new breakers typically costs $1,200 to $3,000, depending on the board, the number of circuits and whether the meter panel also needs work. Western Power may need to be involved where the meter or service connection is affected.

Solar inverters, batteries and EV chargers bring their own RCD considerations. Some equipment produces types of leakage current that ordinary RCDs do not detect reliably, so manufacturers and the wiring rules may call for particular RCD types, such as Type A or Type B devices, on those circuits. The installer is responsible for fitting the correct protection, and owners should not swap devices themselves. Adding a system to an older board is a good moment to review protection across the whole house. Solar installations in WA are designed and connected by licensed installers, and solar panel installation businesses usually check the switchboard as part of the job. Battery additions to existing solar systems deserve the same check.

Older Switchboards, Asbestos Panels and Rewiring

Many older WA homes still have their original meter boxes, with ceramic fuses, a single early model RCD or no safety switch at all, and some of these boards are mounted on panels containing asbestos, which was common in electrical meter boards for decades. Asbestos panels are generally safe while left undisturbed. Drilling, cutting or breaking them releases fibres, so an electrician working on the board has to follow safe work procedures, and replacing the panel may be recommended during an upgrade. Signs that a board needs attention include scorch marks, a burning smell, fuses that blow often, loose or cracked covers and wiring that looks brittle or taped together. None of these can be fixed by adding an RCD alone.

Where the wiring itself is old, an RCD may trip repeatedly because ageing insulation leaks current to earth, which is a sign the circuits need testing and possibly rewiring. Rubber insulated wiring from the middle of last century is a particular concern, because it crumbles with age. An electrician can test insulation resistance on each circuit to see whether the wiring is sound enough to keep. New work and alterations must meet AS/NZS 3000, the wiring rules, which are published by Standards Australia and updated periodically. Homes built or renovated recently should already have full RCD protection. Older properties often need a staged plan, starting with the board and the circuits that matter most, so owners can spread the cost while fixing the most serious risks first.

Regional Considerations Across Western Australia

Perth's older suburbs, from the western suburbs and the inner north to Bassendean, Midland and parts of the southern suburbs, hold many homes with original or partly upgraded switchboards, where the two RCD rule often requires work before sale or lease. Newer suburbs in the northern and southern corridors usually have modern boards with full RCD coverage. Meter boxes on hot, west facing walls can reach very high temperatures in summer, which ages RCDs and breakers faster. Coastal homes from Mandurah to Two Rocks see salt air corrosion inside outdoor meter boxes.

Regional WA brings harsher conditions. The Pilbara and the Kimberley combine extreme heat, humidity in the wet season and fine dust, all of which affect switchboards and RCDs, while cyclone season can drive water into outdoor fittings. Farmhouses and sheds in the Wheatbelt and the Great Southern often have long supply runs and older installations. Holiday homes in the South West and along the coast may sit empty for months, so owners should test RCDs when they arrive. Air conditioners that trip safety switches after sitting unused over winter may have moisture or a developing fault, and air conditioning repair technicians can check them.

What RCD Testing Costs in WA

Trip time testing typically costs $10 to $25 per RCD when done as part of a larger job, such as test and tag or a switchboard check. A home safety switch check visit by an electrician usually runs $120 to $220, often including smoke alarm checks. Portable RCDs cost around $8 to $20 each to test with other equipment. Most providers charge a minimum for small jobs to cover travel and time, while contractors who resell RCD testing often buy it at wholesale through white label subcontracting.

Replacing a faulty RCD usually costs $200 to $450, and adding a second RCD to meet the sale or rental requirement $250 to $600 depending on the board. Fitting RCBOs runs around $150 to $320 per circuit, and a full switchboard upgrade $1,200 to $3,000. Tracing nuisance tripping typically costs $150 to $450, depending on how quickly the fault is found. For other electrical work found during testing, the rates of electrical services providers give a useful comparison.

What to Look Out For

Never accept an offer to bypass or remove a tripping RCD, which is dangerous and not permitted. Check that anyone replacing RCDs or working on the switchboard is a licensed electrician working for a licensed contractor. Ask for trip times to be recorded, not just a note that the button was pressed. Make sure the electrician confirms which circuits each RCD protects.

Sellers and landlords should check compliance with the two RCD rule well before settlement or a new tenancy. Keep written confirmation of the work. Get a quote in writing for any replacement or upgrade before it starts. Where a dispute with a trader cannot be resolved, WA's consumer protection agency within the Department of Local Government, Industry Regulation and Safety (LGIRS) offers guidance on the next steps.

How to Get Useful Quotes

Say whether the job is for a home, a rental, a sale or a workplace, and how many safety switches you think there are. Send a photo of the switchboard, which lets an electrician see the age and layout at a glance. Mention any tripping problems and when they happen. Include the suburb or town and any deadline, such as a settlement date or the start of a tenancy.

Ask each provider whether trip times will be recorded and whether a written report or compliance confirmation is included. Check the price for replacing a failed RCD or adding a second one if needed. For workplaces, agree when power can be turned off. Buyers checking a home before purchase can include the switchboard and RCDs in a building inspection, which flags electrical items that need further checks.