RCDs (residual current devices) save lives — but only if they work when they're needed. That's why Australian standards require RCDs to be tested regularly, and the test reminder label on the switchboard is a key part of making sure it actually happens.
This guide covers what RCD labels are required under AS/NZS 3000 and AS/NZS 3760, how often RCDs need to be tested, and what your switchboard labels should say.
Why RCDs Need Labels
An RCD only protects you if it is working. Over time, dust, vibration, humidity, and electrical stress can cause the internal mechanism to stick or fail. Regular press-to-test checks confirm the trip mechanism is still operational.
Without a visible test reminder, these checks tend to get skipped — and a stuck RCD is an RCD in name only. The label exists to make sure the occupant or maintenance team knows the test is their responsibility, and how often to do it.
RCD Testing Frequency Requirements
Testing frequency depends on the installation type and is primarily driven by AS/NZS 3760 (in-service safety inspection and testing of electrical equipment) and WHS regulations.
| Installation Type | Push-Button Test | Operating Time Test |
|---|---|---|
| Residential (owner-occupied) | Every 3 months (recommended) | Every 2 years |
| Rental property | Every 6–12 months (state-dependent) | At change of tenancy |
| Commercial office | Every 6 months | Every 2 years |
| Commercial kitchen / wet area | Every 3 months | Every 12 months |
| Construction site | Daily visual + monthly push-button | Every 3 months |
| Hostile environment (hire equipment) | Every 3 months | Every 6 months |
State variations apply — Queensland, Victoria, and WA each have specific rental RCD testing rules. Always check your state regulator's requirements in addition to AS/NZS 3760.
What the Label Should Say
Basic Test Reminder Label
The simplest RCD label reminds the user to press the test button regularly. A typical format:
- TEST RCD QUARTERLY — for residential
- TEST RCD MONTHLY — for commercial
- PRESS 'T' BUTTON TO TEST — instructional version
Detailed Test Label
For commercial and industrial boards, a more detailed label is often fitted alongside the RCD:
- Device identification (e.g., "RCD 1")
- Test frequency ("Test every 3 months")
- Last test date field (space for a service sticker or written update)
- Next test due date field
RCD Identification Label
On boards with multiple RCDs, each needs its own identification label showing which circuits it protects. Example: "RCD 1 — LIGHTS & GPOs LEVEL 1".
Label Placement
RCD labels should be fitted:
- Directly adjacent to the RCD — not on the door, not on the panel. The label must be visible when the user is looking at the RCD itself.
- Where the test button is visible — the label and the button should be in the same glance.
- On permanent engraved material — paper labels fall off, handwriting fades, and Dymo tape peels. Engraved traffolyte is the standard.
Common RCD Labelling Mistakes
No Test Frequency Specified
A label that just says "TEST RCD" doesn't tell the user how often. Specify the interval.
Missing RCD Identification
On multi-RCD boards, if each device isn't individually identified, the user can't tell which circuits lose power when they hit the test button — so they don't test it.
Confusion Between Main Switch and RCD
On RCD main switches (where one device serves both functions), the label should make clear that it is an RCD and needs periodic testing, not just a main switch.
Labels on the Front Panel Only
If the label is on the removable front cover and the cover is off, the user loses the reminder. Labels should be on the fixed panel or directly on the DIN rail cover.
RCD Labels for Rental and Hire Equipment
If you are labelling hire equipment or rental switchboards, AS/NZS 3760 requires:
- A test tag or label showing the date of last test
- The tester's name or company
- The next test due date
These are usually separate service tags, not engraved labels — but the permanent RCD identification and test-reminder labels still need to be present on the equipment.
Related Guides
- Switchboard Labelling Requirements in Australia: AS/NZS 3000 Explained
- Main Switch & Isolator Labels: Australian Requirements
- How to Label a Switchboard: Practical Guide for Australian Sparkies
Ordering RCD Labels
Engraved traffolyte RCD labels are fast to design and cost under a dollar each in bulk. Use our Label Designer for a quick custom job, or browse pre-made templates. For trade accounts, see our pricing plans or contact us for bulk switchboard labelling work.