If a treatment room in your facility has a green sign on the wall showing a stick figure, it’s a designated patient area under AS/NZS 3003. Patient areas need extra electrical protection because a patient connected to medical equipment is far more vulnerable to electric shock than anyone else in the building. This guide explains the difference between body protected and cardiac protected areas, what the standard requires in each, and how often they need testing.
What AS/NZS 3003 Covers
AS/NZS 3003:2018, Electrical installations: Patient areas, sets the extra requirements for the fixed electrical installation in rooms where patients are treated with medical electrical equipment. It sits on top of the Wiring Rules (AS/NZS 3000).
It’s about the room, not the equipment. AS/NZS 3003 covers the outlets, RCDs, bonding, isolated supplies and signage. The medical equipment plugged into those outlets is tested separately under AS/NZS 3551. A compliant facility needs both.
Body Protected vs Cardiac Protected Areas
The classification depends on how the equipment used in the room connects to the patient.
Body protected areas are rooms where equipment applied parts touch the patient’s body but don’t connect directly to the heart. Typical examples include emergency departments, medical and surgical wards, non-cardiac theatres, delivery suites and dental surgeries. Equipment marked with a Type B or BF symbol points to a body protected area.
Cardiac protected areas are rooms where equipment can connect directly to the heart, for example through cardiac catheters or pacing leads. Typical examples include cardiac catheter labs, cardiac surgery theatres, CCU, ICU and NICU. Equipment marked with a Type CF symbol points to a cardiac protected area.
Key Requirements in a Body Protected Area
- Every socket outlet and permanently wired item in the area is protected by a 10 mA, Type I, double pole RCD that trips within 40 milliseconds.
- The RCD is located in the patient area, readily accessible and visible, and controls no more than 12 points.
- No other RCD, such as a 30 mA device at the switchboard, backs up the room’s RCD.
- Outlets are labelled with their distribution board, circuit breaker and RCD details.
- A beige cleaners’ outlet, marked for cleaning purposes only, sits on its own circuit with its own 10 mA RCD.
- A green area sign is mounted where it can be seen on entry, with a test label showing when the area was last tested and by whom.
What a Cardiac Protected Area Adds
Cardiac protected areas carry everything above plus stricter requirements, because even a tiny leakage current reaching the heart can cause ventricular fibrillation.
- Full equipotential bonding, so exposed metal within reach of the patient is bonded back to a single equipotential junction.
- RCD protection dedicated to each patient location, or an isolated supply from an isolation transformer with a line isolation monitor.
- Socket outlets on isolated supplies marked “Isolation Transformer Protected”.
How Often Do Patient Areas Need Testing?
Patient areas are tested before they’re first used and after any alteration or repair. After that, they’re inspected and tested at intervals not exceeding 12 months.
A typical periodic test covers RCD trip current and trip time on every RCD, earth continuity and equipotential bonding, insulation resistance, isolated supply and line isolation monitor function where fitted, and the condition of signage and labels. The results are recorded and the test label on the area sign is updated.
Common Gaps We Find
- Area signs with expired test labels, or no label at all.
- Rooms used for procedures that were never designated or tested as patient areas.
- Power boards plugged into protected outlets, extending protection to places it was never designed for.
- Equipment testing up to date under AS/NZS 3551, but the room itself not tested under AS/NZS 3003.
Testing Both the Room and the Equipment
Nova Biomedical tests body protected and cardiac protected areas to AS/NZS 3003 alongside medical equipment electrical safety testing to AS/NZS 3551, usually in the same visit. That gives you one provider, one schedule and one set of records for your next accreditation survey. If you’re not sure which standard applies to an item, our guide to AS/NZS 3551 vs AS/NZS 3760 explains the difference.
We work with hospitals, day surgeries, dental practices and specialist clinics across Queensland, New South Wales and Western Australia.
FAQ
What is the difference between a body protected and a cardiac protected area?
A body protected area is used for procedures where equipment touches the patient’s body. A cardiac protected area is used where equipment can connect directly to the heart, so it needs extra protection such as full equipotential bonding and dedicated RCDs or an isolated supply.
How often do body protected areas need testing?
Body protected and cardiac protected areas are inspected and tested at intervals not exceeding 12 months, plus before first use and after any alteration or repair.
What RCD is required in a body protected area?
A 10 mA, Type I, double pole RCD that trips within 40 milliseconds, located in the patient area and controlling no more than 12 points.
Is AS/NZS 3003 testing the same as AS/NZS 3551 testing?
No. AS/NZS 3003 covers the electrical installation in the room. AS/NZS 3551 covers the medical equipment used in it. Both are needed for compliance.
Book Your Patient Area Testing
Need your body protected or cardiac protected areas tested before your next survey? Contact Nova Biomedical and we’ll schedule AS/NZS 3003 and AS/NZS 3551 testing together.
