IEC 60601 Explained: Safety Standard and Routine Testing

What the IEC 60601 family covers

IEC 60601-1 is the general standard. It sets requirements for protection against electric shock, mechanical hazards, excessive temperature, radiation and other risks, and for essential performance, meaning the functions that must continue to work safely. It applies to the equipment as a whole, including its accessories, software and risk management.

Around it sit collateral standards, numbered IEC 60601-1-x, covering topics such as electromagnetic compatibility, usability and alarm systems, and particular standards, numbered IEC 60601-2-x, for specific device types. For example IEC 60601-2-2 deals with high-frequency surgical equipment and IEC 60601-2-41 with surgical luminaires. Which parts apply depends on the device.

Key concepts: classes and applied parts

Equipment is classified by how it protects against electric shock. Class I devices rely on a protective earth connection in addition to basic insulation, while Class II devices have double or reinforced insulation and no earth. Internally powered equipment is a separate category.

Applied parts, those that contact the patient, are rated Type B, BF or CF according to the degree of protection against leakage current, with CF being the most stringent and intended for direct cardiac contact. Knowing the class and type tells you which limits and tests apply.

• Class I: protective earth required
• Class II: double or reinforced insulation
• Type B, BF, CF: increasing protection for applied parts
• Essential performance: functions that must be maintained for safety

IEC 62353: testing in service

IEC 62353 applies to recurrent testing and to testing after repair or modification of medical electrical equipment. Where IEC 60601-1 is about design and type testing by the manufacturer, IEC 62353 is the practical method for a hospital workshop to confirm that a device in service remains safe.

Typical measurements include protective earth resistance, insulation resistance, equipment leakage current, patient leakage current and, where relevant, functional checks. The frequency should follow manufacturer guidance and a risk-based hospital policy. Record results and the instrument used.

Electrical safety testing of medical equipment in practice

A biomedical technician uses an electrical safety analyser with the right test sequence, inspects the device visually, checks cables and plugs, and measures the values required for the class and type of equipment. They compare readings with limits, record the outcome and label the device. A failed test means the device is taken out of service until corrected.

Perform these tests at acceptance, periodically during preventive maintenance, and after every repair that could affect safety. The biomedical engineering team is normally responsible.

What to ask suppliers for

Before purchase, ask the supplier for the test reports or certificates showing compliance with IEC 60601-1 and relevant particular standards, the applicable editions, the declaration of conformity and the manufacturer's recommended test procedure for in-service checks. Include these requirements in your tender specification and read what CE marking does and does not confirm.

Beware of vague statements such as 'tested to international standards'. Ask which standards, which edition and by whom, and verify the documentation matches the model you are buying.

Support from Beckfinity

Beckfinity provides compliance documentation and service instructions for the equipment we distribute. Contact our specialists if you need test procedures or standards information for your assets.