Electrical safety testing protects operators, end users, and everyone in between from unintended current flow that can cause injury or device malfunction. MiCOM Labs provides leakage current testing to verify that devices and electrical equipment meet the safety thresholds of IEC 60601-1, 62368-1, and 61010-1 before market entry.
Leakage current testing measures the electrical current that unintentionally escapes from a device’s normal circuit path. This current can flow through conductive surfaces, protective grounding systems, or directly through the body of a patient, operator, or end-user during device use.
The test determines whether current levels remain within acceptable safety limits under normal conditions and single-fault scenarios. Even microamp-level currents can disrupt cardiac function in vulnerable patients connected to medical equipment.
During electrical safety testing, technicians measure multiple types of leakage current to verify device safety.
Current flows from the device to protective earth through the grounding conductor
Current flows from accessible metal parts to earth when the ground connection fails
Current flows from the applied parts (components touching the patient) through the patient to earth
Current flows between the applied parts during normal operation
Medical electrical equipment must comply with IEC 60601-1 electrical safety requirements. The standard establishes maximum allowable leakage current limits based on device classification and operating conditions.
| Device Classification | Normal Condition | Single Fault Condition |
|---|---|---|
| Patient Care Devices | ≤ 100 µA | ≤ 500 µA |
| Type B Applied Parts | ≤ 100 µA | ≤ 500 µA |
| Type BF Applied Parts | ≤ 100 µA | ≤ 500 µA |
| Type CF Applied Parts | ≤ 10 µA | ≤ 50 µA |
Single-fault condition testing simulates scenarios in which a single protective measure fails, such as a disconnection of the ground conductor or an insulation breakdown.
IEC 62368-1 establishes touch current limits for ICT and audiovisual equipment to protect users from electrical shock during both normal operation and fault conditions.
| Measurement Type | Limit (Typical) |
|---|---|
| Touch Current (Normal) | ≤ 0.5 mA |
| Touch Current (Single Fault) | ≤ 1.0 mA |
IEC 61010-1 specifies allowable leakage and protective earth current levels to ensure safe operation of laboratory and measurement equipment in professional environments.
| Measurement Type | Limit (Typical) |
|---|---|
| Touch Current (Normal) | ≤ 0.5 mA |
| Touch Current (Single Fault) | ≤ 1.0 mA |
Leakage current testing follows a structured process to ensure medical devices meet electrical safety requirements.
| Testing Stage | What Happens | Purpose |
|---|---|---|
| Pre-Test Evaluation | Device classification determines applicable leakage current limits. Applied parts are categorized as Type B (general contact), Type BF (floating contact), or Type CF (cardiac contact). Engineers also identify conductive surfaces, applied parts, and signal I/O ports requiring measurement. | Ensures the correct limits and measurement points are defined before testing begins |
| Measurement Conditions | Testing is performed under both normal operating conditions and simulated fault scenarios. Normal tests verify leakage under standard operating conditions, while single-fault tests simulate failures such as ground disconnection, insulation breakdown, or reversed supply polarity. | Confirms device safety during both typical use and potential failure conditions |
| Acceptance Criteria | Test results are compared against IEC 60601-1 thresholds. Devices exceeding limits require design modifications such as improved insulation, better grounding, or additional protective barriers before retesting. | Verifies compliance with medical device electrical safety standards |
Get a detailed test plan for your device within 24 hours
Degraded or insufficient insulating materials allow excessive current flow between live circuits and accessible parts.
Missing ground connections or high-resistance ground paths prevent safe dissipation of current.
Capacitor deterioration or wire insulation breakdown increases leakage over the device lifecycle.
Field repairs or unauthorized design changes can compromise electrical isolation.
Medical devices that come into direct patient contact require additional protective measures beyond basic electrical safety.
Understanding applied part classifications helps ensure medical equipment meets strict electrical safety standards.
| Applied Part Classification | Description |
|---|---|
| Type B Applied Parts | Provide basic protection for general patient contact applications, and can tolerate higher leakage currents than cardiac-specific equipment |
| Type BF Applied Parts | Electrically isolated (floating) applied parts that provide enhanced protection against electrical shock |
| Type CF Applied Parts | Cardiac-floating applied parts are designed for direct cardiac contact with the strictest leakage current limits to prevent cardiac disruption |
Devices must incorporate one or more protective measures:
| Applied Part Classification | Description |
|---|---|
| Type B Applied Parts | Provide basic protection for general patient contact applications, and can tolerate higher leakage currents than cardiac-specific equipment |
| Type BF Applied Parts | Electrically isolated (floating) applied parts that provide enhanced protection against electrical shock |
| Type CF Applied Parts | Cardiac-floating applied parts are designed for direct cardiac contact with the strictest leakage current limits to prevent cardiac disruption |
Identify electrical safety risks before formal testing begins
Comprehensive evaluation performed on representative samples during device development. Type testing validates that the design meets all IEC 60601-1 electrical safety requirements.
Production-line testing is performed on every manufactured unit. Routine tests verify that safety features remain effective throughout manufacturing.
| Test Type | Frequency | Purpose |
|---|---|---|
| Type Testing | Design validation | Comprehensive safety verification |
| Routine Testing | Every unit | Manufacturing quality control |
| Periodic Testing | Annual or after modification | Ongoing compliance verification |
Manufacturers must monitor devices in clinical use. Periodic retesting verifies that safety performance remains consistent over the expected service life.
Temperature, humidity, and altitude affect electrical safety performance across medical, laboratory, and ICT equipment. Testing accounts for environmental variations to ensure devices remain safe under real-world operating conditions defined by standards such as IEC 60601-1, IEC 61010-1, and IEC 62368-1.
| Category | Details | Purpose |
|---|---|---|
| Environmental Factors | Temperature, humidity, and altitude can affect electrical safety performance during clinical, laboratory, and general equipment use | Ensures testing reflects real-world operating conditions across multiple standards |
| Standard Test Conditions | Ambient temperature: 15°C–35°C; Relative humidity: 45%–75%; Atmospheric pressure: 86 kPa–106 kPa (aligned with IEC 60601-1, IEC 61010-1, and IEC 62368-1 baseline conditions) | Provides controlled conditions for consistent and repeatable testing across standards |
| Conditioning Requirements | Devices undergo humidity conditioning before dielectric strength testing to stress insulation systems (commonly required in IEC 60601-1 and IEC 61010-1, with similar stress testing principles applied in IEC 62368-1) | Verifies insulation reliability under elevated humidity and environmental stress conditions |
Leakage current testing forms part of a comprehensive electrical safety evaluation.
Verifies insulation can withstand high-voltage stress without breakdown.
Measures the continuity of the grounding system to ensure effective fault-current dissipation.
Evaluates insulation integrity under low voltage before applying dielectric strength tests.
Confirms adequate spacing between conductive parts at different potentials.
IEC 60601-1 requires risk-based approaches aligned with ISO 14971 medical device risk management standards. Electrical safety testing provides objective evidence that hazards are controlled to acceptable levels.
Leakage current testing forms part of a comprehensive electrical safety evaluation.
After implementing protective measures, residual risk must fall within acceptable thresholds. Leakage current testing quantifies remaining risk levels.
MiCOM Labs is an A2LA-accredited testing laboratory (ISO/IEC 17025) providing compliance testing for manufacturers bringing products to global markets. Our testing capabilities support electrical safety evaluation requirements for regulatory submissions.
| Category | Details |
|---|---|
| Accreditations | ISO/IEC 17025 (Testing Laboratory); ISO/IEC 17065 (Certification Body) |
| Service Approach | We work alongside product engineers to identify testing requirements and execute evaluation programs. Automated platforms provide real-time project status throughout the testing cycle. |
Electrical safety requirements vary by market. We maintain expertise in regulatory frameworks across North America, Europe, Asia-Pacific, and other regions to support your market access strategy.
| Market Category | Countries / Regions |
|---|---|
| Direct Certification Markets | United States (FCC), Canada (ISED), European Union (CE), United Kingdom (UKCA), Japan (MIC) |
| Testing Authority Markets | Australia, Taiwan, Hong Kong, Malaysia, South Korea, Singapore, Vietnam, Mexico, New Zealand |
| Coordination Markets | All other countries require local testing partnerships |
Reports must demonstrate compliance with applicable standards and provide traceability to the calibration of measurement equipment.
The following industries commonly require leakage current testing for both safety and performance assurance.
| Industry | Examples of Equipment |
|---|---|
| Medical Devices |
|
| Healthcare Facilities |
|
| Laboratory Equipment |
|
| Home Healthcare Devices |
|
Contact our testing team to discuss your device requirements
