Electrical Safety Testing

Scope

Electrical safety testing covers the standard suite of tests that verify a product’s protection against electric shock and fire hazards, performed against the applicable regional and product-specific safety standards. The specific tests and limits depend on the product type and the standard it must meet.

The core tests typically include:

• Dielectric strength (hipot / high-potential) – a high voltage is applied between live parts and accessible conductive parts to confirm the insulation withstands voltage stress without breakdown
• Insulation resistance – measures the resistance of the insulation between live parts and accessible parts to confirm it is adequately high
• Ground bond / earth continuity – verifies a low-resistance connection between the protective earth terminal and accessible conductive parts, ensuring fault current has a safe path
• Leakage current – measures the current that flows to earth or through an accessible part under normal and single-fault conditions, confirming it stays within safe limits (particularly critical for medical equipment)
• Power input / functional checks – verification of rated power, input current, and related electrical parameters as required by the standard
• Applicable standards – including the IEC/EN 60950 and 62368 series (IT/AV equipment), IEC 60601-1 (medical electrical equipment), IEC/EN 61010 (laboratory equipment), IEC 60335 (household appliances), and UL and CSA equivalents for North America

Applications

• Consumer electronics and appliances – verifying safety of household appliances, consumer electronics, power supplies, and chargers against the applicable household/IT safety standards
• Medical electrical equipment – electrical safety testing per IEC 60601-1, where leakage current limits are especially stringent because equipment contacts patients
• IT and AV equipment – safety verification of information technology and audio/video equipment under the IEC/EN 62368 framework
• Industrial and laboratory equipment – testing of control equipment, instruments, and laboratory devices per IEC/EN 61010 and related standards
• Power supplies and components – dielectric and leakage verification of transformers, power supplies, and components that provide isolation
• Production-line testing – routine hipot and ground-bond checks on every unit during manufacturing to catch insulation or grounding defects introduced in assembly
• Design validation and certification – confirming a product’s electrical safety during development and as part of the data needed for safety certification and market access

Benefits

• Directly addresses shock and fire hazards – the test suite verifies the specific protections (insulation, grounding, controlled leakage) that prevent the two primary electrical hazards to users
• Required for market access – electrical safety verification against the applicable standard is a prerequisite for selling electrical products in essentially every regulated market
• Catches both design and manufacturing defects – type testing confirms the design is safe, while production-line hipot and ground-bond testing catches unit-to-unit defects introduced during assembly
• Covers products across all major sectors – the same core test disciplines underpin safety standards for consumer, medical, IT, industrial, and laboratory equipment
• Reduces liability and field-safety risk – verifying electrical safety before products reach users reduces the risk of shock/fire incidents, recalls, and the associated liability