Information technology equipment safety testing verifies that computers, networking devices, displays, and power electronics meet international safety requirements before entering global markets. Based primarily on IEC 62368-1 and its regional equivalents, these evaluations assess electrical shock, fire, thermal, and mechanical hazards through standardized laboratory testing. This guide explains the applicable standards, sample categories, test items, test methods, and certification pathways for IT equipment safety compliance.
Technical Overview
Information technology equipment (ITE) safety testing is a systematic engineering evaluation that verifies whether a product's design, construction, and performance adequately protect users, service personnel, and property from hazards such as electric shock, excessive energy, fire, thermal injury, mechanical injury, and radiation. The testing is performed against internationally recognized safety standards, historically IEC 60950-1 for information technology equipment, and today IEC 62368-1, which consolidated the former ITE and audio/video standards (IEC 60950-1 and IEC 60065) into a single hazard-based framework.
IEC 62368-1 adopts the methodology of Hazard-Based Safety Engineering (HBSE). Rather than prescribing fixed construction rules for each product category, the standard requires manufacturers to identify energy sources, classify them by severity (electrical ES1/ES2/ES3, power PS1/PS2/PS3, thermal TS1/TS2/TS3, mechanical MS1/MS2/MS3, and radiant RS1/RS2/RS3), and then demonstrate that appropriate safeguards, such as insulation, protective earthing, enclosures, and protective components, separate people from those energy sources during normal operation, abnormal operation, and single-fault conditions.
Regional adoptions of the standard include EN IEC 62368-1 for the European Union under the Low Voltage Directive (2014/35/EU), UL 62368-1 for North America, GB 4943.1 for China under the CCC certification framework, and JIS C 62368-1 for Japan. Compliance is typically demonstrated through type testing at accredited third-party laboratories, followed by routine production-line safety tests and periodic factory verification. Electromagnetic compatibility requirements, such as those in the CISPR 32 and IEC 61000 series, are assessed separately from product safety.
Testing Samples
Computing and Data Processing Equipment
This category includes desktop computers, laptops, tablets, workstations, servers, blade systems, and data storage arrays. Evaluations focus on power supply integration, internal wiring, battery systems, service accessibility, and thermal management under continuous high load, reflecting the operating profiles of enterprise and consumer computing hardware.
Network and Communication Equipment
Routers, Ethernet switches, modems, gateways, wireless access points, optical network terminals, and Power-over-Ethernet (PoE) devices are assessed for the combined hazards of mains supply, telecommunication network voltages, and PoE power delivery. Particular attention is given to isolation between telecommunication ports and the mains circuit, since network cabling frequently extends into uncontrolled environments.
Displays and Peripheral Devices
Monitors, projectors, printers, scanners, and multifunction peripherals are tested for accessible surface temperatures, laser radiation where applicable, moving mechanical parts, and the fire behavior of housings containing high-power imaging or lamp systems.
Power Supplies and Conversion Equipment
External power adapters, battery chargers, internal power supply units, and uninterruptible power systems (UPS) represent a major share of ITE safety testing. These products concentrate on transformer and switching-circuit safety, output energy classification, fault tolerance, and component flammability.
Retail, Self-Service, and Converged Devices
Point-of-sale terminals, self-service kiosks, digital signage, set-top boxes, and smart home hubs combine computing, display, audio, and connectivity functions in publicly accessible installations, requiring evaluation of both operator and bystander safety scenarios.
Testing Items
A complete ITE safety evaluation covers electrical, thermal, fire, mechanical, and marking requirements. Typical test items include:
- Electric strength (dielectric withstand, or hipot) testing of basic, supplementary, and reinforced insulation
- Insulation resistance measurement at a specified DC test voltage
- Touch current and protective conductor current measurement
- Capacitor discharge testing of mains plugs after disconnection from supply
- Protective earth continuity (ground bond) testing for Class I equipment
- Verification of energy source classification limits for voltage, current, stored charge, and power
- Clearance and creepage distance measurement between circuits of different hazard levels
- Accessibility testing of hazardous live parts and moving parts using standardized test probes and test fingers per IEC 61032
- Heating tests under normal operating conditions at rated voltage and maximum normal load
- Abnormal operating tests, such as blocked ventilation, fan stall, motor stall, and output overload
- Single-fault condition testing, including component short circuits and open circuits, transformer overload, and failure of protective devices
- Mechanical strength tests, including impact, steady force, drop, stability, and wall-mounting security
- Flammability evaluation of plastics and printed wiring boards, including material classifications such as V-0, V-1, and HB
- Fire enclosure verification using needle flame and glow wire methods from the IEC 60695 series
- Marking legibility and durability testing, including rubbing tests with water and petroleum spirit
- Review of markings, ratings, warnings, and installation instructions for completeness and correctness
Testing Methods
Electric Strength (Hipot) Testing
Dielectric withstand testing applies a high voltage between primary (mains) circuits and accessible secondary or earthed parts to verify insulation integrity. For equipment rated up to 250 V mains, typical type-test levels are 1500 V AC for basic insulation and 3000 V AC for reinforced insulation, maintained for 60 seconds. Equivalent DC voltages may be applied. The sample passes if no breakdown or flashover occurs and monitored current remains below the instrument trip threshold. Production-line versions shorten the duration to one or two seconds, often with a proportionally increased test voltage, in accordance with the routine test requirements of the standard.
Insulation Resistance and Touch Current Measurement
Insulation resistance is commonly measured at 500 V DC, with acceptance values of at least 2 MΩ for basic insulation in most applications. Touch current is measured using a calibrated measuring network that simulates human body impedance, as defined in IEC 60990, connected between accessible parts and earth. For classification as energy source ES1, alternating touch current is generally limited to 0.5 mA rms, with higher permitted levels only where protective earthing or other additional safeguards exist, such as up to 3.5 mA protective conductor current under defined conditions for Class I equipment. Capacitor discharge testing additionally confirms that the voltage across mains plug pins decays to 60 V or less within the specified time after disconnection.
Protective Earth Bond Testing
For Class I equipment, the protective earth path is stressed with a high current, typically 25 A or a multiple of the rated current from a low-voltage source not exceeding 6 V, applied between the earth pin and each accessible metal part. The resistance of the bonding path must not exceed 0.1 Ω for equipment with detachable power cords, ensuring that the protective conductor can carry fault current until the protective device operates.
Heating, Abnormal, and Fault Condition Testing
Temperature rise testing is performed at rated supply voltage, and where required at plus or minus 10 percent of rated voltage, under the maximum normal load, using thermocouples on windings, semiconductor heatsinks, transformer cores, and accessible surfaces. The resistance-change method is used for winding temperature determination. Insulation system limits follow material classes, and accessible surface temperatures must remain below burn-threshold limits. Abnormal and single-fault tests then deliberately create adverse conditions, such as stalled fans, blocked vents, shorted rectifiers, and overloaded transformers, to confirm that no fire, electric shock, or energy hazard results even when safeguards or components fail.
Mechanical Strength and Flammability Testing
Mechanical evaluations include steady-force tests applied at defined force levels, impact tests using a steel ball or spring hammer, drop tests for portable equipment typically from about 1 m onto a hard surface, tilt and stability tests, and mounting hardware security tests. Fire hazard evaluation combines material preselection, where enclosure and PCB materials are qualified to flammability classifications per IEC 60695-11-10, with end-product verification using needle flame testing per IEC 60695-11-5 and glow wire testing per the IEC 60695-2 series. Together these methods confirm that the fire enclosure contains or prevents ignition under fault conditions.
Applications
ITE safety test reports and certificates underpin nearly every route to market for electronic products. In the European Union, compliance with EN IEC 62368-1 supports CE marking under the Low Voltage Directive; similar frameworks support UKCA marking in Great Britain. In North America, certification to UL 62368-1 through accredited third-party laboratories enables listing marks required by retailers, inspectors, and authorities having jurisdiction. In China, products in the applicable catalog must comply with GB 4943.1 under CCC certification, while Japan accepts conformity based on JIS adoptions of the standard.
Beyond market access, the IECEE CB Scheme allows a single test report issued by a national certification body member to be leveraged toward national certifications in dozens of participating countries, significantly reducing duplicated testing for global manufacturers. During product development, design-phase and pre-compliance safety testing identify insulation, creepage, thermal, and flammability issues early, when corrections are least costly. In mass production, routine 100 percent hipot, ground bond, and functional tests, supported by periodic factory inspections, ensure that every manufactured unit continues to match the certified safety design.
FAQ
What is information technology equipment safety testing?
It is a standardized laboratory evaluation that verifies whether IT and communication technology products protect users and property from electric shock, energy, fire, thermal, mechanical, and radiation hazards under normal, abnormal, and single-fault conditions, in accordance with standards such as IEC 62368-1 and its regional equivalents.
Which standard applies to my product, IEC 60950-1 or IEC 62368-1?
IEC 60950-1 has been superseded. New certifications for IT, communication, and audio/video equipment are now conducted under IEC 62368-1, EN IEC 62368-1, UL 62368-1, GB 4943.1, or JIS C 62368-1. Existing IEC 60950-1 certificates have largely expired, so legacy products often require re-evaluation to the current standard before renewal or market re-entry.
What is the difference between type testing and routine production testing?
Type testing is a comprehensive one-time evaluation of a product design at an accredited third-party laboratory, covering electrical strength, heating, fault conditions, mechanical strength, and construction review. Routine testing is a simplified set of checks, typically hipot, ground bond, and functional tests, performed on 100 percent of units on the production line to confirm workmanship.
Are ITE safety tests destructive?
Some tests, particularly abnormal operating, single-fault, mechanical impact, and drop tests, can damage or destroy samples. For this reason, laboratories usually request several units: typically two to four samples for non-destructive evaluation plus additional samples dedicated to destructive test sequences.
How long does safety testing take?
A full type-test project under IEC 62368-1 generally requires four to eight weeks, depending on product complexity, test scope, and the completeness of technical documentation. Well-prepared documentation, including circuit diagrams, critical component certificates, insulation diagrams, and material flammability data, can significantly shorten the schedule.
What is the CB Scheme and how does it help?
The CB Scheme is a multilateral agreement administered under the IEC System for Conformity Assessment. A CB Test Certificate based on IEC 62368-1 testing can be converted into national certifications in many member countries with minimal additional testing, streamlining global market access for IT equipment manufacturers.
Do I need to re-test if I change the design after certification?
Any change affecting safety-relevant aspects, such as the power supply, insulation system, enclosure material, protective components, or layout, must be assessed for compliance. Minor changes may only require document review or targeted delta testing, while significant modifications can trigger a partial or full re-evaluation to maintain the validity of the certification.