


IEC 62368-1 Clause 4.7 Plug Torque Tester
Plug Torque Tester is designed for IEC 62368-1 Clause 4.7 torque testing of plug-in equipment and fixed socket outlets. Also known as a Plug Torque Force Test Apparatus, it helps evaluate whether plug-in devices apply excessive mechanical stress to the socket outlet during normal use.
Standard Compliance: Designed to support IEC 62368-1 Clause 4.7 plug torque testing
Related Standards: IEC 60884-1, IEC 60335-1 and IEC 60065 related applications
Test Function: Measures torque applied by plug-in equipment to fixed socket outlets
Torque Range: 0.25 N·m to 0.4 N·m typical configuration
Test Weight: 2.5 N weight
Eccentricity Distance: 8 mm reference distance
Socket Configuration: Universal, UL and European socket options
Structure: Single-station benchtop mechanical apparatus
MOQ: 1 set
Delivery Time: 15 working days
IEC 62368-1 Clause 4.7 Plug Torque Tester Description
IEC 62368-1 Clause 4.7 Plug Torque Force Test Apparatus 0.25 & 0.4 N.M
The Plug Torque Tester is a mechanical test apparatus used to evaluate the torque applied by plug-in equipment to fixed socket outlets. It is intended for products fitted with plug pins, especially devices that may rely on the socket outlet for mechanical support.
During testing, the specimen is inserted into the appropriate fixed socket. The apparatus uses a balancing arm and test weight to determine whether the torque applied to the socket remains within the requirement of IEC 62368-1 Clause 4.7 or related plug safety standards.
This Plug Torque Force Test Apparatus provides a repeatable setup for manufacturers, third-party testing laboratories and compliance departments performing plug torque verification for adapters, power supplies, AV/ICT equipment, household appliances and plug-in devices.
Technical Parameters
| Parameter | Specification | Remark or Notes |
|---|---|---|
| Product Name | Plug Torque Tester | Also known as Plug Torque Force Test Apparatus |
| Main Standard | IEC 62368-1 Clause 4.7 | Plug-in equipment torque evaluation |
| Related Standards | IEC 60884-1, IEC 60335-1, IEC 60065 | Related plug torque test applications |
| Test Object | Plug-in equipment and fixed socket outlets | For products fitted with plug pins |
| Test Station | Single station | Benchtop mechanical test setup |
| Specimen Eccentricity | 8 mm reference distance | Distance from contact surface reference position |
| Test Weight | 2.5 N | Used for torque generation |
| Torque Range | 0.25 N·m to 0.4 N·m typical configuration | Confirm according to selected configuration |
| Balancing Arm | Adjustable balancing arm | Typical configuration subject to final model |
| Torque Calculation | Weight × arm length | Example: 2.5 N × 100 mm = 0.25 N·m |
| Socket Configuration | Universal socket, UL socket, European socket | Selected according to plug type and test requirement |
| Installation | Benchtop use | For laboratory and compliance testing environments |
| Packaging | Carton box | Standard packaging |
| Delivery Period | 15 days | Subject to order confirmation |
Common Error Mitigation
Incorrect socket selection may affect test reliability. Before testing, confirm that the socket configuration matches the plug type, target market and applicable standard requirement. The 8 mm reference distance, socket mounting position and balancing arm alignment should be checked before each test. Incorrect alignment may change the torque applied during testing.
Weights, arm movement and rotating components should be inspected regularly. Excessive friction, looseness or deformation may affect torque application and reduce result repeatability.
Testing Principle
The test sample is inserted into a fixed socket outlet mounted on the apparatus. The socket and sample are arranged so that the torque generated by the plug-in equipment can be evaluated around the specified reference position.
A balancing arm and test weight are used to determine the additional torque required to keep the socket engagement face in the required position. If the measured torque is excessive, the product may impose unacceptable mechanical stress on the fixed socket outlet.
This test is especially relevant for plug-in power supplies, adapters and equipment that are supported directly by their plug pins when connected to a socket outlet.
Applications and Use Cases

The IEC 62368-1 Clause 4.7 Plug Torque Tester is used by electrical safety laboratories, manufacturers and quality inspection organizations for plug torque verification.
Typical applications include:
- IEC 62368-1 Clause 4.7 plug torque testing
- Plug-in power supply and adapter torque evaluation
- AV/ICT equipment plug safety verification
- Fixed socket outlet mechanical stress assessment
- Household appliance plug torque testing under related IEC 60335-1 applications
- Plug and socket-outlet testing under related IEC 60884-1 applications
- Pre-compliance design verification before certification submission
- Routine quality control for plug-in product structures
Key Advantages
The Plug Torque Tester provides a dedicated mechanical setup for evaluating torque applied by plug-in equipment to fixed socket outlets. It supports repeatable IEC 62368-1 Clause 4.7 plug torque testing without complex electrical measurement.
The apparatus uses a weight and balancing arm structure to generate and evaluate the required torque condition. Universal, UL and European socket options allow users to configure the setup according to plug type and target market.
Its single-station benchtop structure is suitable for compliance laboratories, manufacturer quality departments and product development teams performing routine plug torque verification.
Compliance & Regulatory Assurance
This Plug Torque Force Test Apparatus is designed to support torque testing according to IEC 62368-1 Clause 4.7. It helps manufacturers verify whether plug-in equipment applies excessive mechanical stress to fixed socket outlets.
Metrological Integrity & Validation
- Regular verification of the balancing arm length, weight value and rotation mechanism is recommended.
- Periodic inspection of socket fixtures, mounting alignment and mechanical friction helps maintain test reliability.
- Proper setup, stable mounting and correct socket selection support consistent plug torque force testing results.
Download Product Documentation
Technical Inquiry & Expert Support
KingPo supplies IEC 62368-1 Clause 4.7 Plug Torque Tester for plug-in equipment and fixed socket outlet torque evaluation. Our team can provide guidance on test setup, socket configuration and standard application.
For technical specifications or quotations, please contact us with your applicable standard, plug type, socket requirement and expected test configuration.
IEC 62368-1 Clause 4.7 Plug Torque Tester
IEC 62368-1 Clause 4.7 Plug Torque Tester FAQs
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