62303-2 Connectors, Interconnects

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62303-2 is the internationally recognized standard for magnetic wire connectors and terminal devices, which are commonly used in industrial wiring applications. It is designed to ensure the safety, reliability, and compatibility of the terminal and the wire conductors that are connected with it.

The 62303-2 standard was developed by the International Electrotechnical Commission to define the performance requirements and safety aspects for various wire connectors and terminals in industrial and commercial applications. It outlines the testing, inspection, installation, and operation requirements for various equipment, such as switches, relays, surge suppressors, circuit breakers, and timer relays. It also details various wire conductor sizes and their rated voltage, which is essential in ensuring the safety and reliability of the wire conductor connection.

The 62303-2 standard specifies the following performance requirements pertaining to safety, reliability, and compatibility:

• The terminal must be capable of withstanding short-circuit and overload current, as well as have adequate creepage and mechanical strength.
• Wire holders and contacts must be able to maintain contact with the wire conductor surface without any deformation or damage.
• The terminal should not generate any electric arcs or sparks, that may pose a safety hazard or lead to insulation breakdown.
• The terminal must provide reliable electrical connection under normal operating conditions.
• The terminal must be compatible with the associated protection device, such as over-voltage, over-current, or arc-fault devices.

In addition, the 62303-2 standard specifies the following working principles:

• The terminal must allow easy insertion and removal of the wire conductor and must also be able to accept the desired gauge of the wire.
• The terminal must ensure correct electrical connection between the wire conductor and the terminal.
• The terminal must provide secure mechanical connection between the wire conductor and the terminal.
• The terminal must prevent movement of the wire conductor and prevent accidental disconnection under normal operating conditions.
• The terminal must provide clear visual indication when the wire conductor is correctly connected to the terminal.

The 62303-2 standard covers various types of terminals, such as terminal blocks, terminal strips, terminal plates, terminal boards, push-in connectors, screw-type connections, crimp terminals, pluggable connectors, and soldering terminals. It provides detailed diagrams and instructions to ensure proper installation and maintenance of each type of terminal.

The 62303-2 standard is essential for ensuring the safety, reliability, compatibility, and performance of the various wire connectors and terminals utilized in industrial and commercial applications. It helps to ensure that wire connectors are properly tested and inspected for any abnormality, and that the wiring design ensure the safety of personnel and devices in the area.

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