Evolution of Copper Braided Flexible Connectors Crossover Specification and Analysis of Industry Application Requirements

Copper Braided Flexible Connectors, as a traditional flexible conductive connector, has been widely used in the grounding and cross connection scenarios of distribution box doors. With the continuous upgrading of electrical construction safety standards, relevant industry standards have made targeted adjustments to the conductive connection materials for distribution box door cross connections, clarifying technical requirements at different stages and providing clear guidelines for the standardization and safety of electrical construction.

Braided Flexible Busbar, with its flexible conductive properties, became a commonly used material for grounding and bridging of early distribution box doors, and has a clear industry standard basis. In Article 8.1.13 of the old version JGJ46-2005 "Technical Code for Safety of Temporary Electrical Use on Construction Sites", it is explicitly stipulated that metal box doors and metal boxes can be electrically connected through braided soft copper wires. This provision has also made Braided Copper Wire a common choice for grounding and bridging of distribution box doors in temporary electrical arrangements at various construction and municipal engineering sites.

The current industry standards provide specific and clear technical requirements for the grounding cross connection construction of distribution box doors, and strictly define the types and specifications of connection materials. Braided Copper Bus Bar Heat Sink PVC Sleeves are no longer suitable for grounding cross connection construction in this scenario. JGJ46-2024 "Technical Standard for Safety of Temporary Electrical Use on Construction Sites of Buildings and Municipal Engineering" stipulates that metal box doors and metal boxes should be electrically connected using yellow/green combination color soft insulated wires; Article 5.1.1 of GB 50303-2015 "Code for Acceptance of Construction Quality of Building Electrical Engineering" further clarifies that a yellow green insulated copper core flexible wire with a cross-sectional area of not less than 4mm ² must be used to connect the grounding terminals between the box door and the metal frame, and the connection part must be clearly marked, completely replacing the original requirements for the use of Flat Copper Braides and ensuring that the construction quality meets the requirements of the specifications.

The upgrading and adjustment of the specifications related to the cross connection of distribution boxes is an important manifestation of the improvement of safety standards in the electrical construction industry. The core is to replace the original use of Soft Bare Copper Wires with standardized material selection requirements, improve the reliability of electrical system grounding cross connection, and ensure overall construction safety. For the electrical construction industry, this adjustment requires the construction party to strictly follow the current regulatory requirements, accurately select jumper materials that meet the specifications, and abandon the application of Soft Copper Tinned Wires in the jumper connection of distribution box doors. In actual construction, it is necessary to ensure that the cross-sectional area of the jumper wire meets the standard, and it is firmly connected to the grounding terminal. At the same time, color differentiation and labeling should be done well, and the construction quality should be fully inspected to ensure the standardization of the grounding jumper connection of the distribution box from the perspective of construction details, in line with the overall requirements of safe construction in the industry.

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