Field wiring
The use of pre-assembled plug-in connectors or folding seals on the distribution boxes completes the overall package. This enables a simple, uncomplicated and error-free connection in the field.
Wiring and welding terminals in the distribution box
Proper wiring and welding of terminals in a distribution box ensures safe, reliable, and compliant electrical connections.Wire PreparationBefore connecting wires, always turn off the main power to prevent electrical shock . Strip the insulation from the wire ends using a special stripping tool, ensuring the copper core is not damaged and the cut is flat . For small single-core wires (e.g., BV-3 * 2.5), terminals may not be required, but multi-stranded flexible wires (BVR) should be connected using metal sleeves or terminals .Types of TerminalsCrimped Terminals (Wire Noses): Used for multi-stranded wires to ensure a secure connection to switches or equipment .Welding Terminals: For large cross-section conductors, copper or aluminum welding terminal blocks are used to provide a solid, permanent connection .Pressing Terminals: Cold-press terminals are used for reliable connections without soldering, suitable for control circuits and smaller wires .Terminal InstallationSelect the correct terminal based on wire size and type. Ring terminals are preferred for main circuits, while fork terminals can be used for control circuits .Crimping: Use a special terminal crimping plier to ensure the wire and terminal are in solid contact .Welding: For high-current or large conductors, solder or weld the terminal, then protect the joint with a heat-shrinkable tube .Insertion: Insert the terminal fully into the component or terminal block, maintaining a flat contact and proper alignment (angle ≤ 5°) .Securing: Tighten screws to the recommended torque to prevent loose connections .Wiring LayoutFollow the shortest path for wires to reduce resistance and avoid interference .Keep wires flat, relaxed, and free from tension in the cable grooves .Separate main circuits from control circuits to prevent voltage interference .Label all wires and terminals for easy identification and future maintenance .Safety and ComplianceEnsure the distribution box is properly grounded and installed in a dry, accessible location .Use UL/CE-certified components and follow local electrical codes .Perform visual inspections and multimeter tests before powering on .Schedule regular maintenance to check for loose connections or damaged terminals . By following these steps, wiring and welding terminals in a distribution box can be performed safely, efficiently, and in compliance with electrical standards, ensuring long-term reliability and protection against short circuits or fire hazards.
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Welding
Terminals
Distribution
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The installation requirements for the distribution box
PDF file
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