There are two methods for connecting single-strand copper conductors: twisting method and wrapping method. For conductors with smaller cross-sections, the twisting method is generally preferred; for those with larger cross-sections, the wrapping method is more commonly used due to the difficulty of twisting.
I. Twisting Method
For straight connection of waterproof joints: first twist the conductors around each other 3 times, then tightly wrap each end around the other conductor 5 times. Cut off the excess wire and ensure the end is closely attached to the conductor. During twisting, you can first roughly twist the branch wire around the main wire 1-2 times by hand, then use wire pliers to wrap it tightly 5 times, and cut off the excess. The twisting method for single-core copper conductors includes direct connection and branch connection.
II. Wrapping Method
For direct connection of cable joints: first bend the two wire ends slightly with pliers, align them together, and place an auxiliary wire of the same cross-section in the middle. Then use a bare copper wire with a diameter of approximately 1.5mm to tightly wrap the combined part of the conductors. The wrapping length is about 10 times the diameter of the conductor. For branch connection: first bend the branch wire at a right angle and slightly bend its end, then align the two wires, and tightly wrap them with bare copper wire with the same wrapping length as the straight connection.
