The power cord connectors are divided into "ten" connection, "one" connection, "ding" connection and so on. The joints should be tightly wound, smooth and without thorns. Before the thread end is disconnected, lightly press it with a wire cutter wire, then wrap it to the mouth, and then swing it left and right, and the thread end will be disconnected at the joint obediently. If the joint is in a dry place, first wrap two layers with insulating black cloth, then wrap two layers of plastic tape (also called PVC adhesive tape), and then wrap two or three layers with J-10 insulating self-adhesive tape stretched by about 200%. Finish with two layers of plastic tape. Because the direct use of plastic tape has many disadvantages: the plastic tape is prone to dislocation and separation after a long time; when the electrical load is heavy, the joint heats up, and the plastic electrical tape is easy to melt and shrink; It is easy to poke empty plastic tapes, etc. These hidden dangers directly endanger personal safety, cause short circuits or abnormalities in the circuit, and cause fires.
The above situation will not occur with the use of insulating black tape. It has a certain strength and flexibility, can be tightly wrapped around the joint for a long time, and will be fixed under the influence of time and temperature, will not fall off, and is flame retardant. Furthermore, wrapping it with insulating black tape and then wrapping it with tape can prevent moisture and rust.
However, the insulating self-adhesive tape also has defects. Although it is waterproof, it is easy to break, so it needs to be wrapped with two layers of plastic tape as a protective layer. The joint and the insulating self-adhesive tape of the joint are not sticky to each other, and the performance is better. Learn how to use electrical tape, use it correctly, prevent leakage and reduce hazards.