PVC electrical tape can withstand the temperature of 60 ℃-80 ℃, and it will soften and deform beyond this range;The self-adhesive rubber insulating tape can withstand high temperatures up to 200 °C.

Exposed wires in household low-voltage circuits can be wrapped with electrical tape after power failure;High-voltage wires must be insulated by professional electricians using high-voltage insulating tape.

Be sure to disconnect the power supply first when operating to ensure safety. After connecting the wire, tear off one end of the electrical tape and firmly stick it to the intact insulating skin behind the wire connector; Then properly tighten the tape, press it one loop at a time (covering about half the width of the previous loop) and wrap it tightly in the direction of the joint until all the exposed copper wires are completely wrapped; Check carefully after wrapping to see if the tape is wrapped tightly and firmly enough, and if any areas are loose or unwrapped.

The working principle of electrical tape is to use polyvinyl chloride film as the insulating substrate to block current conduction through its inherent electrical insulation properties. At the same time, the substrate is coated with rubber pressure-sensitive adhesive, and the wire joints are tightly wrapped with the help of the adhesion of the adhesive layer to form a physical isolation layer to prevent leakage or short circuit. Its insulation effect mainly depends on the insulation characteristics of the substrate and the sealing and wrapping properties of the adhesive tape.

Electrical tape does not have a self-healing function, so it needs to be replaced with a new tape and rewrapped after damage.