1，Insulated black tape, this kind of tape can only act as insulation, but it can not act as a flame retardant, nor can it be waterproof, so now this kind of tape is used less and less, only individual civil electrical use.

2, PVC electrical flame retardant tape, this kind of tape not only can play the role of insulation, but also can play the role of flame retardant waterproof. However, it is made of PVC materials, so it is not very malleable, in the joint area can not be wrapped very tightly, so sometimes water will still go in, but this kind of tape is now used very much.

3, high pressure self-adhesive tape, most of this kind of tape is used in some places where the voltage is relatively high, because this kind of tape is very malleable, and it is also better than PVC tape in terms of water resistance. Therefore, there are still some places where the voltage is relatively small. However, because its strength is worse than that of PVC tape, these two kinds of tape are often used together.