Which type of insulation is used to cover electrical systems?

Electrical insulation tape is specifically designed for use in covering electrical systems. It serves an essential function in ensuring safety by insulating wires and connections, preventing electrical shocks, and protecting against short circuits. This type of tape is made from materials that can withstand high voltage and resist the flow of electricity, making it a crucial component in electrical work.

In contrast, the other types of insulation mentioned, such as fiberglass, cellulose, and foam board, are primarily used for thermal insulation in buildings rather than for insulating electrical conductors or connections. These materials provide effective barriers to heat loss but do not serve the same purpose in terms of electrical safety and functionality as electrical insulation tape does. Therefore, the correct answer focuses on the particular requirements and applications involved in electrical systems.