Which of the following is not a basic rule of electrical safety?

The reason why working by yourself is not considered a basic rule of electrical safety is that it can significantly increase the risk of accidents and reduce the effectiveness of emergency response. When working alone, there may be no one available to assist in case of an incident, which can be particularly dangerous in environments involving electricity where shock or injury is a possibility. Having a colleague or another person present can not only improve safety by providing assistance but also help in monitoring each other's work practices, ensuring compliance with safety protocols, and responding quickly to emergencies.

On the other hand, wearing rubber gloves, working in a dry area, and using insulated tools are all essential practices that help mitigate the risk of electrical shock or injury. Rubber gloves prevent electrical current from reaching the body, working in a dry area reduces the risk of slip hazards and conductivity, and insulated tools provide an additional layer of protection against accidental contact with live electrical parts. These practices are fundamental to ensuring a safe working environment when handling electrical equipment.