Which type of grid voltage is the lowest?

The choice of service equipment represents the lowest type of grid voltage among the options provided. Service equipment refers specifically to the components that deliver electricity from the distribution network to end-users, such as homes and businesses. This voltage level is typically lower, as it is meant for direct consumption by appliances and devices, usually in the range of 120 to 240 volts for residential systems.

In contrast, transmission voltage is designed for moving electricity over long distances and is typically much higher, often in the hundreds of thousands of volts to minimize energy losses during transport. Distribution voltage is also higher than service equipment voltage, as it steps down the transmission voltage for local use but is still designed to be higher than what is delivered directly to end consumers. Generation voltage can vary widely but generally starts off higher at the point of generation to facilitate the efficient transmission of electricity before it is stepped down for distribution.

Thus, service equipment operates at a level that is specifically designed for safe and efficient delivery to users, making it the lowest type of voltage in this context.