What is the maximum allowable voltage for electrical services defined within the IRC?

The maximum allowable voltage for electrical services defined within the IRC is established to ensure safety and compatibility with residential electrical systems. In the context of the International Residential Code (IRC), 240 volts is significant because this voltage level is commonly used for residential electrical services and appliances. This voltage is sufficient for standard residential needs while also being manageable in terms of safety regulations and wiring requirements.

When designing or inspecting electrical systems, understanding the limits set by the IRC is crucial for ensuring that installations meet both functionality and safety standards. The selection of 240 volts as a maximum helps to mitigate risks associated with higher voltages, such as increased electric shock hazards and the need for more complex protective equipment. This balance between safety and practicality makes 240 volts the standard for many residential applications.