What is the minimum service rating in amps required for a single residential dwelling unit?

The minimum service rating in amps required for a single residential dwelling unit is 100 amps. This standard ensures that a typical home has sufficient electrical capacity to safely power essential systems such as lighting, appliances, heating, and cooling systems. The 100-amp service is considered the baseline for adequate electrical supply in most single-family homes, accommodating the electrical needs of modern amenities and technologies.

Choosing a service rating below 100 amps, like 50 or 75 amps, could lead to insufficient power supply, causing circuit overloads or frequent tripping of breakers, which jeopardizes the safety and functionality of the home. While 125 amps provides extra capacity for larger homes or homes with higher electrical demands, the minimum requirement is still set at 100 amps to promote safety and efficiency in residential wiring systems.