IBEW Electrical Practice Test 2025 – Complete Exam Preparation

The typical voltage for residential electrical systems in the United States is 120/240 volts. This standard provides household circuits with 120 volts for common appliances and outlets, while larger appliances, such as dryers and ovens, often require 240 volts. The 120 volts is used for most lighting, outlets, and devices, allowing for safe and effective operation within homes. The 240 volts is primarily utilized for heavier electrical loads.

This system is rooted in historical practices and current safety standards, ensuring compatibility with most residential appliances. The other options do not accurately reflect the standard voltage levels used in American homes; therefore, they are not considered typical or widely applicable in current residential electrical systems.