The voltage commonly supplied to a residence by the local utility is

The voltage commonly supplied to a residence by the local utility is

• A. 120V
• B. 240V
• C. 277V
• D. 120V/240V

Answer: (D)

Residential service is provided as two hot conductors with a neutral, giving 240 V between the hot legs and 120 V from each hot to neutral. That setup lets homes run high-power 240 V appliances while also supplying standard 120 V outlets and lighting. So the commonly supplied residential voltage is 120/240 V. The 277 V option isn’t used in typical homes (it's for some commercial lighting on different systems). A single 120 V or a standalone 240 V description doesn’t capture the full residential service.

Residential service is provided as two hot conductors with a neutral, giving 240 V between the hot legs and 120 V from each hot to neutral. That setup lets homes run high-power 240 V appliances while also supplying standard 120 V outlets and lighting. So the commonly supplied residential voltage is 120/240 V. The 277 V option isn’t used in typical homes (it's for some commercial lighting on different systems). A single 120 V or a standalone 240 V description doesn’t capture the full residential service.