Residential customers are normally provided with ______ voltage, ______-phase service.

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Multiple Choice

Residential customers are normally provided with ______ voltage, ______-phase service.

Residential service in most areas uses a split-phase single-phase system. A center-tapped transformer provides two hot conductors that are 180 degrees apart. Any one hot to neutral gives about 120 volts, while the voltage between the two hot conductors is about 240 volts. This setup powers everyday outlets at 120 V and larger appliances at 240 V, all within a single-phase system. The other options describe voltages and types of service more typical of commercial or industrial installations (three-phase or a 120/208 arrangement), which is why they’re not used for standard residential service.

Residential service in most areas uses a split-phase single-phase system. A center-tapped transformer provides two hot conductors that are 180 degrees apart. Any one hot to neutral gives about 120 volts, while the voltage between the two hot conductors is about 240 volts. This setup powers everyday outlets at 120 V and larger appliances at 240 V, all within a single-phase system. The other options describe voltages and types of service more typical of commercial or industrial installations (three-phase or a 120/208 arrangement), which is why they’re not used for standard residential service.

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