The presence of three entrance cables providing service to a house indicates what voltage?

The presence of three entrance cables providing service to a house typically indicates a 240-volt service. This configuration is common in residential settings where two hot wires (or phases) are used along with a neutral wire to provide dual voltage options. In a standard residential electrical system, the two hot wires deliver 120 volts each, but when combined, they deliver 240 volts across the two, making it suitable for larger appliances that require higher voltage.

This setup is often utilized for powering major appliances such as dryers, water heaters, and ovens, which require more energy than standard household circuits. The presence of three cables could suggest a split-phase electrical service, which is prevalent in North America. It’s important to distinguish that while 240 volts can be derived from three cables, the reference to 100 amps does not indicate voltage, but rather the current capacity for the service. Thus, option B aligns with the standard electrical provision through multiple entrance cables and is directly associated with the dual voltage supply to the property.