According to regulations, when using a voltmeter, what would indicate a functioning receptacle?

A reading of 120 volts on a voltmeter indicates a functioning receptacle because this is the standard voltage for most electrical outlets in residential and commercial settings in North America. When properly wired and operational, a receptacle should provide this voltage, allowing electrical devices to function correctly.

In contrast, a reading of 0 volts suggests that there is no electrical supply to the receptacle, which indicates a problem like a blown fuse, tripped circuit breaker, or faulty wiring. Similarly, a reading of 60 volts is not typical for standard receptacles and could indicate an issue like a partial connection or low supply voltage, which would not be suitable for devices designed to work at 120 volts. Constant fluctuations in the reading can point to an unstable electrical connection or interference, which also does not signify a properly functioning receptacle. Therefore, the presence of a stable reading of 120 volts confirms that the receptacle is functioning as intended.