WattPhase

WattPhase helps you review common energy metering devices and how they are wired. Browse single-phase meters, three-phase three-wire meters, three-phase four-wire meters, instrument transformers, and smart meters. Each entry covers the main function, wiring points, and frequent connection mistakes such as reversed phase order or reversed CT polarity. Compare direct access for smaller loads with transformer access for larger current or higher voltage services. Use the ratio calculator to multiply a meter reading by CT and PT ratios with clear decimal handling. Open the smart meter section for remote reading, time-of-use registers, load monitoring, and anti-tamper notes. Content is a simplified reference based on basic metering and wiring practice.