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North American domestic analog (Ferraris disk) electricity meter. Electricity meter with transparent plastic case (Israel) An electricity meter, electric meter, electrical meter, energy meter, or kilowatt-hour meter is a device that measures the amount of electric energy consumed by a residence, a business, or an electrically powered device over a time interval.
High-precision laboratory measurements of electrical quantities are used in experiments to determine fundamental physical properties such as the charge of the electron or the speed of light, and in the definition of the units for electrical measurements, with precision in some cases on the order of a few parts per million. Less precise ...
The EAC is initially provided by the supplier, and thereafter forecast based on actual meter readings. Data from the Data Collector (EAC/ AA's) is provided to the non-half-hourly data aggregator, which aggregates the individual values provided into a single figure split in a number of ways e.g. geographically or by supplier.
The electrical resistance of a uniform conductor is given in terms of resistivity by: [40] = where ℓ is the length of the conductor in SI units of meters, a is the cross-sectional area (for a round wire a = πr 2 if r is radius) in units of meters squared, and ρ is the resistivity in units of ohm·meters.
A utility meter is any of the following metering devices used on utility mains: Electricity meter , a device for measuring electricity usage Smart meter , an electrical meter that records consumption of electric energy and communicates information to the utility for monitoring and billing
A Meter Point Administration Number, also known as MPAN, Supply Number or S-Number, is a 21-digit reference used in Great Britain to uniquely identify electricity supply points such as individual domestic residences. The system was introduced in 1998 to aid creation of a competitive environment for the electricity companies, and allows ...
A submetering system typically includes a "master meter", which is owned by the utility supplying the water, electricity, or gas, with overall usage billed directly to the property owner. The property owner or manager then places their own private meters on individual tenant spaces to determine individual usage levels and bill each tenant for ...
Contact resistance meter Measures the contact resistance of a power switching devices. Circuit breaker analyzer: Measures the parameters of a circuit breaker. Grounding resistance tester: Measures the parameters of a soil for grounding application. Transformer oil tester: Measures the parameters of an oil in a power transformer.