House Watt Hour Meter

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InspectAPedia tolerates no conflicts of interest. We have no relationship with advertisers, products, or services discussed at this website. Electric meter inspection & repair: . This article discusses the visual inspection of electrical meters & meter bases & explains how to estimate the electrical service size, (or "electrical power" or "service amps") at a building by visual examination of the service entry cables, electric meter and meter base, electrical service panel, main switch, & other details. We describe types of electric meters, meter inspection points, and how to read an electric meter. We also discuss electrical arc burns at the meter base and we include case reports of electric meter base overheat and arcing damage, failures, and repairs. We also provide an ARTICLE INDEX for this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. Visual inspection of the electric meter and use of digital multimeters(DMMs), Volt-ohm meters (VOMs), neon testers, and electrical inspection safety are discussed here along with tips on how to read an electric meter and how to read a smart meter or digital electric meter. Photo: a free-standing electric meter and base panel outdoors in Port Angeles WA, USA. [Click to enlarge any image]. We discuss common electric meter defects, inspection points, and also meter readings, as we include photographs and sketches illustrate electrical panels, meter bases, and electric meters of various types in several countries. One of the most frequently asked questions at home inspection conferences and education seminars is "How do I determine the service amperage?" This question is no surprise, as even a casual inspection of the components of a building electrical service can turn up inconsistencies among service entry cable size, electrical meter rating, electrical panel rating and the main power disconnect ampacity. Watch out: building inspectors learn quickly enough that just reading off the amperage number on the main power disconnect or5 "main breaker" is not an assurance that we have correctly named the building electrical service ampacity. And discussion among various experts and one of the original reviewers (Douglas Hansen) quite aptly raised questions about the accuracy of estimating service size in volts or amps by inspecting modern electrical meters. While some of the cases illustrated here remain accurate, these methods may be unreliable when examining modern electrical meters and meter bases. ELECTRIC METERS & METER BASES - start of this article. ELECTRIC METER BASE vs SERVICE AMPS - continues below. It's not as difficult as one may think to get a reasonable handle on the electrical service capacity at a building without sophisticated analysis. But there are some pitfalls, and the process itself is dangerous. The photos and text below will assist in identifying a variety of electrical meters and service panels of various ages and capacities. Below: a bank of electric meters in Oxaca and in the second photo a pair of 120VAC electric meters in La Huerta, Mexico illustrate a broad range of meter size and installation. An article in the Winter, in 1992 an ASHI Technical Journal produce & edited b DF discussed the procedure and considerations for inspectors to determine the service ampacity of an electrical system.