What's the difference between revenue grade and revenue certified? What's the Setra Power Meter?

The Setra Power Meter complies with accuracy class ANSI c12.20 0.2 (which is widely accepted as revenue grade). 

However, our meter is not 3rd party certified. Revenue certified would have 3rd party certification; for example, UL, National Testing Services (NTS), Intertek, and others.

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