14 Years Factory XJM7-W Measuring Box (Outdoor Energy Measuring Box) to United States Importers
Exterior and dimensions
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XJM7-K measuring cabinet (outdoor street lamp measurement control box) is suitable in power supply line with AC 50HZ, rated insulation voltage 660V, rated voltage 380/220v, as energy measurement equipment of residential quarters, villas energy measurement etc.
In line with GB7251.1-1997 and GB7251.3-1997 standards.
For many installations the resistance of the earth electrode can be measured using an earth fault loop impedance test instrument.
This test is explained in the video. Further information is contained in Chris Kitcher’s ‘Practical Guide to Inspection, Testing and Certification of Electrical Installations’, p74-90, see link above.
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