THE WORK
● Earth ground resistance measurement defines the electrical resistance between a grounding electrode and the surrounding soil.
● The displayed value of 950 milliohms (mΩ) represents the continuity of the conductive path to the earth.
● A resistance below one ohm (Ω) is generally considered efficient for protective grounding systems. ⚡
● Ground resistance values determine the safety and reliability of electrical installations.
● The clamp technique allows measurement without disconnection of the grounding conductor.
● Proper grounding guarantees dissipation of fault currents into the earth.
THE AUTHOR
● The manufacturer reference visible in the instrument denotes a professional brand specialized in electrical measurement devices.
● The model label identifies a clamp-on ground tester designed for field verification.
● The digital interface indicates resistance in milliohms with large clear characters. 📟
● The inclusion of a “HOLD” and “LOCK” function ensures data retention during measurements.
● The presence of alarm settings allows operators to detect when resistance exceeds defined thresholds.
● The ergonomic design with a red clamp accommodates different conductor geometries.
TECHNICAL CONTEXT
● The measured resistance of 950 mΩ lies within acceptable ranges for industrial grounding systems.
● Clamp-on ground testers evaluate grounding without auxiliary electrodes or system interruption.
● The measurement ensures compliance with safety codes that require efficient earth dissipation. 🛠️
● The resistance value depends on soil resistivity, electrode depth, and conductor integrity.
● Low resistance indicates robust physical connection and effective earth coupling.
● High resistance would imply poor contact, corrosion, or insufficient electrode depth.
LEARNING OBJECTIVE
● The central knowledge to acquire is the technical understanding of earth ground resistance measurement as displayed by a clamp-on ground tester.
My Diary - Leonardo Cardillo 