Browsing articles tagged with "grounding - Licensed Electrician Robert Monk"

Who needs ground wires? Modern cables don’t mean proper wiring

Feb 2, 2012   //   by Robert Monk   //   Field Reports Blog, Reasons to do electrical right  //  1 Comment

I recently extended an existing circuit that looked great on initial inspection, but turned out to consist of multiple basement junctions where the equipment grounding conductor in the modern type NM cable had been cut short and left hanging un-terminated.

In a lightning storm, the magnetic fields induced by nearby high-voltage lightning strikes will induce current in anything metal in the home, including wires. When grounding conductors are bonded properly to provide a low-impedance path to ground at the service equipment, they can help to quickly drain away transient voltage surge before it can find an unintentional path to ground that may cause damage. Similarly, the same low-impedance ground fault path ensures that short-circuit current through circuit breakers will be maximized, helping them to trip quickly and protect equipment, buildings, and people. 

More lazy ground wire twist photos and notes >>

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