Quote:
Originally Posted by 2 Oldcrabs
The ground rod I am talking about is for the electrical panel box. If you are having Lightning Protection installed on your roof, they will install several ground rods where the ground wire comes down from the roof. Just make sure they "meggar" the rods for 25ohms or less.
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A "megger" test is a term used for megohm meter test. It is used to measure the effectiveness of insulation when exposed to a high voltage, typically 500 volts. the 25 ohms or less resistance check would be done with a regular continuity tester or if looking for really low resistance a micro ohm meter.