Explanation: Section 250.53(A)(2) requires that a single ground rod be supplemented by another electrode. An exception allows a single rod if the resistance of this ...

Lightning protection is a critical aspect of establishments that operate sensitive electrical equipment, especially in the broadcast industry. Tied to this first line of protection against lightning ...

AEMC is introducing new portable ground resistance testers that are ideal for testing commercial, residential and light industrial grounding systems. The design simplifies the process and provides ...

AEMC’s rugged, digital ground resistance tester Model 6470 performs grounding resistance, earth coupling measurement, soil resistivity and bonding tests. This direct reading tester measures from 0.01 ...

The author is southwest tech engineer for Wheatstone Corp. Hardly a week goes by that the Wheatstone Tech Support department doesn’t get at least one call from a customer who is having equipment ...

Explanation: Section 250.53 of the NEC requires that any made electrode that has a resistance greater that 25 ohms be supplemented by another electrode. The NEC does not require that an electrode have ...