All questions and answers are based on the 2017 NEC. Underlined text indicates a Code change. Q. What is the reason stated in the NEC for connecting electrical systems to the earth (grounding)? A.
A. Electrical power systems are grounded (connected to the earth) to limit the voltage induced by lightning, line surges, or unintentional contact by higher‑voltage lines and stabilize the system ...
The IET has announced that the latest amendment to the UK’s national standard for low-voltage electrical installations, BS 7671, will be available from 15 April 2026.
IT is well known that direct current causes electrolytic corrosion when it leaves a metal conductor or pipe to enter the earth, but there is still a difference of opinion as to whether alternating ...
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