Reminder: Never connect a generator to home wiring without transfer switch

Mel Beckman mel at
Mon Aug 30 16:09:19 UTC 2021


If you read back in this thread (using the NANOG mailing list archive), you’ll find this has been explained in great detail. In a nutshell, phase grounding won’t help if a generator is energized from the customer end, and this technique was discontinued in the 1970s due to the many deaths that resulted.


On Aug 30, 2021, at 9:02 AM, Aaron C. de Bruyn via NANOG <nanog at> wrote:

On Mon, Aug 30, 2021 at 7:35 AM Lady Benjamin Cannon of Glencoe, ASCE <lb at<mailto:lb at>> wrote:
Yes, this is a real and dangerous problem.  Today.  Even with grounding I’m afraid.  Source: I’ve been working in an engineering capacity for 27 years and I have the license you’d need to build a nuclear power plant.

Would you care to educate me on this?
If you ground the phases on both sides of the work-site, how are you going to end up being a better path to ground?

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