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

Mel Beckman mel at
Mon Aug 30 17:58:49 UTC 2021


Your incorrect assumption is that lineman are tying phases to earth ground, a discontinued practice that killed many lineman up through 1980, despite its seeming faultless logic.

The current safety practice is called “equipotential grounding”, which doesn’t go to earth. Thus an backed can change the balance of potentials, resulting in lethal currents. As other have pointed out with real-word examples, this is a major safety issue, cause by the many “dumb enough” DIYers out there.

All explained elsewhere in the thread. I recommend you review the previous discussion, to avoid creating a NANOG bridge loop :)


On Aug 30, 2021, at 9:43 AM, Aaron C. de Bruyn <aaron at<mailto:aaron at>> wrote:

I've been following the thread.
If I'm dumb enough to back feed through the transformer into the downstream side of the downed line, how is it going to be a problem if linemen are grounding the phases on *both sides* of the work area.
That's what Ben seemed to be implying.

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