On Wednesday, 14 March 2018 20:04:04 UTC, wrote:
On Wednesday, March 14, 2018 at 1:44:28 AM UTC-4, tabby wrote:

GFCIs are far from failsafe. Well worth having but not entirely reliable by any means, and not failsafe.


Nothing is fail-safe other than a low-voltage, battery-operated system. Anything that includes a primary source whether isolated or not, whether on a GFCI device, or not - there could be a way for primary power to migrate to the secondary side and/or jump the GFCI device. One may reduce the odds of failure via redundancy, or by other means. Or, one may take ordinary common-sense precautions in the full understanding that nothing is perfect.

Kinda-sorta like spending one's life living under a rock, or taking the ordinary risks of daily life and enjoy what life one is allotted under such terrible threats.

Peter Wieck
Melrose Park, PA

That doesn't really tell us anything does it. Let me put it another way: RCD failures are no rarity. They're nowhere near failsafe. And of course they don't act on all shock/electrocution scenarios anyway.


NT