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| Got shocked by 120VAC |
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| Zero999:
--- Quote from: james_s on June 17, 2021, 06:37:04 am --- --- Quote from: Zero999 on June 14, 2021, 12:35:55 pm ---Another benifit of an RCD for the whole house is, it provides protection for cables inside the walls, in case somone hammers a nail through a cable, in the wall, when they're hanging a picture. --- End quote --- We're not allowed to run wires such at this can reasonably happen to them. Code requires a metal nail plate be installed over every stud where a wire passes through it. https://www.homedepot.com/p/MiTek-1-1-2-in-x-3-in-G90-16-Gauge-Protection-Plate-60-Pack-UKNS1BK/313491991 --- End quote --- The same is true here, but there's always the outside chance someone will do something stupid, hence the requirement for an RCD.https://the-regs.co.uk/blog/?p=586 |
| Siwastaja:
Obviously an RCD has no purpose if everything is done properly by the rules and maintained as such. It's exactly there to save lives in cases of human error, including wiring in the wrong place. |
| ejeffrey:
--- Quote from: YetAnotherTechie on June 05, 2021, 09:44:02 pm ---For the unbelievers, here's a 9V battery death: https://darwinawards.com/darwin/darwin1999-50.html :popcorn: --- End quote --- I am an unbeliever, I think that story is almost certainly a myth or widely distorted. There is an easy and completely safe demo of this. Go take a multimeter and a jar of saline solution at human body temperature and measure the resistance just dunking the probe tips in. You will find it is quite high. The reason for that is the probe tips are have low surface area and the spreading resistance around them is still quite high. Now if you attach some alligator clips and some copper braid and try again there will be a much lower resistance. At low voltages it is a much bigger problem if you grab onto a large metal pipe vs pierce the skin with a small probe. |
| PlainName:
Head to foot resistance of the body appears to be ~400R which would give 22mA from a 9V battery. Since it's not head to foot, a larger current and severed complications seems possible. Possibly mitigated by being DC, though. https://www.researchgate.net/publication/335250921_Electric_Shock_Drowning_Causes_and_Prevention |
| ejeffrey:
--- Quote from: dunkemhigh on June 17, 2021, 08:00:42 pm ---Head to foot resistance of the body appears to be ~400R which would give 22mA from a 9V battery. Since it's not head to foot, a larger current and severed complications seems possible. Possibly mitigated by being DC, though. https://www.researchgate.net/publication/335250921_Electric_Shock_Drowning_Causes_and_Prevention --- End quote --- Go do the experiment I suggested. Getting hundreds of ohms through salt water requires a very large electrode area. |
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