Acupuncture facility

[cowboyjwc]

how about illegitimate massage?

They have their own set of problems.

 

[Volta]

how would you figure that?

The bad path? From an electrical outlet or switch through therapist to needle through skin through body to hand to conductive table element to table leg to masonry tile floor to steel bottom-plate to stud to flush-mounted panel to EGC bar.

Or the reduced effect path? From the electrical device to the lower-resistance EGC path to the EGC bar.

 

[petersonra]

The bad path? From an electrical outlet or switch through therapist to needle through skin through body to hand to conductive table element to table leg to masonry tile floor to steel bottom-plate to stud to flush-mounted panel to EGC bar.

Or the reduced effect path? From the electrical device to the lower-resistance EGC path to the EGC bar.

Unless I missed something none of this would be an issue unless there was some kind of ground fault that was not cleared. None of the redundant ground stuff changes that any.

 

[Volta]

Unless I missed something none of this would be an issue unless there was some kind of ground fault that was not cleared. None of the redundant ground stuff changes that any.

Well AFAICT, that's the whole thing about HCFs. A few mA can cause damage in certain situations, and equipment is not necessarily required to be installed to open the circuit at those levels, in most areas of the building. So as the first EGC path becomes too high of a resistance due to a loose connector or similar, the second parallel one should pick up the slack as a current divider and reduce the flow over/through the flesh of the patient.