This has become, to an extent, an offshoot of other grounding threads here on the forum.
What always should be remembered, is that ground is not 0 volts; the anode of a battery (cell) is not +V. Voltage can only exist between two points.
This is what the "isolated" in AndrewT's post refers to - the voltage is referenced to an isolated point for safety. Specifically, the electrical potential is between the two ends of the secondary, not between the secondary and a human body (even a body that is at earth ground). No EMF, no current flow.
But please don't go grabbing live secondaries unless you're very sure that you absolutely must!
What always should be remembered, is that ground is not 0 volts; the anode of a battery (cell) is not +V. Voltage can only exist between two points.
This is what the "isolated" in AndrewT's post refers to - the voltage is referenced to an isolated point for safety. Specifically, the electrical potential is between the two ends of the secondary, not between the secondary and a human body (even a body that is at earth ground). No EMF, no current flow.
But please don't go grabbing live secondaries unless you're very sure that you absolutely must!
We do it all the time.
Every time we touch an adjustment knob, or an interconnect, or a Chassis, we are grabbing hold of an isolated live secondary. Some of us know that. The rest do it unknowingly.
"Grabbing live secondaries" doesn't equate with "touch an adjustment knob" in the former's context (which was safety-related (obviously??)).
So the writers have been roasted. Is it past time for the readers to feel some heat?
For me it is less excusable than someone's less-than-stellar grammar, spelling and punctuation.
So the writers have been roasted. Is it past time for the readers to feel some heat?
For me it is less excusable than someone's less-than-stellar grammar, spelling and punctuation.
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