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In Reply to: There has been much said here about the safety of grounding, but little about bonding. posted by Norm on April 16, 2007 at 14:25:45:
Much confusion arises from the wide-spread misuse of the word, "ground," for the safety conductor system. That this system has to be bonded throughout is a simple reflection of the need for low connection resistance. "Bonding" means the equipment, conductors, and neutral supply wire all must be connected such that they can conduct a fault current without allowing a dangerous voltage to appear on the faulty equipment in the time it takes the circuit breaker to operate.This contradicts the rationalization for using 'cheater' plugs that says the ungrounded (unbonded) equipment can be grounded (bonded) through the interconnect cable audio ground conductor to a grounded (bonded) piece of equipment. Very few interconnect cables have adequate ground conductors to perform this function, and the detachable connectors would not be considered a form of 'bonding.'
Follow Ups:
a
There is all manner of noise present in the potential difference between the earth connection rod at your breaker panel and the arbitrary zero point somewhere inside your line stage or source (audio 'ground'). Keeping this noise out of your audio system makes a big difference in how well it works.
a
It is always relative to something else.It is convenient to call the mass of the Earth "ground" and use it as the "zero reference point" but it has no meaning other than that.
Maybe the moon is at 10,000,000 volts relative to the earth. No consequence unless you plan to wire them together!
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