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General Asylum General audio topics that don't fit into specific categories. |
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In Reply to: Re: ? about a Cheater plug to eliminate hum---might this configuration cause "death"? posted by pande on April 6, 2007 at 22:28:46:
Consider plug-in lights, ie., table lamps, and floor lamps. In the U.S., these are all two wire devices, typically with exposed metal work. If the zipcord in these lights somehow becomes frayed, and the hot conductor touches the metalwork of the lamp, the lamp will become hot. If someone touches the lamp, and a good ground, he could be electrocuted.
Maybe true with older lamps not sure that would be the case with lamps sold in the last several years.
When a transformer is wound, one terminus of the winding is at the iron core. The other is on the outside. When the inner winding termination is connected to neutral, this provides protection against a transformer short. Even if the inside of winding shorts to the frame, which is extremely unlikely, it will not elevate the potential of the amplifier chassis above neutral, which is actually at ground potential.
Good in theory but in reality, at least High-End gear, manufactures will connect the primary leads of the transformer either way for their polarity check of the power supply of the equipment.
This is not true in a 220 volt country. In this case, neither lead is at ground potential.
You may want to check. My understanding one leg is intentionally grounded becoming the the grounded conductor, neutral.
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- Re: ? about a Cheater plug to eliminate hum---might this configuration cause "death"? - jea48 07:42:37 04/07/07 (0)
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