Reply to thread

Message

<blockquote data-quote="John Roberts" data-source="post: 84603" data-attributes="member: 126">Re: Bad mic shock+1, could be nothing wrong with guitar amps, but a mis-wired outlet/distribution can energize the chassis ground, putting mains voltage on the guitar ground. PEOPLE DIE FROM THIS. There have been pretty good threads around several forums recently about importance of proper testing of outlets (more than just the 3 led thingys). VOM will work fine if you know what to measure for. ======I recall a long and detailed discussion a few years ago (on another forum) about the effectiveness of capacitor coupling the ground inside the guitar to protect the player from shock, should he plug into an energized guitar amp ground.&nbsp; After much back and forth, we determined that there was a useful range of capacitor values that would provide enough ground coupling to prevent hum pickup in an ungrounded guitar, while be small enough to keep AC current flow from mains voltage low enough to not stop the musician&#039;s heart. While I suspect it would hum like a banshee in that case, and might sting a little. ======If this facility has a rouge outlet or outlets they need to get their act together. In the court case about the death I knew of, the house with the bad outlets was condemned until the wiring was corrected. Not to mention liability if there is serious injury, or death. JR</blockquote>

[QUOTE="John Roberts, post: 84603, member: 126"] Re: Bad mic shock +1, could be nothing wrong with guitar amps, but a mis-wired outlet/distribution can energize the chassis ground, putting mains voltage on the guitar ground. PEOPLE DIE FROM THIS. There have been pretty good threads around several forums recently about importance of proper testing of outlets (more than just the 3 led thingys). VOM will work fine if you know what to measure for. ====== I recall a long and detailed discussion a few years ago (on another forum) about the effectiveness of capacitor coupling the ground inside the guitar to protect the player from shock, should he plug into an energized guitar amp ground. After much back and forth, we determined that there was a useful range of capacitor values that would provide enough ground coupling to prevent hum pickup in an ungrounded guitar, while be small enough to keep AC current flow from mains voltage low enough to not stop the musician's heart. While I suspect it would hum like a banshee in that case, and might sting a little. ====== If this facility has a rouge outlet or outlets they need to get their act together. In the court case about the death I knew of, the house with the bad outlets was condemned until the wiring was corrected. Not to mention liability if there is serious injury, or death. JR [/QUOTE]

Verification