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<blockquote data-quote="Mike Sokol" data-source="post: 93262" data-attributes="member: 1989">Re: Bad mic shock&#039;&nbsp;The beauty of using a NCVT (Non Contact Voltage Tester) like a Fluke VoltAlert to test for hot-grounds on stage is that you don&#039;t need to measure &quot;between&quot; two pieces of gear to find out what&#039;s &quot;hot&quot;. Since a NCVT is capacitively coupling to the earth below, it doesn&#039;t require an actual connection to earth ground like a standard voltmeter. So it&#039;s really obvious when you point it at a guitar amp with a &quot;hot&quot; chassis and it starts beeping. In fact, if the guitar amp chassis is sitting at 120 volts (easily possible) than a standard 90 to 1,000 volt VoltAlert will trigger from nearly a foot away from the amp. This allows you to point out to the talent that their guitar amp chassis (and any guitar plugged into it) is dangerously electrified. And if you indeed have a floated ground on your entire PA system (very possible plugged into ungrounded genny power or mis-wired building power) then a VoltAlert will trigger anywhere close to any of the mics on stage. It&#039;s a really quick and obvious safety check that takes only seconds to perform. Yup... I&#039;ll do a video of this when I get back from a gig this weekend. Mike Sokol</blockquote>

[QUOTE="Mike Sokol, post: 93262, member: 1989"] Re: Bad mic shock ' The beauty of using a NCVT (Non Contact Voltage Tester) like a Fluke VoltAlert to test for hot-grounds on stage is that you don't need to measure "between" two pieces of gear to find out what's "hot". Since a NCVT is capacitively coupling to the earth below, it doesn't require an actual connection to earth ground like a standard voltmeter. So it's really obvious when you point it at a guitar amp with a "hot" chassis and it starts beeping. In fact, if the guitar amp chassis is sitting at 120 volts (easily possible) than a standard 90 to 1,000 volt VoltAlert will trigger from nearly a foot away from the amp. This allows you to point out to the talent that their guitar amp chassis (and any guitar plugged into it) is dangerously electrified. And if you indeed have a floated ground on your entire PA system (very possible plugged into ungrounded genny power or mis-wired building power) then a VoltAlert will trigger anywhere close to any of the mics on stage. It's a really quick and obvious safety check that takes only seconds to perform. Yup... I'll do a video of this when I get back from a gig this weekend. Mike Sokol [/QUOTE]

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