Not sure whether this is the correct place for this thread, but I need to know what's happened.
Went to band practice today to the usual place, and I play guitar and sing in the band. Plugged my mic lead into the PA, no probs. About 15 minutes before the end of the (4 hour) session and I got an electric shock from the mic to my lips - not a big shock, but it made me jump. Then every time that I went to touch the mic subsequently I got shocked again.
Is it a problem with the PA / the Mic / the cable?
Any ideas what's at fault? The shock seemed to be worse when I was touching the guitar strings.
Help!
Comments
Did it feel sharp, or dull?
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It's unlikely to be actively dangerous - you'd know about it more than a mildly unpleasant tingle if the mic was actually live - but it does mean that it could potentially become so if something else goes wrong.
The reason it's worse if you're touching your guitar strings is because your amp and guitar are earthed, and hence provide the best leakage path to earth, via you. This is what becomes extremely dangerous if the PA does become fully live.
Unfortunately an RCD may not help because it won't remove the earth connections. It depends where the leak is coming from as to whether it does anything or not.
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