How dangerous is a two prong amp?

[Robert Delahunt]

Re: How dangerous is a two prong amp?

I said disconnect the strings from the guitar ground (and shield instead to control interference). Not to disconnect the amp from ground, man. What the heck?

I misunderstood.

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[uOpt]

Re: How dangerous is a two prong amp?

Sorry. Thanks.

I should really stop posting in threads like these. There are multiple reasons for on-stage shocks and nobody ever makes an effort to debug what came from what. Anything specific said might might not apply to a given person in a given situation but that person is unlikely to memorize the whole catalog of reason. Meh.

But there is nobody to go to because at least in the US actual licensed electricians have for the most part no clue either. They have their instructions for new wiring but they have no idea of how it works behind the scenes and they cannot debug an ongoing malfunction other than redoing from scratch. It is really annoying.

 

[Robert Delahunt]

Re: How dangerous is a two prong amp?

Sorry. Thanks.

I should really stop posting in threads like these. There are multiple reasons for on-stage shocks and nobody ever makes an effort to debug what came from what. Anything specific said might might not apply to a given person in a given situation but that person is unlikely to memorize the whole catalog of reason. Meh.

But there is nobody to go to because at least in the US actual licensed electricians have for the most part no clue either. They have their instructions for new wiring but they have no idea of how it works behind the scenes and they cannot debug an ongoing malfunction other than redoing from scratch. It is really annoying.

Ok fair enough.

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[That90'sGuy]

Re: How dangerous is a two prong amp?

But there is nobody to go to because at least in the US actual licensed electricians have for the most part no clue either. They have their instructions for new wiring but they have no idea of how it works behind the scenes and they cannot debug an ongoing malfunction other than redoing from scratch. It is really annoying.

Sadly, my first hand experience attests that this is true. As someone who went to technical school for high voltage electrical, I can tell you I was never really taught "how" or "why" some of this stuff is done. I was always taught that the ground is a separate path for extraneous noise and induction to bleed through, but it never made sense to me why the ground and neutrals were tied at the same bus bar. It would seem to make more sense to me if they were truly isolated from one another all the way through.

 

[uOpt]

Re: How dangerous is a two prong amp?

Sadly, my first hand experience attests that this is true. As someone who went to technical school for high voltage electrical, I can tell you I was never really taught "how" or "why" some of this stuff is done. I was always taught that the ground is a separate path for extraneous noise and induction to bleed through, but it never made sense to me why the ground and neutrals were tied at the same bus bar. It would seem to make more sense to me if they were truly isolated from one another all the way through.

It goes back to what Lew said above. There is no fundamental difference, a 2 prong is still grounded. It is just a small set of additional error conditions that is now covered by a blown fuse. (ETA: and a smaller number that is now more dangerous, it is all tradeoffs)

The total number of error conditions that gets people zapped is annoying high and as I said, nobody ever debugs anything.