really? .89c ground lifters?


if i understand correctly (and I'm guessing that I don't), only one component in a given system should be grounded.

so does that mean that all you guys with your GNP-level systems, plumbed with bazillion dollar power cords, are using a bucketful of home depot-style ground lifters? I'm having a hard time wrapping my head around that. Is there some source for solid-gold cryo'd ground lifters I have not found?

How is this problem addressed? My searching skills are failing this morning...there was a lot of chilean and argentinean wine involved last night. thanks.
soundgasm

Showing 4 responses by auxetophone

It's probably worth pointing out that the danger from lifting grounds is much higher with tube components. These typically have 300+ VDC - very deadly.

Also, this comment

"Having all of your high power equipment on one phase will overload the wiring, cause it to heat up (IxIxR) losses and cause the insulation to fail causing a major electrical fire"

seems a little out of touch in an audio context. It's unlikely that any audio circuit - no matter how powerful or loudly played - will draw as much current as a wall air conditioner. I don't know anyone who checks to make sure the air conditioner and refrigerator are on opposite phases. These two are a much bigger load than having your power amp and cd player on the same outlet.
"The only way to get a shock from the B+ is to actually put yourself in series between the B+ and B- ..... Lifting the safety ground would not change the likelihood one way or the other....."

Actually, if something goes wrong with the equipment - like a B+ wire touching the chassis - you're better off sending that to ground and blowing a fuse, than letting it sit out there to electrocute your kids.
Jea48 - how can I tell whether my equipment is a three wire cord and plug deal or the kind that's safe?