I have a metal chassis that’s anodizied. I connected bottom plate within the chassis to the main earth point, and it works fine. But testing the various side panels with a meter and what not, they don’t seem to be connected. I’m guessing the anodizing on the panels interferes with the connection in some spots.
Is there any harm from using the earth lug as a star point for earth and running and few wires to the other chassis panels to ensure they are properly earthed as well? From a safety perspective I’d be more comfortable if any panel a user might touch would be properly earthed.
Is there any harm from using the earth lug as a star point for earth and running and few wires to the other chassis panels to ensure they are properly earthed as well? From a safety perspective I’d be more comfortable if any panel a user might touch would be properly earthed.
Might be easier to remove offending panels, & using fine sandpaper (400grit wet/dry) sand the anodising off on any internal overlaps between the panels..this to achieve full connection through all the panels.
Or if there are any washers on the fixings used to join the panels use a spiked/grip washer under it as these dig into the surface & through the anodising.
Pictures would help..😉
Or if there are any washers on the fixings used to join the panels use a spiked/grip washer under it as these dig into the surface & through the anodising.
Pictures would help..😉
Not as long as it meets the code requirements for the intended app, i.e. wire size/type, connections. Me too!
That's a routine connection in industry, and ensures safety, unless all of the pieces are welded together.
All of the wires could carry fault current.
I was under the impression that the earth ground lug was supposed to have JUST the mains earth connected to it. Maybe I'm misreading what the OP is proposing.
Sure, but why? I get not making loops, but considering the entire chassis is effectively one big loop / faraday cage, I don't seem why running a wire along a chassis wall is any different than the metal of the chassis running along that same path.
If you put star washers between panels things won’t line up properly. Just scrape/sand. 🙂
the earth ground lug should first have the Safety Ground/Protective Earth bonded to it (permanently attached) then other wires may be attached. Like the power transformer frame.
But the audio circuit common and the DC supply common should be attached to the chassis near the input connectors.
And of course, cable shields should be attached to the chassis near their jacks.
The Safety Ground from the wall should have a Dedicated Screw so-that future fixers won't leave it off after repairing other grounding.
Probably nobody will know or care about DIY, but it isn't a huge added cost and "should not" corrupt your audio grounding theories.