That's what i was going to say. If it's a cheap meter, don't worry about
it. Bond everything and you should be fine.
On 3/31/2016 5:27 PM, Chuck McCown wrote:
Depends on the meter. Does the meter read 0.0 when the leads are
shorted together?
Some meters have some random fluctuations in the least significant
digit all the time.
*From:* Josh Baird <mailto:[email protected]>
*Sent:* Thursday, March 31, 2016 3:24 PM
*To:* [email protected] <mailto:[email protected]>
*Subject:* [AFMUG] Another ground question
I'm working on a new DC enclosure (steel 19" rackmount cabinet). When
using a DC volt meter, and putting the 'red' lead on a common ground
point (my ground bus, a metal rack rail, etc), and the 'black' lead on
something metal, I'm seeing ~0.1V.
I'm assuming this is bad. On the bench currently, I have the AC
ground connected to my PSU. I have all other devices (switch, surge
suppressors, rack rails, etc) tied to a common ground that isn't yet
connected to earth. My PSU and power distribution is on a metal DIN
rail which in turn is mounted to the metal rack rails.
Should I be concerned with this? As much as I try (or not), I still
have trouble wrapping my head around ground/ground potential/etc.
Josh
