Re: Frame ground vs. "neutral" for DC


"John Larkin" <jjlarkin@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:c9o882pnas2jsv0klkppdb9sbhef9jdvqp@xxxxxxxxxx
On Mon, 05 Jun 2006 16:32:17 GMT, Ignoramus11409
<ignoramus11409@xxxxxxxxxxxxxxxxxxxx> wrote:

I have a welder with a bunch of DC electronic parts (5v, +/-12V), as
well as with some 120VAC components.

Obviously, good practice calls for separating ground from neutral for
120VAC equipment.

My question is, should I isolate GND for 12V, 5V etc equipment, or can
I just use equipment frame as ground?

thanks

i

For emi protection (which you sure as heck need) bolt everything to
frame ground as often as possible, and hard ground cable shields at
both ends. Multilayer boards with a solid internal ground plane help
greatly, and don't even think about separating analog and digital
grounds.

There seem to be 2 schools of thought on that last item.



.

Relevant Pages

  • Re: Frame ground vs. "neutral" for DC
    ... good practice calls for separating ground from neutral for ... My question is, should I isolate GND for 12V, 5V etc equipment, or can ... I just use equipment frame as ground? ...
    (sci.electronics.design)
  • Re: Frame ground vs. "neutral" for DC
    ... good practice calls for separating ground from neutral for ... My question is, should I isolate GND for 12V, 5V etc equipment, or can ... from all the planes clear back to a "star ground" at the power supply. ...
    (sci.electronics.design)
  • Frame ground vs. "neutral" for DC
    ... I have a welder with a bunch of DC electronic parts, as ... good practice calls for separating ground from neutral for ... My question is, should I isolate GND for 12V, 5V etc equipment, or can ...
    (sci.electronics.design)