Re: grounding questions


"Rheilly Phoull" <Rheilly@xxxxxxxxxxx> wrote in message
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none none wrote:
"Rheilly Phoull" <Rheilly@xxxxxxxxxxx> wrote in message
news:4494af18$0$12274$5a62ac22@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
none none wrote:
Can the below be done safely? I have two circuits running 2
different sources.. space is limited and if I can get away with
using a single ground that would be fantastic.

+120VAC-----------------|+ AC
-----------------| LOAD
|
GND------|
|
-----------------|-DC
+12VDC-------------------|+ LOAD

Not unless ya got a death wish !!
Your diagram is not clear though, surely you are not using active to
ground for the AC part ??

--

Cheers ......... Rheilly P

Where theres a will, I want to be in it.

Here is clarification for you on what i'm actually doing.
I have a cold cathode light that runs off 120VAC, i have a inverter
that converts 12VDC to the neccessary 120VAC.. i have an series of
LED's that need DC.. so i was thinking of running the positive line
for the DC power to the LED's then just hook the ground of the LED
segment to the same ground as the return to the inverter.

Ok I get it. I would not be comfortable with relying on the integrity of
the ground since if there is any failure in that connection ya gonna end
up with a handful of volts on the leds, perhaps you could use some of the
modern thin insulation cable available and keep the circuits isolated ?

--

Cheers ......... Rheilly P

Where theres a will, I want to be in it.

What if i put a zener diode on the line heading towards ground from the LED
cirucit?
so if there is a short and voltage gets applied to ground, then the zener
should blow preventing power from getting to the LED's.


.

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