# oscilloscope without wire ground

T

Jan 1, 1970
0
Em terça-feira, 30 de julho de 2013 02h01min58s UTC-3, Phil Allison escreveu:
"Tom Biasi"

** Of course they are not the SAME !!!!!!!

Neutrals ARE current carrying conductors.

Safety grounds are NOT, until a fault condition arises.

... Phil

Phil

I'm from Brazil and here N= Neutral ; L1 =220V (-120º); L2=220V (0º) and L3(+120º) therefore L1 in oscilloscope will be GND and L2 the prove.
Is it possible with the wire groud conected in the jack?

P

#### Phil Allison

Jan 1, 1970
0

I'm from Brazil and here N= Neutral ; L1 =220V (-120º); L2=220V (0º) and
L3(+120º) therefore L1 in oscilloscope will be GND and L2 the prove.

** My god, the fool IS mucking about with 3 phase power !

Is it possible with the wire groud conected in the jack.

** Question time:

Have you got a dual trace /channel scope with "invert" function on one
channel ?

Do you have two 10:1 probes ?

BTW:

3 phase power is VERY DANGEROUS !!!

Beginners should NOT be touching it.

.... Phil

T

#### Tom Biasi

Jan 1, 1970
0
"Tom Biasi"

** Of course they are not the SAME !!!!!!!

Neutrals ARE current carrying conductors.

Safety grounds are NOT, until a fault condition arises.

... Phil
I made my point clear Phil.

You said, "Neutral conductors are always linked to ground at the service
box."

I said," In the USA neutral and ground are "usually" connected at the
service box but not always."

That's clear enough.
No need to go beyond that.

Tom

P

#### Phil Allison

Jan 1, 1970
0
"Tom Biasi"
I made my point clear Phil.

** Clear as mud - pal.

You said, "Neutral conductors are always linked to ground at the service
box."

I said," In the USA neutral and ground are "usually" connected at the
service box but not always."

That's clear enough.

** NO it is NOT !!!!!!!!!
No need to go beyond that.

** It must be connected to ground somewhere - or else it is simply NOT a
neutral.

Ever see the movie "Groundhog Day" ??

.... Phil

T

Jan 1, 1970
0
Em domingo, 28 de julho de 2013 15h49min54s UTC-3, Tobias Gadelha escreveu:
Is there any risk to use oscilloscope without wire ground? Because with wire ground there is a short circuit when I use GND on the line.

ok people, resolved. thanks

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