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O.T. HD, PSU review:



 
 
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  #166  
Old January 5th 19, 11:21 PM posted to microsoft.public.windowsxp.general
Paul in Houston TX[_2_]
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Posts: 999
Default O.T. HD, PSU review:

Bill in Co wrote:
Paul wrote:
Bill in Co wrote:
Paul wrote:
Mark Twain wrote:
You have to ask Paul about that stuff.

Robert

Well, I don't know where your Safety Ground is
coming from, on the three prong outlets you
do have installed.

Two-prong versus three-prong is an odious topic,
that's for sure.

Paul

Just out of curiosity, could someone simply connect the center slot to
the large slot (which is normally at ground potential) as a kludge, even
though it's a bad idea and obviously against code?


I'm thinking that's a bad idea.

If there's a fire at your place, and they spot that,
it could invalidate your fire insurance.

The surge arrestor isn't going to work right either.
It might not have the same protection characteristics.

And you could have a "shifted neutral" fault. Neutral could
be lifted above ground. Since hot and neutral extend outside
your house, there are more options for mischief. They don't
have to stay at their nominal potentials. A tree could fall and...

Paul


And just to set the record straight, I hope no one even dares to do this,
but I was just curious, and wonder if anyone ever did such a hack.
Hopefully not!!

Where and how is that neutral normally grounded, anyways? Right outside the
house, via some metal rod going into the ground, a few feet down? I'm
guessing that's it.


To answer your question, yes, it is possible but dangerous. Without testing
each wire first there is no way of knowing if parts of system are properly
grounded and parts are not. Connecting the outlet white to green or to the
outlet metal box could potentially energize the house ground, water pipes,
or mobile home framework.

I work with this stuff regularly across the usa and Canada.
If you open the breaker panel you will find that there may be one or more
busbars on the right and left of the breakers or at the bottom of the box.
The green is usually on the bottom. Notice that both white and green are fastened
to the breaker box metal. The neutral leg of the 240 will also fasten to the metal
of the box. There should also be a good sized solid wire from the green going to
a metal stake in the ground. The stake depth depends on the average
soil resistivity, however 9' (3m) is a good drive depth for 3 ohms or
less soil resistivity. On our industrial projects (and my house and garage)
we drive several stakes. In addition, the incoming down pole will have its
own ground wire with a coil under the pole. A good number for neutral and ground
connectionsis less than 1 ohm. The outlets should have less than one ohm between
breaker panel ground and the outlet neutral and ground wires. There should be less
than 1 ohm between panel ground and neutral wires. Nearly all industrial equipment
specifies 2-3 neutrals and 2-4 ground wires. That is to prevent a "shifted neutral"
as Paul NoSpam mentioned. Running more than 120 to 240 split phase through the 120
single phase equipment is really destructive. We had an electrician do that once
years ago and we lost about $15,000 in a pop and flash. Since then I personally
inspect and test the wiring on all of my projects before powering up.

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  #167  
Old January 7th 19, 06:18 AM posted to microsoft.public.windowsxp.general
Mark Twain
external usenet poster
 
Posts: 2,402
Default O.T. HD, PSU review:

Just to let you know I changed my nick to
'Robert in CA' (it seemed more appropriate
than Mark Twain).


Robert
  #168  
Old January 7th 19, 06:23 AM posted to microsoft.public.windowsxp.general
Mark Twain
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Posts: 2,402
Default O.T. HD, PSU review:

This is just a test to see if it works
(no need to reply)

Robert
  #169  
Old January 7th 19, 07:38 AM posted to microsoft.public.windowsxp.general
Bill in Co[_3_]
external usenet poster
 
Posts: 303
Default O.T. HD, PSU review:

Mark Twain wrote:
Just to let you know I changed my nick to
'Robert in CA' (it seemed more appropriate
than Mark Twain).


Robert


Or even just Robert. I don't see any other Roberts in here.


  #170  
Old January 7th 19, 03:18 PM posted to microsoft.public.windowsxp.general
Paul[_32_]
external usenet poster
 
Posts: 11,873
Default O.T. HD, PSU review:

Mark Twain wrote:
Just to let you know I changed my nick to
'Robert in CA' (it seemed more appropriate
than Mark Twain).


Robert


How you operate the Google Groups interface on your
end, may not change every aspect of how you appear
on USENET software clients.

In Google Groups, there may be a "show original message"
option or equivalent, and that shows the textual content
available for USENET users to see.

If I use Howard and enter the MID of your current
message, I can show you what we see on our side. It
looks roughly like this.

http://al.howardknight.net/msgid.cgi...egroups.com%3E

Paul
 




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