On Mon, 12 Nov 2012 05:52:57 -0600, The Daring Dufas
I use two metal soup cans and over 20 miles of string between them. I
hear my data one byte at a time, write it down, and wait for the next
byte. When I get all the bytes, I have to punch them into punch cards
and put the card into a punch card reader. After half a day, I get a
printed black and white photo of someone. This high technology is real
amazing. I hear someday they will run that string across the ocean.
I'm not sure why, but I bet it's so we can listen to fish talk to each
On Sun, 18 Nov 2012 12:14:40 -0500, email@example.com wrote:
You can chain a neutral through a device unless it is a multiwire
circuit. There is no rule at all about grounding conductors beyond
"Electrical equipment and wiring and other electrically conductive
material likely to become energized shall be installed in a manner
that creates a low-impedance circuit facilitating the operation of the
overcurrent device or ground detector for high-impedance grounded
If the device manufacturer provides 2 screws, you can chain through
that device. It is common to see the ground looped through the single
screw and continuing on to the next one.
On Sun, 18 Nov 2012 12:36:57 -0500, firstname.lastname@example.org wrote:
I didn't say that it wasn't to code. OTOH, it's terrible practice. An
inspector I had would have failed me for using both neutral screws. He
probably would have condemned the place had I daisy-chained grounds.
My guess is that if you replace the receptacle while the circuit is live
you break the ground downstream. The same is true of the neutral. You
can have a "hot" neutral or ground downstream. A hot neutral is not
likely to be a problem (except for the person changing the receptacle).
A hot ground, even for a short time, can be fatal.
For multiwire (Edison) circuits you are not allowed to connect the
neutral through the receptacle. It has to be spliced separately, and a
single neutral wire connects to the receptacle. If replace the
receptacle hot, and break the neutral, one downstream leg-to-neutral can
wind up at 240V and the other 0V.
On Sun, 11 Nov 2012 18:48:13 -0600, email@example.com
This one did, but was only used to connect the outlet ground
lug to the outlet box.
The thought of dissimilar metals seems like a sure miss to
me (for a dependable connection). And the fact that a nail
used to hold the outlet box to the stud is never going to be
dependably tight--the box gets pushed and pulled every time
something is plugged in or unplugged. Especially when the
studs are soft redwood.
When I wired up my garage, I put 2x4s spanning between
studs, and screwed the boxes to those. None of those boxes
are wiggly at all!
It works long enough to get paid for the job, anyway.
In this case, the separate, bare ground was wrapped around
the nail used to mount the box to the stud. This couldn't
have been done post-construction, as there is no evidence of
the sheetrock having been disturbed, and the nail is
And have a direct connection from ground to the recepticle,
as opposed to chaining the ground thru the box (says this
Copper to steel still sounds like a questionable technique
to me, even tho I know it is still the most common (only?)
way of grounding steel boxes. The slightest bit of
moisture.... And if you live near the ocean?
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