[GreenKeys] Switch polarity

[Michael O'Day]

Scott,
 That would explain why I have had to "flip" a few outlets when plugging in
heavier appliances that use a right angle plug like my refrigerator and
dryer. I always cringe when I see a cord with that 180 degree bend. Odd
that they would pass inspection installed like that.

Mike O'Day
N9ODM

On Mon, May 29, 2017 at 12:20 PM, Scott Johnson <scottjohnson1 at cox.net>
wrote:

> Convention in the commonwealth seems to be up for off, everywhere else
> seems to be opposite.  In aerospace, up is on, for a vertical panel,
> forward is on, for an overhead panel, and outward is “on” for a side
> panel.  BTW, in north America, the grounding terminal on a NEMA 15  is
> SUPPOSED to be up, even the writing on the outlet bears this out, but I
> think design folks liked the “face” look, so down is common.  In some
> locales, and in Canada I believe, ground up is enforced.  The rationale is
> it is first to make, last to break, and you should be able to visually
> align the plug with the receptacle using the ground pin.
>
>
>
> Scott V. Johnson W7SVJ
>
> 5111 E. Sharon Dr.
>
> Scottsdale, AZ 85254-3636
>
> H (602) 953-5779
>
> C (480) 550-2358
>
> scottjohnson1 at cox.net
>
> scott.johnson at ieee.org
>
>
>
> *From:* GreenKeys [mailto:greenkeys-bounces at mailman.qth.net] *On Behalf
> Of *drlegendre .
> *Sent:* Saturday, May 27, 2017 8:34 PM
> *To:* WA5CAB at cs.com
> *Cc:* Green Keys <greenkeys at mailman.qth.net>
> *Subject:* Re: [GreenKeys] Switch polarity
>
>
>
> Pretty sure that "up for off" convention is a result of the Commonwealth..
> IIRC, many of the 3-pin Euro mains plugs expect the 3rd terminal to be up
> vs. down as in American systems.
>
>
>
> The one that always gets me, is the reverse standard for valving on
> locomotives. In most any case, a ball valve is open when the lever is
> parallel to the line (makes sense). But I was told this is the direct
> opposite of the railways, where the valve is open when the lever is
> perpendicular to the line.
>
>
>
> Confirm, deny, excoriate?
>
>
>
> On Sat, May 27, 2017 at 10:08 PM, WA5CAB--- via GreenKeys <
> greenkeys at mailman.qth.net> wrote:
>
> Because they are in the northern hemisphere?  :-)
>
> In a message dated 05/27/2017 21:30:46 PM Central Daylight Time,
> dave at horsfall.org writes:
>
> One thing that's been bothering me when watching old American films; why
> are their switches always upside-down i.e. flip it up for "on"?
>
> --
> Dave Horsfall DTM (VK2KFU)  "Those who don't understand security will
> suffer."
>
>
>
> Robert & Susan Downs - Houston
> wa5cab dot com (Web Store)
> MVPA 9480
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