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vvc0
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Re: She may be an engineer if...
vvc0   2/20/2015 12:09:59 PM
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Heh, well, Texas hasn't become the entire USA yet, unless something happened overnight to change that. Texans may have to return all their Corningware and other cookware, though, since it too could perform some of the functions of facilitating manufacture of drugs. Gotta love Gov'ment.

GSKrasle
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Re: She may be an engineer if...
GSKrasle   2/20/2015 11:43:02 AM
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I think that mug is probably illegal (without a license) in the USA:

https://www.txdps.state.tx.us/RegulatoryServices/narcotics/narcprecursor.htm

http://www.crscientific.com/texas-glassware.html

 

mhrackin
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Re: ...an engineer if...
mhrackin   2/20/2015 11:20:35 AM
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@zeeglen:  The primary reason for the co-existence of (to use the official names) 117 and 234 VAC residential wiring is that the absolute maximum load supported by ANY 117 VAC outlets and other wiring devices is IIRC 30 amperes. That's a nominal load maximum of ~3.5KW, and the devices for that current level are intentionally incompatible with "standard" 2 or 3 prong plugs. 

Recent editions of the National Electrical Code (NEC) specify 20 amperes as the standard breaker rating for household branch circuits for outlets (even though the usual individual plugs and sockets are rated for 15 AAC).

BTW, I think that the "official" domestic outlets in Japan are supposed to be 100VAC nominal (just to be different).

Re;  using an electrical appliance while standing in a puddle or lying in a bathtub...."

There are much more likely places where use of hand-held tools, appliances, etc are common and there is a REAL danger of shock are basements and garages!  That's why they too are required by NEC to have GFI.

 

zeeglen
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Re: ...an engineer if...
zeeglen   2/20/2015 9:50:47 AM
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@mhrackin most clothes dryers require 220VAC

Stoves and ovens too. I think that 1 of the 2 phases is sent to most other household outlets is because it is a bit safer, 110VAC is less likely to kill someone who accidentally comes into contact with a live wire than 220VAC.

Of course one side of the 220VAC to ground is still 110VAC.  I believe that in Japan neither side of the 110VAC is grounded, which is probably safer all around, in the days before GFI less chance of getting killled when using an electrical appliance while standing in a puddle or lying in a bathtub.

CC VanDorne
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Re: You May Be an Engineer if...
CC VanDorne   2/20/2015 9:03:50 AM
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Yes, @olearydq, it was nice knowing you.

CC VanDorne
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Re: ...an engineer if...
CC VanDorne   2/20/2015 9:00:56 AM
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Oh, easy...for that we used the third standard...3-phase.  Go back and look at the video.  If you look close enough you'll see the wire going to the rocket.  All the rest of it was smoke and mirrors.

David Ashton
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Re: ...an engineer if...
David Ashton   2/19/2015 6:07:24 PM
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@MHRackin... TWO standards for domestic electricity!!  How did you guys get a man on the moon?? :-)

mhrackin
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Re: ...an engineer if...
mhrackin   2/19/2015 5:44:53 PM
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@davud: In the USA, most clothes dryers require 220VAC!  Less than 12 Amps. Likel;y true elsewhere, as 220 V seems to be more of a global standard for residential use for everything (except for Japan....).

David Ashton
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Re: ...an engineer if...
David Ashton   2/19/2015 5:34:51 PM
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@CC... 2600 W at 110V is 23.6 Amps....that's a big fuse (you'd need 25A or more).

I guess (if you were an engineer) you could bypass the fuse with a bit of medium gauge stranded wire and it would work just as well :-)

Duane Benson
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Re: ...an engineer if...
Duane Benson   2/19/2015 4:46:30 PM
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"...instead of calling the Maytag man you simply bypass the blown safety fuse on the unit's 2600 watt electric heater..."

If, when the clothes dryer stops working, you no only instantly know it's a blown thermal fuse, but you have one buried in your tool box, you might just be an engineer

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