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Transport Evolved

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Perhaps it's because businesses get 3-phase but homes don't?
Yes, that is basically the reason in the US.

Occasionally you do find a smaller business with 240V, but 208V from 3-phase seems more common at industrial locations.

[FONT=Verdana, Arial, Geneva]Nominal supply voltage for these sites: 208V[/FONT]
http://www.evchargernews.com/regions/90240_1.htm Office Max / Home Depot Downey
http://www.evchargernews.com/regions/91007_1.htm LA Arboretum
http://www.evchargernews.com/regions/92691_1.htm Mission Hospital
http://www.evchargernews.com/regions/92802_3.htm Disneyland Hotel
http://www.evchargernews.com/regions/92821_1.htm Brea Downtown Parking
http://www.evchargernews.com/regions/92832_1.htm Costco Fullerton
http://www.evchargernews.com/regions/92821_2.htm Brea Civic Center
http://www.evchargernews.com/regions/93401_3.htm Marsh St Parking, San Luis Obispo
http://www.evchargernews.com/regions/94025_1.htm Sun Microsystems Usability Labs
http://www.evchargernews.com/regions/94133_1.htm Hyatt Fisherman's Wharf
http://www.evchargernews.com/regions/94534_1.htm Solano Community College
http://www.evchargernews.com/regions/95616_2.htm Davis, 4th and G Plaza (Tesla)
http://www.evchargernews.com/regions/95620_2.htm Pitt School Road at I-80 (Tesla)
http://www.evchargernews.com/regions/95621_1.htm Citrus Heights City Hall
http://www.evchargernews.com/regions/95678_5.htm Costco Roseville
http://www.evchargernews.com/regions/95690_1.htm Walnut Grove Library
http://www.evchargernews.com/regions/95814_19.htm Sacramento City Public Garage
http://www.evchargernews.com/regions/95837_2.htm Sacramento Airport - Daily B
http://www.evchargernews.com/regions/95837_12.htm Sacramento Airport - Terminal A
http://www.evchargernews.com/regions/96097_1.htm Comfort Inn Yreka (Tesla)
 
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Whoever came up with that confusing 3-phase system, and why?

It was a chap by the name of Nikola Tesla, you may have heard of him :)

He figured out that with the right layout these confounded generators & motors could be made much more efficient and easier to connect over long distances. Not everyone agreed at the time but it seems that he may have been right after all: http://en.wikipedia.org/wiki/Three-phase_electric_power

Thing is, he also predicted that we would be able to supply the entire world with power, wirelessly, from giant antennas... which seems mad... or it did...
 
OK, but what does 3-phase have to do with a Tesla Roadster?

3-phase power is used in the roadster to drive the motor. Back to your original question; 3-phase is the native form of power that's delivered from the power stations to the grid. It's the standard used throughout the world, at different voltages and frequencies.

The roadster charges on single phase AC, stores it in the battery as DC and turns it into 3-phase to drive the motor.

You can obtain a single phase feed for the roadster from a 3-phase supply and, as that's more than likely found in business (per Teg) that's why we find ourselves charging from 3-phase.

At the end of the day, we need DC in the batteries of Mr. Tesla's namesake car yet it was he who pioneered 3-phase for generation. All the debate about which is best, 3-phase charging or DC charging is more about where you put the 3-phase to DC rectifier than any technical merit between the two electrical standards.
 
I have to say that I have largely stopped listening to/watching Transport Evolved. Why? Because the feed via iTunes is always corrupted in my experience. Typically 5-20 minutes into the show it jumps back and starts again at the beginning. This can happen up to a half dozen times (requiring fast forwarding over tens of minutes of material each time it does). This gets wearing. Listening in the car it gets potentially dangerous.

With the video feed via iTunes (rarely used by me) I see the video and audio get stuck at some frame and then never restart.

I have reported all of this to Nikki via [email protected], but never got an acknowledgement or saw any improvement.

I thought mentioning it here might raise the priority. I really appreciate the hard work Nikki puts into originating content. It's a real shame to see the hard work spoiled by some glitch, bug, or fault whether in the production process or on iTunes.