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Old 09-26-2018, 11:16 AM   #591 (permalink)
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Quote:
Originally Posted by JSH View Post
It works in every house I've owned. An electrician converted two 120v single phase circuits in my electrical panel to one 240v circuit for my newly installed heat pump.

3 Phase Power vs Single Phase Power • OEM Panels

"Dual Phase or Split Phase power is also Single Phase because its a two wire Alternating Current (AC ) power circuit. In the US, this is the standard household power arrangement with two (Phase A, Phase B) 120V power wires (180 degrees out of phase with one another) and one neutral wire."
If he's doing that, he'd be using a capacitor to simulate a second phase.
It would be better (as in more efficient) to just connect the tesla on a high current breaker (like 30 amps or 50 amps if your line can handle it), and via software just ask the car to charge faster.

I don't know if they are limited in drawing up to 15 amps, or if they allow you to set the current?

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Old 09-26-2018, 11:51 AM   #592 (permalink)
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Quote:
Originally Posted by ProDigit View Post
If he's doing that, he'd be using a capacitor to simulate a second phase.
It would be better (as in more efficient) to just connect the tesla on a high current breaker (like 30 amps or 50 amps if your line can handle it), and via software just ask the car to charge faster.

I don't know if they are limited in drawing up to 15 amps, or if they allow you to set the current?

Nope. Just a $10 2-pole circuit breaker like this one



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Old 09-26-2018, 01:12 PM   #593 (permalink)
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Quote:
Originally Posted by Piotrsko
Some blurring of lines: the classic datsun 210 in stock form is an econobox, in ralley form is considered a racing sport car.
Perhaps the 510?


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Old 09-26-2018, 03:08 PM   #594 (permalink)
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Define "sports car". Define "economy car". Please.
A sports car is designed with nimble handling as its primary objective. In addition, it will usually (though not invariably) be a small, 2-seat convertible. Current examples would include the Mazda Miata - indeed, some would say that it's the definition :-)

Likewise, an economy car is designed with low cost of operation - principally fuel economy - as the primary objective. Performance & handling are secondary considerations.

Now there can often be some overlap here. The small 2-seat configuration, and the lightness* that helps confer nimble handling, tends to make sports cars pretty good on fuel economy - at least when they're not over-engined. And a light economy car can have good handling, too.

"Simplify, then add lightness" - Colin Chapman's design dictum: https://www.lotuscars.com/about-us/lotus-philosophy
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Old 09-26-2018, 03:27 PM   #595 (permalink)
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I've dreamed of the Lotus Elise, but I'd kill myself for sure, at least if it handles anything like it does in Gran Turismo. Seems to be very unforgiving when pushed past the operating limits, but then again the same can be said of my motorcycle.

I chose my TSX since it's a 4-cylinder engine with 200+ HP, but returns 30 MPG, has good handling, many amenities, Honda reliability, and a beautiful (but too close ratio) 6-speed manual. It's very good at most things, and master of none.

Where does the Model 3 land? Is the suspension stiff enough to be considered sporty? I know people say the Chevy Bolt has a firm suspension. Is it sporty? Maybe it's just a "hot hatch". Many ways to classify something.
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Old 09-26-2018, 03:51 PM   #596 (permalink)
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Old 09-26-2018, 06:31 PM   #597 (permalink)
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Quote:
Originally Posted by ProDigit View Post
If he's doing that, he'd be using a capacitor to simulate a second phase.
It would be better (as in more efficient) to just connect the tesla on a high current breaker (like 30 amps or 50 amps if your line can handle it), and via software just ask the car to charge faster.

I don't know if they are limited in drawing up to 15 amps, or if they allow you to set the current?
I'm not following what you are saying about simulating a 2nd phase, or who you're referring to.

Tesla charging amps can be set to a specified limit to prevent overloading the circuit.

Would you please just take a quick snapshot of your breaker panel. $10 says you can plop a 240v breaker in there no problem. Maybe I should reverse bet so that when I'm wrong, you can take that $10 and buy the 240v breaker.
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Old 09-27-2018, 10:35 AM   #598 (permalink)
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Easy analogy: capacitor start single phase motor windings. You use the capacitor to "shift" the apparent voltage leading edge some amount of degrees, but it can also double apparent voltage at I believe 90 degree offset.
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Old 09-28-2018, 12:50 AM   #599 (permalink)
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Quote:
Originally Posted by Piotrsko View Post
Easy analogy: capacitor start single phase motor windings. You use the capacitor to "shift" the apparent voltage leading edge some amount of degrees, but it can also double apparent voltage at I believe 90 degree offset.
Well said.
The Tesla won't be fast charging if you have a single phase outlet, connecting to a 4 or 5 prong; because there is no voltage difference between the pins (only L1 and ground (or L2-ground, or L3-ground).

The only way using multiple outlets would work in charging the car is:
  1. If the car can be configured to charge beyond the 15A a normal breaker provides on a single line, or,
  2. If there is a phase difference between L1 and L2.

The phase difference can only be gotten with a rated capacitor, or with an extra line.
The capacitors used in AC systems or motors of the kind, usually are fixed value, which means they're meant to run on a fixed load.
Once the Motor RPM varies chances are that the motor isn't running optimally anymore.
With a Tesla, using almost all the power your home net can support.
With single phase and a cap, there will be additional losses.

Last edited by ProDigit; 09-28-2018 at 01:11 AM..
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Old 09-28-2018, 02:10 AM   #600 (permalink)
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Quote:
Originally Posted by ProDigit View Post
Well said.
The Tesla won't be fast charging if you have a single phase outlet, connecting to a 4 or 5 prong; because there is no voltage difference between the pins (only L1 and ground (or L2-ground, or L3-ground).

Attached is the wiring diagram for the Level 2 charger I was going to buy.

ChargePoint CPF25: Plugs into a 3 prong NEMA 6-50 outlet... Connected to a 240V 40 amp circuit breaker... in a single phase panel.

Charging Output: 7.7kW (240VAC @ 32A)

https://amzn.to/2qwfLCo

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