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Discussion Starter #1 (Edited)
Just tested my water conditioner outlet in the garage. OEM EVSE lights up. Took a reading and it shows 196v. Have not tested it. Will this work for charging?

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Discussion Starter #2 (Edited)
Tested... it was only charging at 1-2KW on the display, so I think it's a NEMA 5-20 outlet... not a NEMA 6-20. :(
 

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196 volts just doesn't seem right. That's not a correct voltage from my limited understanding of voltages present in US homes. Try a different meter ..... ?????
 

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Definitely a 5-20. A 6-20 outlet would have a horizontal slit on the right, not vertical.

196V is highly suspicious. If true (and not a bad meter), that's dangerous on a 5-20 outlet. That's a good way to blow things up. Fortunately, your EVSE and car will be fine, but don't plug in a normal 120V appliance!
 

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meter might be fine. but reading across hot and neutral while the device is plugged in might be the issue.
 

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meter might be fine. but reading across hot and neutral while the device is plugged in might be the issue.
Ok, you've piqued my curiosity. What is going on inside that EVSE that would boost the apparent voltage like that, especially without the car plugged in? I know adding to an active circuit will mess with resistance measurements, but Voltage? Do explain.
 

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Ok, you've piqued my curiosity. What is going on inside that EVSE that would boost the apparent voltage like that, especially without the car plugged in? I know adding to an active circuit will mess with resistance measurements, but Voltage? Do explain.
I was just speculating that it might cause the digital meter to read incorrectly. Some kind of current loop or something. But the more I think about it, the meter has to be faulty. Low battery?
 

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Discussion Starter #10
Agreed, probably low battery in the multimeter... Similar to Bolt going haywire when 12v battery is too low.

 

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Discussion Starter #12 (Edited)
How is he getting 2 kW charge rate then? Not possible at 120v and 12a.

This mystery needs resolution.
My house may be on an ancient pyramid site. During spring/fall, I use 7-10KWh a day and max 40KWh during the hot summer. Other houses are use 20-30KWh a day during spring/fall and 70-100KWh a day during summer. IDK. :)
 

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I've had meters that had bad ranges, especially Radio Shack ones. Try your meter again on a known good NEMA 5-15 outlet using the 200V range, then try again on the 600V range. They should be roughly the same, +/- a few Vac. If the 600V reading shows more than 20 Vac difference from the 200V range, your meter is faulty. Also, are your probes clean? I've been handed some pretty tarnished probes before and simply rubbing the probes against whatever you're measuring can break through the tarnish and yield better measurements. I only did this for measuring resistance, however. When rubbing the probes, don't go overboard and accidentally bridge contacts. I found out the hard way...crossbar (I mean crowbar, **** I'm old) protection worked though!

EDIT: No, it wasn't a crowbar protection, it was something else. Wish I paid more attention in electronics class.
 

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Discussion Starter #14
Agreed, probably low battery in the multimeter... Similar to Bolt going haywire when 12v battery is too low.


OK, so my 120V is actually 123V and my 240V is actually 246V. :)
 

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OK, so my 120V is actually 123V and my 240V is actually 246V. :)
What is the make and model of your meter? There are a lot of meters that aren't really that accurate, but nonetheless awesome tools just the same because they tend to be relatively accurate if using a base line.
 

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Discussion Starter #16
What is the make and model of your meter? There are a lot of meters that aren't really that accurate, but nonetheless awesome tools just the same because they tend to be relatively accurate if using a base line.
Did not note the brand. It was borrowed from an electrician's toolbox so I think it's good.
 

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Did not note the brand. It was borrowed from an electrician's toolbox so I think it's good.
Fair enough, just your numbers don't pass the smell test for being correct and was thinking of chalking it up to the meter versus human error.
 

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Measure the outlet voltage without the EVSE connected, loading it. It’ll probably be closer to 220-230V. BTW, that’s a cheap Radio Shack Meter. It’s the 1980s equivalent to the free ones Harbor Freight gives away Or sells for $3.

Voltage drop occurs when the wires are carrying a load, like the 12A the Bolt can draw (I^2*R baby). If that outlet is a long way from the CB or wired with 14ga wire instead of the proper 12ga for a 20A outlet then that would help explain the 196V. While low, it’s not completely out of spec.

Verify the wire gage then put on the proper outlet for 220V or label the heck out of it for safety.

FYI, the Bolt EVSE will probably work with any voltage from 100-250V. The Bolt will draw the same amps based on its setting no matter the voltage. It’s just the power it receives that will vary.
 

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Discussion Starter #19
Measure the outlet voltage without the EVSE connected, loading it. It’ll probably be closer to 220-230V. BTW, that’s a cheap Radio Shack Meter. It’s the 1980s equivalent to the free ones Harbor Freight gives away Or sells for $3.

Voltage drop occurs when the wires are carrying a load, like the 12A the Bolt can draw (I^2*R baby). If that outlet is a long way from the CB or wired with 14ga wire instead of the proper 12ga for a 20A outlet then that would help explain the 196V. While low, it’s not completely out of spec.

Verify the wire gage then put on the proper outlet for 220V or label the heck out of it for safety.

FYI, the Bolt EVSE will probably work with any voltage from 100-250V. The Bolt will draw the same amps based on its setting no matter the voltage. It’s just the power it receives that will vary.
The 196V is in error. The outlet is actually 123V.
 
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