Garage Water Conditioner receptacle
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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!
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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1,324 Posts
What's the voltage of the breaker that turns that outlet on/off?
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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?
Agreed, probably low battery in the multimeter... Similar to Bolt going haywire when 12v battery is too low.
forum.allaboutcircuits.com
Multimeter reading wrong voltage
Recently my digital multimeter started acting up... I noticed this when a AA battery measured 1.7 volts :eek: It turns out that my multimeter (an old craftsman one) is giving out higher voltage readings than it should for any voltage. Any ideas on how to fix this?
forum.allaboutcircuits.com
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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1,469 Posts
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.
EDIT: No, it wasn't a crowbar protection, it was something else. Wish I paid more attention in electronics class.
Agreed, probably low battery in the multimeter... Similar to Bolt going haywire when 12v battery is too low.
Multimeter reading wrong voltage
Recently my digital multimeter started acting up... I noticed this when a AA battery measured 1.7 volts :eek: It turns out that my multimeter (an old craftsman one) is giving out higher voltage readings than it should for any voltage. Any ideas on how to fix this?
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.OK, so my 120V is actually 123V and my 240V is actually 246V.
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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774 Posts
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.
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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774 Posts
Well, that ’splains everything. And saves a lot of work.
Carry on. Nothing to see here.
Carry on. Nothing to see here.
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