I think you misunderstand his post ... he's ranting against those who describe the electrical requirements with a reference to "100 amp wire". So you're actually in agreement with him.
My bad, then. Safety and enjoyment are what counts!
Hi Hydbob - Point #4 - regarding the scheduled charging. We hardwired the installation of our ChargePoint HomeFlex so that we can benefit from the discount plan from our utility company and setup the time to start charging the car. With the charging plug in the Lucid GT, we have the Chargepoint app scheduled to start at a particular time. Until it is time to start, we are getting an error message from our Lucid app. We have not been able to get the charging to start at the designated time and have to manually get the charging to start. Do you know if the current Lucid software system does not allow to schedule a start charging time or are we missing something in our set up?
Current software does not.
Also, the scheduled charging via your EVSE was working with no error prior the the last few updates. It's a known bug and right now for Chargepoint, you will need to wale the car up at scheduled time or unplug and plug back in during your optimal TOU rates. Annoying. Yes. But it's a known bug that Lucid is working to fix.
Inadequate regression testing after software modification. Should be able to quickly fix this software bug introduced by another software mod.
It's a complete rewrite, so not quite the same
Thank you. Now we wait, it would be nice to have that feature soon.
Thank you. That's what we've been doing, waking up the car and/or manually plugging it in.
Well I did hire a professional of some (local) repute, and told him I had ordered an 80 amp EV charger ( Lucid Connected Home Charging Station) that required an 100 amp hardwire line. I also told him I wanted to "future proof" the garage because the charger was bi-directional. He'd never heard of Lucid but I saw him look it up on the website. It cost me over $5000. I had the installation inspected by the municipality's hired gun and he approved the work.
Ask warrantee redo. #4, and 75 deg breaker (likely what you have) has ampacity 85 A. Next size breaker is allowed by code. This size is 90 A. If he set up the charger at 80 A, and your breaker is a 80 % breaker (very likely what you have), 125 % amp breaker is needed. This is 100 A breaker. The installation is an NEC violation. You could call the city inspector for your permit to verify all facts are ok.
Ouch! Now I feel doubly bad. Can you ask the inspector on what basis did he/she accept #4AWG on a 100-amp circuit?
Again, the "hired gun" township inspector barely looked behind the sub- panel. When he confirmed who did the work he pretty much signed the forms and gave me a sticker. Never looked at the main panel or the cable spec. to the garage sub-panel. The work order states "install 100 amp copper line to garage" but does not itemize or state the cable size/rating. I deliberately did not hover around or ask questions while the electrician worked. I did not think it would be necessary to explain how a car charger works, and I thought "100 amp cable to support 80 amps continuous 30 meters away" was enough clarity for a lay person talking to a professional. I was not aware that there are (at least) 4 cable sizes that are considered "100 amp", so I did not see my error in not itemizing and specifying what cable I wanted. I thought that was the reason you hired a pro. I was wrong, and I did not know that the inspector just approves any work done by an established company without even looking.
Your contractor installed #4 Romex which is equivalent to NM-B, rated at 70A. Now, you have to downgrade that by 20% which leaves you at 56 amps. Find the setting that is the closest LOWER number on the Lucid charger. You're not done yet. The #4 Romex wired to a 100A breaker violates the electrical code. You need to replace that with a 70A (or lower number) breaker to meet code.
I reread your message and your intent is to have two-way power sharing from your Lucid charger. If so, you will have additional hardware (and expense) such as an isolation (transfer switch), along with associated wiring. Those on the forum with Tesla wall chargers can give you the details. More wiring to come if that's your plan, but the wiring from/to the Lucid charger and isolation switch should be short. If you plan on a battery power wall, more wiring but should be internal between the switch and the power wall.
You weren't wrong at all. When a non-electrical person says 100 A wire, he/she means the load needs 100 A CB -- a 100 A circuit. (There's no such thing as a xxx A wire but dependent on the wire and its installation conditions and NEC.) The electrician is then to verify load nameplate -- Full Load Amperes. Let's say it says 80 A. The electrician is now to determine whether it's continuous (more than 3 hours) or non-continuous load. Since the charging will frequently take more than 3 hours, it's continuous load. Now, due to continuous and by NEC, you must do 80 A x 125 % = 100 A circuit. The CB and cable (and whatever else you have) must have 100 A rating.
Your electrician should have gotten this right. I would force him to come back out and fix it.
You could be right, but I assumed 90°C. Yes, for 60 °C that column needs to be used in the screenshot. I just looked up a typical NM-B up online and got 90°C. Cable part # and then data sheet would be needed to be absolutely sure or if printed on cable. I believe it used to be 60°C for (older) NM-B. See screenshot for Ampacity for redlined AWGs and temps and copper cable. Ampacity isn't to be confused with circuit ampere or CB ampere rating. Ampacity (for non-electrical people) can be viewed as maximum current the cable can carry under "ideal" installation conditions. Ampacity gives a hint of "maximum possible". Typical Ampacity deratings are ambient temp (above 30°C), number of current carrying wires in cable/conduit/raceway, installation on top of roof in direct sunlight, etc. Voltage drop for long runs is another consideration but typically not needed for 240 V and within a normal house size.
