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Questions tagged [electric-vehicle]

Plug-in electric vehicles can use a variety of chargers. These chargers are often high-current, 240V installations and typically require dedicated circuits. Chargers may be hard-wired or plug in to sockets. Specifics vary by manufacturer and vehicle model.

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Installing Nema 14-50R Outlet In Garage

Our garage has a panel but no main breaker, instead what would be the "main" is a 60 amp breaker in the basement panel. If I want to install a 50 or 60 amp breaker on the garage panel, would ...
3 votes
4 answers
5k views

40A GFCI Breaker keeps tripping when charging EV after about 1.5 hours

I had an electrician come and install a NEMA 14-50 outlet (on a 40A GFCI breaker) for an EV charger. I have the 32A charger that plugs into it, but it is also plugged into a 30 ft 50Amp RV extension ...
0 votes
3 answers
8k views

What wire do I need for a 48A EV charger?

I have my electrical panel in my drywalled garage, and want to install a 48A EV charger on the wall next to the panel. My plan was to run wire through the bottom of the panel, sideways through one ...
1 vote
1 answer
52 views

Connection of Protective Earth in EVs [duplicate]

I am new to this forum and this is my first question. I am reading about the Electric Vehicle and their charging. I went through this link - J1772, where the connector image is displayed. The ...
2 votes
2 answers
57 views

6-20 or more convenient 6-50 receptacle for 16 amp EV charging while travelling?

I have a (new to me) Chevy Bolt and will soon receive a Dewalt 16 amp, 240 V portable EVSE with a 6-20 plug. My in-laws live about 220 km/150 miles away, so in range without a top-up but need to ...
-3 votes
2 answers
100 views

Finding the perfect home-cum-portable EV charging solution [closed]

As an EV6 owner, I've been looking for a charging solution that meets my home charging needs and is portable and easy to use.I would like to share my needs with you here and hopefully get some ...
9 votes
3 answers
2k views

Is this 240v circuit to garage for electric charger good or did I miss something?

I'm adding a circuit to my garage for an EV charger. Yes, I have pulled a permit. I live in Massachusetts. Here's my plan: I'll be adding a new 60 amp GFCI breaker to the panel. Yes, there is space in ...
1 vote
0 answers
48 views

grounding rigid conduit (RMC)

Does a run of electrical rigid metal conduit (RMC) need to be grounded at both ends, if I am not using it as the circuit ground ? For context, I am putting a electric vehicle charging station (EVSE) ...
3 votes
3 answers
8k views

Running 100 amp line to detached garage

I found lots of questions about this, but with many different answers. I'm looking to run a 100 amp line from my 200A main breaker box to a subpanel in my new detached garage. The run is about 120 ft....
1 vote
1 answer
103 views

EVSE terminal torque specs and associated wire size

For installation of a Tesla Gen 3 EVSE the manual requires the terminal screws be tightened to 50 lbf.in torque and recommends wire from #12-#4 gauge with #6 gauge wire used for a maximum possible ...
3 votes
2 answers
1k views

Is there a problem oversizing a circuit for a car charger?

I am wiring a Tesla wall connector with #6 gauge THHN in conduit and installing a 60 amp breaker to allow for a max 48 amp charge. If I only need a 48 amp charge every so often and choose to ...
0 votes
1 answer
97 views

Can I use LFNC to supply an EVSE on the exterior wall of my house?

I'm trying to add a Level 2 EV charger (EVSE) to my home in the least expensive way possible. The Grizzle-E charger can output 40amps, so I'm planning on supplying it using a 50amp breaker with 6awg ...
-1 votes
1 answer
105 views

Which EV charging circuit option sounds reasonable? [closed]

So I have a VW ID.4 on order. For a Level 2 charging circuits, here are the options I have near garage and I need your advice. My options: I have a dryer outlet with 30A circuit in a laundry that’s ...
0 votes
2 answers
144 views

Tesla model 3 6-20 charging from existing circuit

I have a 20amp double pole 240v breaker suppling power to my 120v dishwasher and garbage disposal. They share the same circuit. It’s 12-3 awg and I have a access to this circuit before it runs to my ...
2 votes
4 answers
1k views

Leviton 14-50 Works, Bryant 14-50 Doesn't - Same Wiring

Question for you all. Kinda at my wits end with this one, it just doesn't make any sense to me. I have had the issue of my Tesla charger dropping down to 16 amps from 32 amps after 30 minutes due to ...
1 vote
1 answer
137 views

using IMC electrical conduit to re-locate an EVSE

I want to re-locate our electrical vehicle charger (EVSE), which is now on the side of the house and located pretty inconveniently. I want to move it to the edge of the gravel parking area. To do that,...
0 votes
3 answers
1k views

Does an outdoor outlet for EV charging need a weather-proof box and a GFCI?

I have some leftover 12/2 cable and a desire to install an outdoor EV charger at my home. I'm trying to figure out the best way to make this work, without being too expensive. I'm thinking of ...
1 vote
3 answers
493 views

Help in understanding capacity of split bus breaker panel with sub panel

My home was built in 1978 (USA, Washington State), and has a split bus panel for the main breaker box. It also has a separate subpanel, which I'm not sure if it is original or added later. I am a ...
6 votes
4 answers
8k views

EV charger wiring - sub-panel requirements

I am looking to add a 30A outlet in my garage for the purpose of charging an EV. My home has 200A service coming through the main panel, and currently there are no sub-panels except one for the ...
1 vote
1 answer
611 views

Is the wiring on this NEMA 10-50R incorrect?

While looking into EV charging I noticed I had a 240V receptacle (Leviton 10-50R) conveniently located right beneath my main panel. After some research (I have little to no electrical knowledge), I ...
-1 votes
3 answers
1k views

Need confirmation of level 2 charging with 10 gauge wire

My condo was built in 2021 and the builder told us it was wired for automobile charging. Now we are finding out that the wiring provided is only 10 gauge. Since our garages are downstairs and under ...
1 vote
1 answer
234 views

Hardwiring a 240V, 60A circuit right behind electrical panel

The breaker panel is on the outside wall of my garage, right opposite the spot I want to hardwire an electric vehicle charger (EVSE). The charger would be in the garage. My plan is to drill a hole in ...
7 votes
1 answer
994 views

How to properly run a EVCE circuit for Tesla Wall Charger in an unfinished garage

I have a 200A Square D QO (US-Maryland) primary panel and I’d like to install Tesla Wall Charger in my unfinished garage with exposed wood studs and be able to operate at its highest rating, which is ...
5 votes
1 answer
915 views

AC line voltage sharing conduit with DC conductors for solar PV

I have an existing solar PV system; conduit to the house carries DC pairs for two "strings" of solar panels plus EGC ground. It'd be very convenient for wiring of an EV charger (EVSE), if I ...
1 vote
1 answer
631 views

Details on installing 240 volt line to garage for emergency generator and future EV charging

High level background: I have inherited a very well maintained generator from my father-in-law (Troy-Bilt 5550). He had a 240v outlet in his garage in the event that he needed to use the generator ...
2 votes
2 answers
2k views

What is the busbar rating in my main service panel?

I don't understand the difference between "device rating" and "meter socket rating" on my MSP? I'm most interesting in the busbar rating? Here are pictures of MSP: https://...
5 votes
2 answers
2k views

How do I test for voltage drop?

I have a Tesla that I'm plugging in at work (NEMA 5-20 outlet) and my EV says I'm getting between 107-109 volts. NEMA 5-15 adapter registers 12 amps, and the NEMA 5-20 adapter, which should be 16 amps,...
5 votes
3 answers
773 views

How much power can I supply for an EV charging circuit? [closed]

I would like to install an EVSE. The main panel is in the garage and I should have no problems running conduit a few feet to the location where I plan on mounting the charger. I will make sure I get ...
10 votes
2 answers
718 views

80amp EVSE on subpanel

I’ve got a trivial problem that has become complicated by a non-trivial setup. My goal is to install an 80amp (100amp breaker) EVSE to charge my electric truck. An incentive from my electric ...
-1 votes
1 answer
67 views

Level 2 EVSE - Tesla or J1772? [closed]

We own two EVs, a Tesla and a Nissan Leaf. We charge them mostly at home, using a hardwired Level 2 EVSE (which provides high-current 240vac to the actual charger, located in the car). The Tesla ...
4 votes
3 answers
412 views

sizing a Level2 EVSE to add to an existing subpanel

I have an existing 40-amp subpanel: a 125-amp main-lug load center, wired to a 40-amp breaker in the main panel with 8-3 NM-B. The subpanel has one existing load - a minisplit heat pump. I wish to ...
7 votes
2 answers
2k views

What current capacity does 6 AWG AL TYPE SE have for an EV charger?

We recently finished our basement and had electrician run a cable to the garage for an electric vehicle charger that terminates in a junction box in the garage. From the 200A panel the cable is ...
22 votes
7 answers
34k views

Why does Tesla recommend such a small gauge wire for their chargers compared to this chart I found online?

We are looking to install two NEMA 14-50 outlets for our kids to charge their electric cars, and I'm confused about wire choice. I thought I understood the correct wire to use, but then ran across a ...
0 votes
3 answers
1k views

Upgrading panel and subpanel to have a Tesla Wall Connector charger (48amps)

I have NEMA 14-50 in my garage, and would like to install Tesla Wall Connector (TWC) using the same line. This is an upgrade in load for this line, as TWC can draw up to 48 amps and requires a 60 amp ...
1 vote
3 answers
354 views

How to setup the ability to have an EV Charger in two locations for personal and guest use?

I recently saw this load-sharing product - NeoCharge that automatically shares power between something like a dryer and an EV on one outlet on one circuit. It’s really great how load management seems ...
0 votes
3 answers
721 views

Is there a way to put a 60 amp 240 v double phase - receptacle outdoor for future car charger installation?

I live in Ontario and follow the CEC and guidelines. I did take out a permit and doing all the electrical wiring my self. I am wondering how I can put a 60 amp receptacle outside. I can find plenty of ...
4 votes
3 answers
2k views

Best way to ground equipment in a plastic box from metal conduit

My garage has an existing NEMA 14-50 outlet connected to the breaker box via EMT conduit. The conduit only has 2 hot wires and 1 neutral (all #6 THHN), with ground being provided to the metal box via ...
2 votes
2 answers
1k views

Putting in wiring for a Tesla Wall Connector

I have an existing 220v x 30a ckt with 10awg copper for a large A/C outlet that is no longer used. I plan to re-route to a j-box and continue this ckt to the garage via conduit with 6awg (< 50'). ...
6 votes
3 answers
8k views

Can I install two 60 amp EV chargers on a 100 amp subpanel?

I have 200amp service for the house and I'm looking to potentially add capacity for two EV chargers in the garage. I'm hoping to install two EV chargers that can charge up to 48 amps each. I know that ...
7 votes
3 answers
1k views

Can I safely run nm-b below 8' exposed perpendicularly between stud cavities in an unfinished garage?

My Siemens flush mount combo electrical panel is installed to the exterior of my garage. The garage isn't finished (open studs) and eventually I'd like to close it up with drywall (but not for this). ...
4 votes
1 answer
2k views

How to convert receptacle in wall to hard wired box?

As part of some recent (fall 2022) licensed and inspected electrical work I was having done anyway, I also had a NEMA 14-50 receptacle (with code-compliant 50A GFCI breaker in the subpanel) installed ...
2 votes
0 answers
86 views

Which Residential Electric Load multiplier is valid for water heaters and EV charging?

I know how to perform a residential load calculation using either: -(a) the Standard Method, which includes a 0.75 multiplier for fixed appliances (so, a 4500W water heater would be treated as adding ...
0 votes
1 answer
921 views

Can Tesla wall connector be shared with a 60 AMP sub panel that powers most of my house?

I want to get tesla wall connector installed. I got quotes from 2 electricians and they are suggesting different approaches. I would like to understand who is correct. I have a 60 amp sub panel in the ...
3 votes
2 answers
3k views

Can I safely use a NEMA 6-20 EV charger on a NEMA 6-50 outlet?

I have used an EV charger for my car that is "slow" level 1 charging. It's rated for up to 20amps using a NEMA 6-20 plug, however it came with an standard 5-15 adapter (2ft long) that I've ...
3 votes
2 answers
215 views

EVSE Install Questions

I am on the brink of purchasing my first EV, and I have an electrician coming by this weekend to give me a quote for a charger install. Here are the details: 100amp panel Gas furnace, stove, hot ...
1 vote
2 answers
1k views

Upgrade subpanel

I am looking to add a 240v 50amp outlet to my garage for charging the EV. With the help of folks on this forum I found that I need to expand my subpanel to add more breakers before adding a line to ...
2 votes
2 answers
211 views

No power in an unused 240v line

I am a newbie, so please bear with me a little. I have two circuits coming from the electrical panel that are 240v each, into my kitchen. One of those is used by a microwave/oven combo and is working. ...
1 vote
1 answer
2k views

Running EV Charger Wiring through Crawlspace

I'm looking to purchase and install a Tesla home charger since I'm tired of charging on a 120V outlet. I've been reading a bit and think I have a plan, but since this would be my first time doing any ...
0 votes
1 answer
796 views

Design for 40A max continuous EV circuit on sub-panel

I got my hands on a 40A EV "charger" that I'd like to attach to a sub-panel in the garage. (I put "charger" in quotes because the cord with the bump is just a fancy relay; the ...
2 votes
3 answers
2k views

80A vs 60A for garage EV charger

We are planning to put in a new circuit in our garage for an EV charger. The main panel (200A) is on the other side of the exterior of where we would put it, so it’s only maybe ~4 feet of cable needed....