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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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7 answers
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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 ...
Nicholas's user avatar
  • 919
10 votes
2 answers
714 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 ...
cyclops's user avatar
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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 ...
holmeski's user avatar
  • 195
8 votes
3 answers
2k views

1AWG with a smaller breaker?

I am thinking about having an electric vehicle supply equipment (EVSE) installed. In the interest of future proofing for an electric pickup truck coming on the market about a year from now, i would ...
Nathan R's user avatar
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). ...
alan's user avatar
  • 73
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 ...
user163047's user avatar
7 votes
1 answer
988 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 ...
Matt's user avatar
  • 193
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 ...
will74's user avatar
  • 117
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 ...
KM001's user avatar
  • 61
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,...
WillyWonka's user avatar
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 ...
bigchief's user avatar
  • 761
5 votes
1 answer
912 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 ...
RustyShackleford's user avatar
4 votes
4 answers
1k views

I want to install generic capability for future car charging. What 240v outlet on the outside of the house is acceptable?

I am wiring an old house with new wires and want to have an outlet outside for charging a potential electric car. There is no carport or roof overhang, so weather resistance is important. The wall is ...
Steve Foutz's user avatar
4 votes
3 answers
409 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 ...
RustyShackleford's user avatar
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 ...
peter's user avatar
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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 ...
Jacob Krall's user avatar
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 ...
Chris_engagingdata's user avatar
3 votes
2 answers
2k 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 ...
BHJO's user avatar
  • 31
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 ...
john s's user avatar
  • 129
3 votes
1 answer
1k views

Wiring for EV chargers in detached garage

I'm remodeling my detached 3-car garage, so decided to have some 240VAC circuits installed for EV charging and possibly running 240VAC tools should the need arise. I don't actually have immediate ...
RobH's user avatar
  • 31
3 votes
1 answer
109 views

EVPS conduit recommendation

I’m installing a 240v 60a branch for a hardwired ChargePoint Home Flex, set to a 48a load. I’m planning to use 6-3 THHN, with 8g ground in conduit. I’m looking for recommendations on the correct type ...
oadesign's user avatar
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....
shaddow's user avatar
  • 213
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 ...
RobbyV's user avatar
  • 31
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 ...
amgdart's user avatar
  • 61
2 votes
2 answers
1k views

Switch for alternating between outlets

I'm installing a Tesla charger, but I also want to install a NEMA 14-50 outlet so other EV owners can charge in that spot as well, but as it's one spot, both won't be used at the same time. I don't ...
directedition's user avatar
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'). ...
Ron C's user avatar
  • 79
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 ...
Alex Hill's user avatar
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....
levineds's user avatar
  • 183
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. ...
adadevil's user avatar
2 votes
2 answers
2k views

Grounding requirements for multipanel, multiservice installation

Overview: My question ultimately boils down to figuring out how many wires I can properly stuff down an existing conduit. There are many questions pertaining to wiring and grounding sub-panels, but I'...
whatsisname's user avatar
  • 2,425
2 votes
3 answers
8k views

Adding new 240v 30 amp outlet by tapping into existing NEMA 10-30 outlet box

Here's the situation: House was built in the 1980s. My laundry room has an existing NEMA 10-30 outlet that is not being used since we have a gas dryer. I am thinking about getting an electric car so I'...
Vaughan's user avatar
  • 23
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://...
solar2023's user avatar
2 votes
1 answer
574 views

Can I charge my Electric Car from two 120v home circuits?

I'm in the USA. I'm wanting to use two different 120v 15A plugs that are on different circuits at the same time to charge my car. I'm thinking of creating a hub adaptor that is the inverse of what is ...
Gabriel Fair's user avatar
2 votes
1 answer
802 views

Sub-panel tapped from aluminum feed in Duplex

I live in a Duplex (build in 1979) with a 200A distribution panel which has 2 meters and 2 100A breakers (one for each unit).The distribution panel is on the outside of the garage and is fed ...
Christian K's user avatar
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 ...
borisj's user avatar
  • 147
1 vote
2 answers
2k views

Penetrating exterior wall to bring in a continuous MC cable to the garage

I'm installing a high current 100 amp EV charger inside my garage. It seems easiest to wire it with a continuous run of 2/3 MC cable from the outdoor breaker panel, first strapped to the exterior ...
T Davis's user avatar
  • 11
1 vote
3 answers
351 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 ...
will74's user avatar
  • 117
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 ...
stan li's user avatar
  • 11
1 vote
3 answers
483 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 ...
Matt Johnson-Pint's user avatar
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 ...
adadevil's user avatar
1 vote
5 answers
4k views

Is a 240vac (2 pole) outlet a "single phase receptacle"?

I just read about NEC 2017, section 625.54: "Ground-fault circuit-interrupter protection for personnel. All single-phase receptacle installed for the connection of electric vehicle charging that are ...
Rodo's user avatar
  • 543
1 vote
1 answer
136 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,...
RustyShackleford's user avatar
1 vote
1 answer
232 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 ...
Dmoles's user avatar
  • 13
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 ...
Aaron J's user avatar
  • 13
1 vote
1 answer
593 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 ...
luk's user avatar
  • 93
1 vote
1 answer
629 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 ...
highbandwidth's user avatar
1 vote
2 answers
287 views

Metering a 240V 40A circuit with an Efergy Engage meter

I have a single-phase, 240V, 40A circuit (on a 50A breaker) connected to a NEMA 14-50 plug (these are words my electrician used when I asked him). I use this to charge my electric car. My HOA has ...
medley56's user avatar
  • 113
1 vote
1 answer
47 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 ...
Novice's user avatar
  • 31
1 vote
1 answer
2k views

Can my panel support a 60A circuit for EV charging?

I’m awaiting an EV I ordered, and in order to prepare for it, need to install a 240V outlet in my garage. The circuit would be for a 'Ford Connected Charge Station': 60A breaker (240V, 2 pole, 60 Hz) ...
oadesign's user avatar
1 vote
1 answer
2k views

Wiring for EV charger in garage

I currently have a 240 40 amp charging unit in my garage for my electric car. I believe the wire is 4 gauge; the charging unit plugs in rather then being directly hard wired. The unit is on a 50 amp ...
patrick's user avatar
  • 11