Why did my EV charger fail inspection?

This is a pre-check, not a diagnosis. Walk it before the inspector is scheduled, because a rejection costs a re-inspection fee, a delay of days to a couple of weeks for the next slot, and sometimes the removal of work you have already finished.One thing you will not find here is a percentage. We do not publish rejection rates for residential EV circuits, because there is no reliable national dataset on them and inventing one would be worse than saying so. These are categories that recur in the field, ordered by how often they turn up in conversation rather than by any count.You will also not find a jurisdiction-specific answer, because there isn't one. Jurisdictions adopt editions of the National Electrical Code on their own schedule, and plenty are several cycles behind the current one. An installer working from the newest edition in a jurisdiction that adopted an older one will occasionally be asked to change work that was correct by the newer rule. Ask which edition applies before the work starts.

If the charger plugs into a receptacle rather than being hardwired, that receptacle needs ground-fault protection. NEC 625.54 requires GFCI protection for personnel on receptacles installed for the connection of electric vehicle charging within its stated voltage and current limits, and recent code cycles have widened the general garage and outdoor receptacle rules in the same direction.This is the one that catches people who thought a receptacle was the simple option. It is also the one where the fix is cheap if you catch it before the wall closes and irritating if you do not.A related trap worth knowing: a plug-in charger on a 50-amp receptacle is limited to 40 amps of continuous draw. If somebody installed a 48-amp unit on a receptacle, the inspection failure is the least of the problems, because 48-amp units are hardwired for exactly this reason.

The failure is rarely that somebody used absurdly thin wire. It is that they sized the conductor from the breaker and stopped there, without checking which temperature column applies at the terminals.NEC 110.14(C) ties conductor ampacity to the temperature rating of the terminations, and for circuits of 100 amperes or less that default is the 60 °C column unless the equipment is listed and identified for a higher rating. Most modern breakers and charger terminals are marked 75 °C, which buys you a size — but marked is the operative word. Nobody gets to assume it.There is a second trap in the wiring method. NM cable, the flat cable most residential branch circuits use, is limited to the 60 °C column by NEC 334.80 no matter what its conductor insulation is rated for. So a run in NM and the same run in conduit can call for different conductor sizes on an identical circuit.The table below is the check an inspector runs. It is not a design: no ambient temperature correction or conduit fill adjustment is applied, and aluminium conductors are a different table entirely.

Outdoor runs collect four related rejections, and all of them are visible from ten feet away, which is why they get written up.Support spacing is the most common: conduit strapped too far apart, or drooping between supports, or hanging off a fitting rather than off the structure. Each raceway type has its own maximum support interval and the inspector knows them.Then fittings. Boxes, connectors and covers in a wet location have to be listed for it, and a fitting that is fine inside a garage is not automatically fine on the outside of the same wall. Receptacles in outdoor wet locations need a cover that is weatherproof while in use, per NEC 406.9.Then penetrations. Where the conduit enters the building the hole has to be sealed. An unsealed penetration is a water path into a wall cavity and it will be flagged.Then the equipment itself. NEC 110.3(B) requires listed equipment to be installed per its listing, and a unit whose nameplate does not cover outdoor use does not become outdoor-rated by being mounted outdoors.

NEC 625.43 requires a disconnecting means for EV supply equipment rated more than 60 amperes or more than 150 volts to ground, installed in a readily accessible location. A typical residential 240-volt circuit is 120 volts to ground, and a 48-amp charger is under 60 amperes, so the base code does not require a disconnect for most home installs.That is not the end of it, because jurisdictions amend. Some require a disconnect on any EVSE circuit, some require it where the charger is out of sight of the panel, and some require it outdoors. These amendments are local, they are real, and they are the reason two identical installs twenty miles apart get different answers.Ask the permit office before the work, not the internet. A disconnect added at rough-in is a small part; a disconnect added after a rejection is a return visit and a re-inspection fee.

NEC 110.26 requires clear working space in front of the panel: 30 inches of width, 36 inches of depth measured from the live parts, and adequate headroom. It has to be clear, not clearable. Nothing gets stored in it and nothing gets mounted in it.Garages are where this gets violated, because a garage panel is surrounded by everything a garage contains. Mounting the charger directly in front of the panel, or on the wall inside the 30-inch width, is a rejection. So is a shelf, a bike hook or a chest freezer, and inspectors do write those up.This is worth checking at the mounting-position stage rather than after the bracket is screwed to the block. It is also a good argument for mounting the charger where the car is rather than where the panel is.

Breakers have to be listed for the panelboard they are installed in. Physically fitting is not the same thing, and a cheaper substitute brand that fits the bus is one of the more serious quiet failures in residential work.NEC 110.3(B) covers it: listed equipment is installed and used per its listing, and the panel's listing names which breakers may go in it. The panel label is usually printed on the inside of the door.This is also where obsolete panels end the conversation. Certain older panel types have known problems and no electrician will add a 60-amp continuous load to one. If your quote includes a panel replacement and you were not expecting it, this is often the reason — and it is a reason worth accepting.

Some rejections have nothing to do with the wire. The wall was closed before a required rough inspection, so nobody can see what is behind it. The permit describes a 40-amp charger and a 48-amp one got installed. The trench was backfilled before the depth was inspected. The panel schedule was never updated, so the new circuit is not labelled.For a power-sharing pair on a single circuit, bring the manufacturer's listing documentation to the inspection. An inspector who has not seen a shared installation before is entitled to ask how a 60-amp circuit is legally serving two chargers, and the answer is in the equipment listing and in the energy management provisions the code recognises. Have the paperwork on site.None of these is a defect. All of them cost a re-inspection.

Get the correction notice in writing with the code section cited. A verbal 'that's not right' is not something you can act on or dispute, and inspectors expect to be asked for the section.If a licensed contractor did the work, the correction is theirs and the re-inspection fee normally is too — assuming the permit is in their name. If the permit is in your name, that is the moment the trade you made becomes visible. It is covered in the permit article in this cluster.If you genuinely believe the inspector is applying a rule from a different code edition, ask which edition the jurisdiction has adopted and which section applies. That is a reasonable question asked politely and it occasionally resolves the whole thing. It is not a fight worth having if you are wrong.Then close the permit and keep the record. A passed final inspection is the document that makes every future conversation about this circuit short.