Are permits required to install an EV
Depending on specific state electrical codes, a permit is required to be filed by both the
electrician and home owner for an electric vehicle charger to be installed, just like any major appliance.
An initial and final inspection of all instillations is to be done by a local wiring inspector within
compliance of the state regulations.
What are the regulations concerning EV chargers?
There are three different levels of regulated charging for electric vehicle chargers that was
implemented by the Electric Power Research Institute which account for the different levels of energy obtained
by the charging unit. Level 1 describes the direct connection requirements to a 120 volt outlet with a
ground-fault circuit interrupter in which a maximum continuous current can run at 12, 16 or 24 amps. Level 2
describes a charger which is directly connected into the power grid, where a 240 volt connection with a maximum
continuous current of 32 amps. It requires not only grounding, but a ground fault protection for the individual
who is charging and a no-load make or break interlock which requires the electric vehicle to be turned off
during charging. The final charging type, level 3, is still in development stages due to their high power
requirements and high current capacities, but are a quick-charger which uses a 480 volt 3 phase AC input with a
maximum continuous current of 400 amps. Since most residential transformers cannot handle this high of a
voltage drop, there are no specific regulations pertaining to this charging unit.