In Step 10: Complete Site Assessment and Design EVSE, the key fleet electrification stakeholder at the site location completed a siting analysis to help choose the charging station locations, guide site designs, and evaluate power requirements. The site installation team or contractor's first step in installing EVSE is to update and finalize the draft site plan or drawing. This final draft site plan should include details and diagrams of any excavation work that the site or contractor will do (i.e., trenching, concrete pouring) and how this work may affect operations at the facility.

In Step 9: Coordinate with Local Utility Service and Step 10: Complete Site Assessment and Design EVSE, the key fleet electrification stakeholders have contacted the local electric utility representative and made a preliminary determination of whether the utility supply and equipment will be adequate to support the new EVSE based on the initial EVSE siting analysis. If the EVSE will draw power from the grid, the final draft plan should include the final determination of any electrical upgrades the utility will need to make (in coordination with the local utility), such as upgraded distribution and transmission electric lines, upgraded service, or new meters. The facility infrastructure manager and energy managers, as well as environmental and safety staff, should actively participate in the creation of the final draft site plan. 

After developing the site plan, the site or contractor should file an electrical work permit with the electrical authority having jurisdiction (AHJ). The permit is only required if the EVSE will draw power from the electric grid. The site or contractor must have permitted approval before conducting any electrical upgrades or installations. The AHJ is responsible for inspecting and approving all upgrades. When preparing permitting materials, the site or contractor should check to be sure which AHJ has responsibility for the facility, as requirements vary between jurisdictions. The site or contractor should also work closely with the AHJ to understand any inspections or processes that may be required.

The utility, working in conjunction with the AHJ, site, and contractor (if used), should make sure the electrical power supply can meet the increased demand from the EVSE. This is only required if the EVSE will draw power from the electric grid. It can take several months for the utility to determine whether new electrical service is required and then make the necessary upgrades. Therefore, it is important to contact the utility early in the process. Utility contact information and incentive programs can be found in the EV Utility Finder tool.

After the utility has upgraded the power supply, the site or contractor should install the EVSE. The first step is to complete any excavation necessary to run electrical conduit. Before excavating, the site or contractor should work with facilities personnel and call "Before you dig" services to mark any underground electrical, gas, water, sewage lines, or other underground objects (rebar, underground storage tanks). Then, the site or contractor should install any needed electrical upgrades, such as transformers, service panels, and meters. Next, the site or contractor should run conduit from the power supply to the EVSE installation site. Conduit protects the wires from the elements. Charging stations rated more than 60 amperes require a separate disconnect under the National Electrical Code (NEC 625.23), which should be installed while running conduit. Once the conduit has been installed and inspected, the site or contractor should pull wires through the conduit. Level 2 chargers require two hot lines, a neutral and a ground.

Overcurrent protection (e.g., circuit breakers) should be sized to support 125 percent of the EVSE's rated load (NEC 625.21). Next, the site or contractor should mount and install the charger. This may require upgrading the mounting surface (i.e. pouring a new concrete pad). The site or contractor should also make other site upgrades if necessary, such as protective bollards, improved lighting, and signage.

Once installation is complete, an independent inspector should verify that the EVSE meets all electric codes, as well as facility environmental and safety requirements. The inspector should check all installed equipment, including the EVSE, electrical panels, wiring, charger mounting, signage, and connections.

The site or contractor is responsible for resolving any issues identified by the inspector.

After the independent inspector has approved the installation, the site location fleet manager, facility infrastructure manager, and other key fleet electrification stakeholders should verify the completion and operation of the installed EVSE.