Check Site Readiness

Before beginning work, check that the site meets the basic requirements outlined below, as illustrated in the following image. Measurements are listed in mm (in).

  • The panel breaker serving the charging station matches the site drawing requirements depending on local code and the type of installation: 62.5 kW Standalone, 125 kW Paired, or 50 kW de-rated (when replacing a previous, lower-amperage system).

  • The smooth, level concrete has been approved by a structural engineer for the Express 250 dimensions and weight, OR conforms to these general specifications*:

    • At least 305 mm (12 in) deep (or deep enough to be 305 mm (12 in) below the frost line)

    • At least 1296 mm (51 in) on each side

    • Contains #4 rebar top and bottom 305 mm (12 in) on center

    • Concrete 2500 PSI minimum

    • * These pad specifications are applicable in most conditions, as described in the Express 250 Site Design Guide. In some extreme conditions, a larger pad would be required.

  • Charging station sites are positioned so that each station is centered on a parking space (unless curbside), with the front of the station facing the vehicle. (This maximizes cable reach.)

  • The cellular signal strength at the station location has been tested and is consistently strong. If RSRQ is measured at -10 dB or better, then RSRP can be -90 dBm or better. If RSRQ cannot be measured or is not adequate, RSRP must be -85 dBm or better.

  • The service clearance of open space (not necessarily at system grade) extends a minimum of 610 mm (24 in) beyond the station in front, 2156 mm (84.8 in) side to side centered on the station, and 305 mm (12 in) above the station (image callout a, below). See the images below for rear clearance depending on configuration.

  • The front of the station has 352 mm (14 in) of space at grade from the front right anchor, extending 1700 mm (67 in) to the left, without any permanent obstructions (bollards, wheel stops, etc.) (image callout b).

If the conduit runs from the back of the SCEClosed Surface Conduit Entry to the side(s), with rigid wireway elbows:

  • The rear conduit clearance at grade is 700 mm (27.6 in)

  • The recommended extra rear service clearance of open space (not necessarily at grade) is 300 mm (12 in) for servicing the conduit, for a total of 1005 mm (39.6 in) from the front anchor

If the conduit runs from the back of the SCEClosed Surface Conduit Entry straight back:

  • The rear conduit clearance at grade is 550 mm (21.7 in)

  • The recommended extra rear service clearance of open space (not necessarily at grade) is 300 mm (12 in) for servicing the conduit, for a total of 855 mm (33.7 in) from the front anchor

If the site does not meet these basic requirements, contact ChargePoint before continuing.

Check the SCE Kit Contents

Check the contents of the SCEClosed Surface Conduit Entry Kit before beginning work. The SCEClosed Surface Conduit Entry Kit might arrive in multiple boxes. The full kit includes:

    1. Surface mount plate

    2. Box base

    3. Box cover

    4. Left and right side extrusions with SCEClosed Surface Conduit Entry cutouts (x2)

    5. Fastners:

      • Box base screws (x8)

      • M16 x 300 Hilti anchor bolts, 304.8 mm (12 in) long (x4)

      • M16x13x2 hex nuts (x8)

      • 5/8 in ASTM F436 washers (x8)

Prepare the Express 250

Determine whether you are installing a new Express 250 station to be completely surface mounted, or you are adding above-ground conduit to pair a Standalone station with another Express 250 for shared DC output.

If you are installing a NEW station:

  1. Receive the Express 250 station and its Power Modules at the site.

  2. Follow the directions in section 1 of the Express 250 Installation Guide to familiarize yourself with the process, crate contents, and required tools and materials.

  3. Begin installation with the next section, "Install Surface Mount Anchor Bolts".

If you are UPDATING a station:

  1. Receive the Express 250 Pairing Kit at the site.

  2. Power off the station and remove all cover panels.

    3. Earlier stations had grounding straps on the Power Modules and their holders. If you are pairing an existing station, you must replace these with the EMIClosed Electromagnetic Interference shields included in your Pairing Kit. The straps are not sufficient for paired stations.

  3. Begin work in this guide with the section Install the SCEClosed Surface Conduit Entry Box Base and Box Cover.