Surface Conduit Entry
You can install Express 280 DC fast charging stations at sites where you cannot pour a new concrete pad
or run conductors underground. The Surface Conduit Entry (SCE) kit allows surface drilling and epoxy
installation of anchor bolts, as well as a rear conduit entry box for conductors to enter the station through
surface wireways. The SCE kit supports both Standalone and Paired installations. The SCE kit also supports
adding above-ground conduit to pair an already-installed Standalone station with another Express 280 for
shared DC output.
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).
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The panel breaker serving the charging station matches the site drawing requirements depending on
local code and the type of installation: 80 kW Standalone, 160 kW Paired, 62.5 kW or 50 kW de-
rated (when replacing a previous, lower-amperage system).
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The smooth, level concrete has been approved by a structural engineer for the Express 280
dimensions and weight, OR conforms to these general specifications*:
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At least 305 mm (1 ft) deep (or deep enough to be 305 mm (1 ft) below the frost line)
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At least 1296 mm (4 ft 3 in) on each side
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Contains #4 rebar top and bottom 305 mm (1 ft) on center
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Concrete 2500 PSI minimum
* These pad specifications are applicable in most conditions. In some extreme conditions, a larger pad
would be required.
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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. Visit Connectivity for more information.
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The service clearance of open space (not necessarily at system grade) extends a minimum of
610mm (2 ft) beyond the station in front, and 1072 mm (3 ft 6 in) side to side centered on the
station. See the images below for rear clearance depending on configuration.
12
Clearances
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