ADS Environmental Services ADS TRITON+ QR 775027 A3 - Manual (Page 173)

External Power 5-23
connection facility represents the specific location on the monitor
top at which the ground wire from the ExPAC terminates.
When using an ExPAC, you first must install two ground terminal
blocks next to the ExPAC and run a short ground wire from the
ExPAC to one of two ground terminal blocks adjacent to the
ExPAC. Then, you must run a ground wire from one of the ground
terminal blocks to the existing earth ground outside the applicable
enclosure and run another ground wire from the other ground
terminal block to the TRITON+ monitor’s ground connection
facility.
The 10-gauge ground wire that runs between a ground terminal
block and the monitor is included in an external power grounding
kit available through ADS (p/n 8000-0434-xxx). This kit is
required for all external power applications. For the ground wire
that runs between a ground terminal block and the existing earth
ground, ADS recommends using at least a 12-gauge ground wire.
For applications that do not include the XIO or XBUS, you must
acquire two ground terminal blocks that can accommodate 18- to
10-gauge wires and obtain an 18-gauge ground wire to run from the
ExPAC to a ground terminal block.
Install the ground wiring in the following way:
1. (applies only to applications without an XIO or XBUS)
Perform the following steps to prepare the ExPAC before
running the two primary ground wires:
 Mount two ground terminal blocks on the existing DIN rail
or other suitable structure to the right of the ExPAC.
Remember, you must use terminal blocks that can
accommodate 18- to 10-gauge ground wire.
Note: If you are not mounting the ground terminal blocks
to a metal DIN rail, make sure they are mounted to a
structure or intersect in such a way that ensures that all the
ground wires attached to both terminal blocks share a
common electrical connection.