WattMaster WCC II - Manual (Page 243)

Section 5: Installation Guide
WCC II Operator’s Guide
Operator Interfaces 5-41
SAT II-B to TUC-VR Wiring
Use low capacitance, 18 gauge, twisted pair non-shielded
wire for lengths up to 4000 feet from the SAT II-B to the
farthest TUC-VR.
The “GND” terminal on the TUC-VR must be connected
to a local chassis ground.
CAUTION: DO NOT RUN A COMMON GROUND
FROM TUC-VR TO TUC-VR. THIS WILL DESTROY
COMPONENTS WITHIN THE TUC-VR.
1.
2.