Xantrex Technology XTR 850 Watt - Manual (Page 40)

Installation
2-10 975-0200-01-01
Maximum Load Wiring Length For Operation With Sense Lines
Noise and Impedance Effects
To minimize noise pickup or radiation, use shielded twisted pair wiring of
the shortest possible length for load sense wires. Connect the shield to the
power supply chassis. Where shielding is impossible or impractical,
simply twisting the wires together will offer some noise immunity.
Figure 2-2 Maximum Load Wire Length for 1 V Line Drop