The AUX Mains cable length and OUTPUT cable length total must be the same for each system. This adjustment
prevents unbalanced loadsharing by two UPSs in by-pass mode (i.e. AUX Mains cable 1 + OUTPUT cable 1
= AUX Mains cable 2 + OUTPUT cable 2 = AUX MAINS CABLE 3 + OUTPUT CABLE 3).
For equipment with separate AUX Mains, it must be possible to have the neutral of the Aux Mains line in common
electrically with the neutral of the main input feed line. MAX CABLE LENGTH = 6 metres.