currentzx1 is a read-only integer (0 to 2000) reporting the ZX line current on branch 1 of the Unity PDU, expressed in hundredths of an amp. This lets an admin see the actual electrical load carried by the ZX leg of branch 1 independently of the PDU's other phase pairs, which is essential for spotting an unbalanced load before it trips a breaker. For example, if currentzx1 reads 1450 (14.50 A) while the PDU's other legs sit near 800, an admin would recognize branch 1's ZX leg is carrying a disproportionate share of the connected equipment and consider redistributing outlets.