Where long cable runs are necessary (e.g. over 20m), labels should be fixed along the d.c. cables.
Labeling fixed every 5 to 10m is considered sufficient to identify the cable on straight runs where a clear view is possible between labels.
Where multiple PV sub-arrays and/or string conductors enter a junction box they should be grouped or identified in pairs so that positive and negative conductors of the same circuit may easily be clearly distinguished from other pairs.
90 W x 30 H mm