What the ratings mean for panel wiring duty
The 387700124: The 15 A per-circuit rating suits power distribution bus bars and branch circuits in industrial control panels — it works with the 14-22 AWG gauge range the block accepts. The 300 V rating covers standard AC panel bus; confirm the peak working voltage against your system bus before committing. The 2-wall dual-barrier construction adds mechanical isolation between adjacent circuits compared to a single-wall strip — useful in panel environments where vibration or thermal cycling can work a wire loose over time. The zinc clear-chromate terminal screws with steel construction provide repeat torque retention without galling on the screw head during field servicing. The flange mounting feature anchors the strip to the chassis face — it keeps the block from rotating under repeated screw engagement on the wire entries, which matters in production builds where the same connector gets torqued dozens of times during wiring and rework cycles.