What the 1000 A rating means for your switchboard
The Schneider Electric ENW22318 is a drawout chassis from the EasyPact NW range, rated 1000 A at 40 °C across 4 poles with an H breaking capacity code. That 1000 A continuous current rating governs the main bus or feeder it can protect — sized for a 1000 A incomer or a large downstream distribution panel. The H code indicates a high breaking capacity suitable for installations with high prospective fault current, typically above 50 kA at 415 V, though the exact value depends on the specific breaker inserted into this chassis.