Good day, the 5400zl chassis can take two types of power supply ie. 875watt (J8712A) or the 1500watt (J8713A). The power cords for both the power supplies differ. The reason been that normal PC power cords do not always have the corect thinkness (wire spec) to support the amount a watts and the power cord itself could end up overheating or melting. This is reason why there is a special key at the bottom of the power cord to prevent incorrect power cords been plugged in. The power cord that should ship with the power supply should be the correct one. However if not then you can phone the ProCurve support centre on 800996233 and they will replace it for you.
