The rack must use grounding-type power cords that are compatible with the Oracle Server X6-2L. For example, the Oracle Sun Rack II has grounding-type power cords (three-wire). Always connect the cords to grounded power outlets. Because different grounding methods are used, depending on location, check the grounding type, and refer to documentation, such as local electrical codes. Ensure that the facility administrator or qualified electrical engineer who verifies the grounding method for the building performs the grounding work.