IBM System x3650 M4 Type 7915 Problem Determination And Service Manual page 281

conductor of the same dc supply circuit and the earthing conductor, and also the
point of earthing of the dc system. The dc system shall not be earthed
elsewhere.
v The dc supply source shall be located within the same premises as this
equipment.
v Switching or disconnecting devices shall not be in the earthed circuit conductor
between the dc source and the point of connection of the earthing electrode
conductor.
Statement 31:
Chapter 5. Removing and replacing server components
263