IBM BladeCenter HT 8740, Problem Determination And Service Manual

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For NEBS compliance, the protective earthing conductor must use copper
conductors with a size minimum of 6 AWG (circular mil area of 20800–33100)
and must be terminated in a UL recognized two hole lug sized for a M6 stud.
Chassis ground studs are on 5/8-inch centers. An example of this type of two
hole lug is the Thomas and Betts part number 54205 using the Thomas and
Betts crimping tool model TBM-25S.
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Torque the wiring-terminal nuts to 1.5 newton-meters (13.3 inch-pounds)
For more information, see Statement 34 in “Safety” on page vii.
Connecting the BladeCenter HT type 8750 to ac-power
The BladeCenter HT unit has four ac-power C20 input connectors. Two C20/C19
type ac jumper cords are supplied with the BladeCenter HT unit. To supply power to
the BladeCenter HT unit, connect one end of each power cord to a power
connector on the rear of the BladeCenter HT unit and the other end of each power
cord to a 200-240 volt 20 amp power distribution unit or appropriate electrical outlet.
An external Surge Protective Device (SPD) is not required at the ac-power input of
the BladeCenter HT unit.
The blade servers in the BladeCenter HT unit are connected to power but are not
turned on. After the BladeCenter HT unit has power, depending on the configuration
settings, the blade servers might have to be individually turned on.
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BladeCenter HT Type 8740 and 8750: Problem Determination and Service Guide