IBM BladeCenter HT 8740 Problem Determination And Service Manual page 26

connecting the safety ground wire. Each terminal has a terminal cover. Remove the
terminal cover before connecting cables to each terminal and reinstall the terminal
cover on each terminal before supplying power to the BladeCenter HT unit. For
more information on removing and installing a terminal cover, see "Removing a dc
terminal cover" on page 86 and "Installing a dc terminal cover" on page 88 for more
information.
There are two types of terminal covers, depending on date of manufacture. The
following illustrations show both types of terminal boxes for the two types of
terminal covers.
When connecting a wire to each stud, install a flat washer (optional) on the stud,
install the wire, install a flat washer (optional), install a split washer and then install
the nut.
The following guidelines are provided for connecting a 60 A BladeCenter HT unit to
a -48 V dc power source:
v The power source must have a minimum of 80 A overcurrent protection. See
8
BladeCenter HT Type 8740 and 8750: Problem Determination and Service Guide
article 240, paragraph 3, table 310-16 of the National Electric Code for more
information about electrical wiring requirements.