HP 354556-002 - Manual (Page 55)

Cabling and powering up the system 55
CAUTION: Always use blanks to fill empty spaces in
enclosures. This arrangement ensures proper airflow. Using an
enclosure without the proper blanks results in improper cooling that can
lead to thermal damage.
Redundant mini bus bar configuration example
The configurations illustrated in this document are non-redundant AC mini bus
bar configurations. To obtain AC redundancy, you need the AC redundant mini
bus bar box. Refer to the documentation supplied with the AC redundant mini
bus bar box and to the HP ProLiant BL System Best Practices Guide.