IBM 8202-E4B Manual page 93

The total load connected to the power distribution unit must be less than the rating of the power
distribution unit. For example, a power distribution unit with a 30 A connection will be rated for a
total load of 24 A (30 A x 80 %). Therefore, the sum of all equipment connected to the power
distribution unit in this example must be lower than the 24 A rating.
If an uninterruptible power supply is installed, it must meet all the electrical safety requirements as
described for a power distribution unit (including certification by an NRTL).
v The rack or cabinet, power distribution unit, uninterruptible power supply, multi-outlet strips and all
products in the rack or cabinet must be installed according to the manufacturer's instructions, and in
accordance with all national, state or province, and local codes and laws.
The rack or cabinet, power distribution unit, uninterruptible power supply, multi-outlet strips and all
products in the rack or cabinet must be used as intended by the manufacturer (per manufacturer's
product documentation and marketing literature).
v All documentation for use and installation of the rack or cabinet, power distribution unit,
uninterruptible power supply, and all products in the rack or cabinet, including safety information,
must be available on-site.
v If there is more than one source of power in the rack cabinet, there must be clearly visible safety labels
for Multiple Power Source (in the languages required for the country in which the product is
installed).
v If the rack or cabinet or any products installed in the cabinet had safety or weight labels applied by the
manufacturer, they must be intact and translated into the languages required for the country in which
the product is installed.
v If the rack or cabinet has doors, the rack becomes a fire enclosure by definition and must meet the
applicable flammability ratings (V-0 or better). Totally metal enclosures at least 1 mm (0.04 in.) thick are
considered to comply.
Nonenclosure (decorative) materials must have a flammability rating of V-1 or better. If glass is used
(such as in rack doors) it must be safety glass. If wood shelves are used in the rack/cabinet, they must
be treated with a UL Listed flame-retardant coating.
v The rack or cabinet configuration must comply with all IBM requirements for "safe to service" (contact
your IBM Installation Planning Representative for assistance in determining if the environment is safe).
There must be no unique maintenance procedures or tools required for service.
Elevated service installations, where the products to be serviced are installed between 1.5 m and 3.7 m
(5 ft and 12 ft) above the floor, require the availability of an OSHA- and CSA-approved nonconductive
step ladder. If a ladder is required for service, the customer must supply the OSHA- and CSA-
approved nonconductive step ladder (unless other arrangements have been made with the local IBM
Service Branch Office). Products installed over 2.9 m (9 ft) above the floor require a Special Bid to be
completed before they can be serviced by IBM service personnel.
For products not intended for rack-mounting to be serviced by IBM, the products and parts that will
be replaced as part of that service must not weigh over 11.4 kg (25 lb) Contact your Installation
Planning Representative if in doubt.
There must not be any special education or training required for safe servicing of any of the products
installed in the racks. Contact your Installation Planning Representative if you are in doubt.
Related reference:
"Rack specifications" on page 33
Rack specifications provide detailed information for your rack, including dimensions, electrical, power,
temperature, environment, and service clearances.
Hardware specification sheets
79