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of 24 A (30 A x 80 %). Therefore, the sum of all equipment that is 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).

• 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).

• 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

onsite.

• 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 that are required for the country in which the product

is installed).

• If the rack or cabinet or any products that are installed in the cabinet had safety or weight labels that

are applied by the manufacturer, they must be intact and translated into the languages that are required

for the country in which the product is installed.

• 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.

• 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 that are 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 or ladders. If a ladder or ladders are required for service, the customer must supply the

OSHA- and CSA- approved nonconductive step ladder (unless other arrangements are made with the

local IBM Service Branch Office). Some products can have rack installation limitations. Refer to the

specific server or product specifications for any restrictions. Products that are 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 are

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 that is required for safe servicing of any of the

products that are installed in the racks. Contact your Installation Planning Representative if you are in

doubt.

Related reference
Rack specifications