Appendix C. Specifications for non-IBM rack installation
The following instructions provide safety requirements and rack specifications for installing the DCS3700
storage system and DCS3700 storage expansion enclosures into non-IBM racks.
Note: The information in this section applies to 19–inch racks. It is your responsibility, working with
your rack manufacturer, to ensure that the non-IBM rack chosen meets the safety requirements and
specifications listed in this section.
General safety requirements for IBM products installed in a non-IBM
rack or cabinet
The general safety requirements for IBM products installed in non-IBM racks are:
1. Any product or component that plugs into either an IBM power distribution unit or mains power
(via a power cord), or uses any voltage over 42 V ac or 60 V dc (considered to be hazardous voltage)
must be Safety Certified by a Nationally Recognized Test Laboratory (NRTL) for the country in
which it will be installed.
Some of the items that require safety certification may include: the rack or cabinet (if it contains
electrical components integral to the rack or cabinet), fan trays, power distribution unit,
uninterruptible power supplies, multi-outlet strips, or any other products installed in the rack or
cabinet that connect to hazardous voltage.
Examples of OSHA-approved NRTLs for the U.S.:
v UL
v ETL
v CSA (with CSA NRTL or CSA US mark)
Examples of approved NRTLs for Canada:
a. UL (Ulc mark)
b. ETL (ETLc mark)
c. CSA
The European Union requires a CE mark and a Manufacturer's Declaration of Conformity (DOC).
Certified products should have the NRTL logos or marks somewhere on the product or product
label. However, proof of certification must be made available to IBM upon request. Proof consists of
such items as copies of the NRTL license or certificate, a CB Certificate, a Letter of Authorization to
apply the NRTL mark, the first few pages of the NRTL certification report, Listing in an NRTL
publication, or a copy of the UL Yellow Card. Proof should contain the manufacturer's name,
product type and model, standard to which it was certified, the NRTL name or logo, the NRTL file
number or license number, and a list of any Conditions of Acceptance or Deviations. A
Manufacturer's Declaration is not proof of certification by an NRTL.
2. The rack or cabinet must meet all electrical and mechanical safety legal requirements for the country
in which it is installed.
The rack or cabinet must be free of exposed hazards (such as voltages over 60 V dc or 42 V ac,
energy over 240 VA, sharp edges, mechanical pinch points, or hot surfaces).
3. There must be an accessible and unambiguous disconnect device for each product in the rack,
including any power distribution unit.
A disconnect device may consist of either the plug on the power cord (if the power cord is no longer
than 1.8 m (6 ft.)), the appliance inlet receptacle (if the power cord is of a detachable type), or a
power on/off switch, or an Emergency Power Off switch on the rack, provided all power is removed
from the rack or product by the disconnect device.
© Copyright IBM Corp. 2011 147
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