Site Readiness Planning
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Revision A
Data Center Safety
Safety must be a primary consideration in planning installation of VSM5 system equip-
ment, and is reflected in such choices as where equipment will be located, the rating and
capability of electrical, HVAC, and fire-prevention systems that support the operating envi-
ronment, and the level of personnel training. Requirements of local authorities and insur-
ance carriers will drive decisions as to what constitutes appropriate safety levels in a given
environment.
Occupancy levels, property values, business interruption potential, and fire-protection sys-
tem operating and maintenance costs should also be evaluated. The Standard for the
Protection of Electronic Computer / Data Processing Equipment (NFPA 75), the Na-
tional Electrical Code (NFPA 70), and local and national codes and regulations can be
referenced to address these issues.
Emergency Power Control
The data center should be equipped with readily-accessible emergency power- off switch-
es to allow immediate disconnection of electrical power from VSM5 system equipment.
One switch should be installed near each principal exit door so the power-off system can
be quickly activated in an emergency. Consult local and national codes to determine re-
quirements for power disconnection systems.
Fire Prevention
The following fire-prevention guidelines should be considered in the construction, mainte-
nance, and use of a data center:
• Store gases and other explosives away from the data center environment.
• Ensure data center walls, floors, and ceilings are fireproof and waterproof.
• Install smoke alarms and fire suppression systems as required by local or national
codes, and perform all scheduled maintenance on the systems.
Note: Halon 1301 is the extinguishing agent most commonly used for data center fire
suppression systems. The agent is stored as a liquid and is discharged as a
colorless, odorless, electrically nonconductive vapor. It can be safely dis-
charged in occupied areas without harm to personnel. Additionally, it leaves no
residue, and has not been found to cause damage to computer storage media.
• Install only shatterproof windows, in code-compliant walls and doors.
• Install carbon dioxide fire extinguishers for electrical fires and pressurized water extin-
guishers for ordinary combustible materials.
• Provide flame-suppressant trash containers, and train personnel to discard combustible
waste only into approved containers.
• Observe good housekeeping practices to prevent potential fire hazards.
