and guidance for planning, designing and construction of electrical power and
illumination systems for Military Medical and Dental Treatment Facilities
(MTF's). The words "WILL" and "SHALL" identify mandatory policy and
requirements, where the words "Should" or "May" identify guidance. In
countries other than the United States, when host nation treaties, codes,
standards, or special local conditions conflict with the criteria in this
chapter, resolution shall be achieved in accordance with paragraph 1.2 of this
SCOPE. The latest version of the general electrical and
illuminating criteria and standards are referenced at "Applicable References,
TABLE 10.1." Special DOD electrical criteria, standards and policy for medical
facilities are covered in this chapter. Where criteria and standards for
general and specific conditions and problems are not covered, acceptable
industrial standards shall be followed.
POWER SUPPLY CRITERIA FACTORS. Military facilities are generally
classified as mission essential or mission support. The designer will
verify with the Design Agent the facility classification and design
requirements to achieve the necessary degree of reliability, durability,
facilities delineated in MIL-HDBK-1190 before commencing design.
RELIABILITY. Mission classification and requirements
used to establish the design reliability requirements. An alternative
comparison assessment will be developed to evaluate the reliability choices.
Alternative power systems may be authorized, but are limited to serving
certain essential loads for mission critical, hospital, and other special
facilities and loads as identified therein. The designer shall consider the
location and space for essential electrical system components in order to
limit interruptions caused by localized natural conditions, such as floods
and earthquakes. Essential systems will be designed to function after seismic
events occur. Non-essential systems may be inoperable, but components will be
constrained to avoid personnel injury, or damage to other building components.
DURABILITY. Installed electrical systems and electrical
equipment will have a minimum rating for continuous full design load, except
where other criteria mandate greater, to meet the reliability requirements for
the design life of the facility. MIL-HDBK-1190, paragraph "Construction Level
and Building Types," identifies the design life for facilities.
will provide a means to remove and maintain equipment, and field installed
wiring without interruption to mission critical loads.
EFFICIENCY. The efficiency of the facility electrical
system, measured at the utilization transformer secondary and the alternative
power source, will have a power factor (PF) not less than 0.90 at nominal
voltage for balanced three phase loading (phase unbalance will not exceed 5
percent between A, B, and C phase). Where required power factor correction
shall be used to assure a minimum PF of 0.90.
ECONOMY. Evaluate alternative system configurations, and
component types and sizing for economic value, consistent with other criteria
factors above, and as noted in MIL-HDBK-1190.
10.1.1.3 Criteria For Designs in the Federal Republic of Germany(FRG). The
electrical design shall be in accordance with DIN VDE Standards 0100, 0298,