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USACE / NAVFAC / AFCESA
UFGS-16410A (December 2004)
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Preparing Activity: USACE
Superseding
UFGS-16410A (July 2001)
UNIFIED FACILITIES GUIDE SPECIFICATIONS
References are in agreement with UMRL dated 23 June 2005
Latest change indicated by CHG tags
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SECTION 16410A
AUTOMATIC TRANSFER SWITCH AND BY-PASS/ISOLATION SWITCH
12/04
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NOTE: This guide specification covers the
requirements for low voltage applications of
automatic transfer switches (ATS) and ATS with
by-pass/isolation switches.
Comments and suggestions on this guide specification
are welcome and should be directed to the technical
proponent of the specification. A listing of
technical proponents, including their organization
designation and telephone number, is on the Internet.
Recommended changes to a UFGS should be submitted as
a Criteria Change Request (CCR).
Use of electronic communication is encouraged.
Brackets are used in the text to indicate designer
choices or locations where text must be supplied by
the designer.
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PART 1
GENERAL
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NOTE: This guide specification is for use when the
nature of electrical loads indicates a need for
automatic transfer between two power sources.
Terminology used depends on the application.
"Preferred" and "alternate" should be used when this
specification applies to a stand-by generator system
as defined in NFPA 70. The same terminology should
be used when switching between different sets of
service entrance conductors or between feeders
supplied by different transformers. "Normal" and
"emergency" should be used for the emergency system
application described in NFPA 70.
This specification covers conventional, standard,
SECTION 16410A
Page 3
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