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TM 5-684/NAVFAC MO-200/AFJMAN 32-1082
reference in preparing contract requirements for
maintenance to be done by outside service agencies.
This manual provides guidance for the maintenance
and repair of exterior electrical distribution sys-
1-4. Standards of maintenance.
tems. New construction of exterior electrical facil-
Electrical systems will be regularly maintained to
ities, even when funded from maintenance appro-
ensure continued compliance with the codes and
priations, should comply with the appropriate
publications referred to in appendix A. Such main-
design criteria. These systems include substations,
tenance will prevent system and equipment failures
overhead and underground electrical distribution
and ensure maximum safety and efficiency in the
systems, exterior lighting systems, and electrical
utilization of the facilities. At each installation, a
apparatus and components. Guidance for genera-
program for proper maintenance should be estab-
tors and interior electrical systems (600 volts and
lished and effectively followed. This program should
less) are covered in the following publications:
include the scope of work, intervals of performance,
a. TM
and methods of application including safety require-
ments, practices and procedures. When a number of
b. TM 5-685/NAVFAC MO-912.
items require servicing or renewal over a period of
c. MIL-HDBK-1003A/ll.
years, a proportionate number should be main-
tained each year. For instance, if there are 100
1-2. References.
transformers on the system, requiring maintenance
Appendix A contains a list of references used in this
at 5-year intervals, the work should be performed
on 20 transformers each year.
a. Predictive maintenance. A predictive mainte-
1-3. Application of codes and publications.
nance program is more desirable than routine re-
curring maintenance. Predictive testing should oc-
The information in this manual should not super-
c u r periodically but actual maintenance or
sede equipment manufacturers' instructions and re-
replacement should take place only when necessary.
quirements. When conflicts exist the most rigorous
An automated testing and record management sys-
requirement should be followed. A11 maintenance
tem should be utilized where available. Where such
and repair of electrical systems should be performed
a system is not available, its acquisition is recom-
in such a manner that the completed work will
conform to the publications listed below to the de-
b. Sample testing formats. Testing formats for
gree indicated.
cable, circuit breakers, switchgear, and transform-
a. Codes. The listed codes and standard contain
ers are provided in NFPA 70B. These formats can be
rules (both mandatory and advisory) for the safe
revised as needed for local requirements.
installation, maintenance, and operation of electri-
cal systems and equipment.
1-5. Maintenance responsibilities.
(1) The National Electrical Code (NEC), NFPA
An adequate supply of dependable electrical energy
is essential for the accomplishment of the installa-
(2) The National Electrical Safety Code
tion mission. Adherence to a well planned and well
organized maintenance program, including the es-
(3) Occupational Safety and Health (OSHA),
tablishment of specific goals and follow-up proce-
General Industry Standards, 29 CFR 1910.
dures will ensure the proper functioning of the
b. Nongovernment publications. Other nongov-
equipment in the electrical distribution system.
a. Electrical supervisor. As used in this manual,
ernment publications referenced in this manual ex-
pand guidance in line with recognized industry
the title electrical supervisor indicates the indi-
standards. The most extended coverage on recom-
vidual assigned the responsibility for maintenance
mended practices for electrical equipment mainte-
of electrical distribution systems and equipment.
nance, and one that should be used in conjunction
The maintenance of electrical distribution systems
with both the NEC and the NESC, is NFPA 70B.
is the responsibility of the installation's commander
Publication NFPA 70B is recommended as a useful
and a specific duty of an Army director of public


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