FLUORESCENT LAMPA low-pressure mercury
electric-discharge lamp in which a fluorescing
coating on its inner surface transforms some of the
ultraviolet energy generated by the discharge into
GROUNDA conducting connection, whether
intentional or accidental, between an electrical
circuit or equipment and the earth.
GROUNDING CONDUCTORAconductor used to
connect equipment or the grounded circuit of a
wiring system to a grounding electrode.
embedded in the earth for maintaining ground
potential on conductors connected to it.
ignitable vapors or dust might cause a fire or
explosion created by energy emitted from lighting
or other electrical equipment.
HYDROMETERAn instrument used to measure
specific gravity. In batteries, hydrometers are used
to indicate the state of change by the specific
gravity of the electrolyte.
INDUCTANCEThe property of a circuit that tends
to oppose a change in the existing current flow.
INDUCTIONThe act or process of producing
voltage and current by the relative motion of a
magnetic field across a conductor.
INDUCTION MOTORA simple, rugged, ac motor
with desirable characteristics. The rotor is
energized by transformer action (induction) from
INSULATIONA material used to prevent the
leakage of electricity from a conductor and provide
mechanical spacing or support as protection against
accidental contact with the conductor.
INSULATORA device having high electrical
resistance; used for supporting or separating
conductors so as to prevent undesired flow of
current from the conductors to other objects.
ISOMETRIC WIRING DIAGRAMA diagram
showing the outline of a structure and the location
of equipment, such as panels, and junction boxes,
and cable runs.
scheduled work required to preserve or restore a
facility or equipment so that it can be used effec-
tively for its designed purpose. It includes work to
prevent damage to or the deterioration of a facility
that would otherwise be more costly to restore.
MEPMobile electric power.
MILITARY SPECIFICATIONS (MILSPEC)
Technical requirements and standards adopted by
the Department of Defense that must be met by
vendors selling materials to DoD.
MILITARY STANDARDS (MIL-STD)Standards
of performance for components or equipment that
must be met to be acceptable for military systems.
MOCCMount-out control center.
MOTORA machine that converts electrical energy
to mechanical energy. It is activated by ac or dc
voltage, depending on the design.
MOTOR LOADAny device driven by a motor.
Typical loads are drills, saws, water pumps,
generators, and so forth. The speed and power
capabilities of a motor must be matched to the speed
and power capabilities of the motor load.
MOTOR STARTERSResistive devices placed in
series with dc motor armatures to prevent the
armature from drawing excessive current until
armature speed develops counter emf.
MSDSMaterial Safety Data Sheet. A mandatory
form that should accompany any hazardous mate-
rials being issued to or used by naval personnel.
NAVFACENGCOMNaval Facilities Engineering
Command. Manages the planning, design, and
construction of the U.S. naval facilities around the
NAVSUPNaval Supply Command.
NCBCNaval Construction Battalion Center.
NCFNaval Construction Force.
NEC®National Electrical Code®.
NFPANational Fire Protection Agency.
OHMThe unit of electrical resistance; that value of
electrical resistance through which a constant
potential difference of 1 volt across the resistance
will maintain a current flow of 1 ampere through the
OICOfficer in charge.
OPEN CIRCUITA circuit that does not provide a
complete path for the flow of current.