TP-6126 8/02A-58 Appendix
GND,
ground
gov. governor
gph gallons per hour
gpm gallons per minute
gr. grade, gross
GRD equipment ground
gr. wt. gross weight
H x W x D height by width by depth
HC hex cap
HCHT high cylinder head temperature
HD heavy duty
HET high exhaust temperature
hex hexagon
Hg mercury (element)
HH hex head
HHC hex head cap
HP horsepower
hr. hour
HS heat shrink
hsg. housing
HVAC heating, ventilation, and air conditioning
HWT high water temperature
Hz hertz (cycles per second)
IC integrated circuit
ID inside diameter, identification
IEC International Electrotechnical Commission
IEEE Institute of Electrical and Electronics Engineers
IMS improved motor starting
in. inch
in. H
2
O inches of water
in. Hg inches of mercury
in. lbs. inch pounds
Inc. incorporated
ind. industrial
int. internal
int./ext. internal/external
I/O input/output
IP iron pipe
ISO International Organization for Standardization
J joule
JIS Japanese Industry Standard
k kilo (1000)
K kelvin
kA kiloampere
KB kilobyte (2
10
bytes)
kg kilogram
kg/cm
2
kilograms per square centimeter
kgm kilogram-meter
kg/m
3
kilograms per cubic meter
kHz kilohertz
kJ kilojoule
km kilometer
kOhm, kW kilo-ohm
kPa kilopascal
kph kilometers per hour
kV kilovolt
kVA kilovolt ampere
kVAR kilovolt ampere reactive
kW kilowatt
kWh kilowatt-hour
kWm kilowatt mechanical
L liter
LAN local area network
L x W x H length by width by height
lb. pound, pounds
lbm/ft
3
pounds mass per cubic feet
LCB line circuit breaker
LCD liquid crystal display
ld. shd. load shed
LED light emitting diode
Lph liters per hour
Lpm liters per minute
LOP low oil pressure
LP liquefied petroleum
LPG liquefied petroleum gas
LS left side
L
wa
sound power level, A weighted
LWL low water level
LWT low water temperature
m meter, milli (1/1000)
M mega (10
6
when used with SI units), male
m
3
cubic meter
m
3
/min. cubic meters per minute
mA milliampere
man. manual
max. maximum
MB megabyte (2
20
bytes)
MCM one thousand circular mils
MCCB molded-case circuit breaker
meggar megohmmeter
MHz megahertz
mi. mile
mil one one-thousandth of an inch
min. minimum, minute
misc. miscellaneous
MJ megajoule
mJ millijoule
mm millimeter
mOhm, mW
milliohm
MOhm, MW
megohm
MOV metal oxide varistor
MPa megapascal
mpg miles per gallon
mph miles per hour
MS military standard
m/sec. meters per second
MTBF mean time between failure
MTBO mean time between overhauls
mtg. mounting
MW megawatt
mW milliwatt
mF microfarad
N, norm. normal (power source)
NA not available, not applicable
nat. gas natural gas
NBS National Bureau of Standards
NC normally closed
NEC National Electrical Code
NEMA National Electrical Manufacturers Association
NFPA National Fire Protection Association
Nm newton meter
NO normally open
no., nos. number, numbers
NPS National Pipe, Straight
NPSC National Pipe, Straight-coupling
NPT National Standard taper pipe thread per general use
NPTF National Pipe, Taper-Fine
NR not required, normal relay
ns nanosecond
OC overcrank
OD outside diameter
OEM original equipment manufacturer
OF overfrequency
opt. option, optional
OS oversize, overspeed
OSHA Occupational Safety and Health Administration
OV overvoltage
oz. ounce
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