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gen.
generator
genset
generator set
GFI
ground fault interrupter
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,
high engine 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
O
inches of water
2
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
10
KB
kilobyte (2
bytes)
kg
kilogram
2
kg/cm
kilograms per square centimeter
kgm
kilogram-meter
3
kg/m
kilograms per cubic meter
kHz
kilohertz
kJ
kilojoule
km
kilometer
kOhm, kΩ 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
3
lbm/ft
pounds mass per cubic feet
A-16 Appendix
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
sound power level, A weighted
wa
LWL
low water level
LWT
low water temperature
m
meter, milli (1/1000)
6
M
mega (10
when used with SI units), male
3
m
cubic meter
3
m
/min.
cubic meters per minute
mA
milliampere
man.
manual
max.
maximum
20
MB
megabyte (2
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, mΩ
milliohm
MOhm, MΩ
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
µF
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
TP-6208 4/03
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