Appendix A Abbreviations
The following list contains abbreviations that may appear in this publication.
A, amp | ampere |
ABDC | after bottom dead center |
AC | alternating current |
A/D | analog to digital |
ADC | analog to digital converter |
adj. | adjust, adjustment |
ADV | advertising dimensional |
| drawing |
AHWT | anticipatory high water |
| temperature |
AISI | American Iron and Steel |
| Institute |
ALOP | anticipatory low oil pressure |
alt. | alternator |
Al | aluminum |
ANSI | American National Standards |
| Institute |
| (formerly American Standards |
| Association, ASA) |
AO | anticipatory only |
API | American Petroleum Institute |
approx. | approximate, approximately |
AR | as required, as requested |
AS | as supplied, as stated, as |
| suggested |
ASE | American Society of Engineers |
ASME | American Society of |
| Mechanical Engineers |
assy. | assembly |
ASTM | American Society for Testing |
| Materials |
ATDC | after top dead center |
ATS | automatic transfer switch |
auto. | automatic |
aux. | auxiliary |
A/V | audiovisual |
avg. | average |
AVR | automatic voltage regulator |
AWG | American Wire Gauge |
AWM | appliance wiring material |
bat. | battery |
BBDC | before bottom dead center |
BC | battery charger, battery |
| charging |
BCA | battery charging alternator |
BCI | Battery Council International |
BDC | before dead center |
BHP | brake horsepower |
blk. | black (paint color), block |
| (engine) |
blk. htr. | block heater |
BMEP | brake mean effective pressure |
bps | bits per second |
br. | brass |
BTDC | before top dead center |
Btu | British thermal unit |
Btu/min. | British thermal units per minute |
CCelsius, centigrade
cal. calorie
CARB | California Air Resources Board |
CB | circuit breaker |
cc | cubic centimeter |
CCA | cold cranking amps |
ccw. | counterclockwise |
CEC | Canadian Electrical Code |
cert. | certificate, certification, certified |
cfh | cubic feet per hour |
cfm | cubic feet per minute |
CG | center of gravity |
CID | cubic inch displacement |
CL | centerline |
cm | centimeter |
CMOS | complementary metal oxide |
| substrate (semiconductor) |
cogen. | cogeneration |
com | communications (port) |
coml | commercial |
Coml/Rec | Commercial/Recreational |
conn. | connection |
cont. | continued |
CPVC | chlorinated polyvinyl chloride |
crit. | critical |
CRT | cathode ray tube |
CSA | Canadian Standards |
| Association |
CT | current transformer |
Cu | copper |
cu. in. | cubic inch |
cw. | clockwise |
CWC | city |
cyl. | cylinder |
D/A | digital to analog |
DAC | digital to analog converter |
dB | decibel |
dBA | decibel (A weighted) |
DC | direct current |
DCR | direct current resistance |
deg., ° | degree |
dept. | department |
dia. | diameter |
DI/EO | dual inlet/end outlet |
DIN | Deutsches Institut fur Normung |
| e. V. (also Deutsche Industrie |
| Normenausschuss) |
DIP | dual inline package |
DPDT | |
DPST | |
DS | disconnect switch |
DVR | digital voltage regulator |
E, emer. | emergency (power source) |
EDI | electronic data interchange |
EFR | emergency frequency relay |
e.g. | for example (exempli gratia) |
EG | electronic governor |
EGSA | Electrical Generating Systems |
| Association |
EIA | Electronic Industries |
| Association |
EI/EO | end inlet/end outlet |
EMI | electromagnetic interference |
emiss. | emission |
eng. | engine |
EPA | Environmental Protection |
| Agency |
EPS | emergency power system |
ER | emergency relay |
ES | engineering special, |
| engineered special |
ESD | electrostatic discharge |
est. | estimated |
emergency stop | |
etc. | et cetera (and so forth) |
exh. | exhaust |
ext. external
FFahrenheit, female
fglass. fiberglass
FHM | flat head machine (screw) |
fl. oz. | fluid ounce |
flex. | flexible |
freq. | frequency |
FS | full scale |
ft. | foot, feet |
ft. lb. | foot pounds (torque) |
ft./min. | feet per minute |
g | gram |
ga. | gauge (meters, wire size) |
gal. | gallon |
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. H2O | inches of water |
in. Hg | inches of mercury |
in. lb. | 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 |
kkilo (1000)
K kelvin
Appendix 55