17
Technical Data TD00405018E
Effective August 2009
Generator Sizing Guide
EATON CORPORATION www.eaton.com
Weights and Measures
Metric System
Prefixes
A. Mega = 1,000,000 E. Deci = 0.1
B. Kilo = 1,000 F. Centi = 0.01
C. Hecto = 100 G. Milli = 0.001
D. Deka = 10 H. Micro = 0.000001
Linear Measurement (The unit is the meter = 39.37 Inches)
1 Centimeter = 10 Millimeters = 0.3937011 Inches
1 Decimeter = 10 Centimeters = 3.9370113 Inches
1 Meter = 10 Decimeters = 1.0936143 Yards
3.2808429 Feet
1 Dekameter = 10 Meters = 10.936143 Yards
1 Hectometer = 10 Dekameters = 109.36143 Yards
1 Kilometer = 10 Hectometers = 0.62137 Mile
1 Myriameter = 10,000 Meters
Square Measurement (The unit is the square meter = 1549.9969 Square Inches)
1 Sq.
Centimeter
= 100 Sq. Millimeters = 0.1550 Sq. Inches
1 Sq.
Decimeter
= 100 Sq. Centimeters = 15.550 Sq. Inches
1 Sq. Meter = 100 Sq. Decimeters = 10.7639 Sq. Feet
1 Sq.
Dekameter
= 100 Sq. Meters = 119.60 Sq. Yards
1 Sq.
Hectometer
= 100 Sq. Dekameters
1 Sq.
Kilometer
= 100 Sq. Hectometers
(The unit is the “Are” = 100 Square Meters)
1 Centiare = 10 Milliares = 10.7643 Sq. Feet
1 Deciare = 10 Centiares = 11.96033 Sq. Yards
1 Are = 10 Deciares = 119.6033 Sq. Yards
1 Dekare = 10 Ares = 0.247110 Acres
1 Hektare = 10 Dekares = 2.471098 Acres
1 Sq.
Kilometer
= 100 Hektares = 0.38611 Sq. Mile
Cubic Measure (The unit is the “Stere” = 61,025.38659 Cubic Inches)
1 Decistere = 10 Centisteres = 3.531562 Cubic Inches
1 Stere = 10 Decisteres = 1.307986 Cubic Yards
1 Dekastere = 10 Steres = 13.07986 Cubic Yards
Metric Designator and Trade Sizes
Metric Designator
12 16 27 35 41 53 63 78 91 103 129 155
Trade Size
3/8 1/2 1 1
1/4
1
1/2
2 2
1/2
3 3
1/2
4 5 6
U.S. Weights & Measures / Metric Equivalent Chart
In. Ft. Yd. Mile Mm Cm M Km
1 inch = 1 .0833 .0278 1.578 x
10
-5
25.4 2.54 .0254 2.54 x
10
-5
1 Foot = 12 1 .333 1.894 x
10
-4
304.8 30.48 .3048 3.048 x
10
-4
1 Yard = 36 3 1 5.6818 x
10
-4
914.4 91.44 .9144 9.144 x
10
-4
1 Mile = 63,360 5,280 1,760 1 1,609,344 160,934.4 1,690.344 1.609344
1 Mm = .03937 .0032808 1.0936 x
10
-3
6.2137 x
10
-7
1 0.1 0.001 0.000001
1 Cm = .3937 .0328084 .0109361 6.2137 x
10
-6
10 1 0.01 0.00001
1 M = 39.37 3.28084 1.09361 6.2137 x
10
-4
1000 100 1 0.001
1 Km = 39,370 3,280.84 1,093.61 0.62137 1,000,000 100,000 1,000 1
Scientific Notation:
A way of expressing very large or very small numbers in a more compact format. Any number
can be expressed as a number between 1 & 10, multiplied by a power of 10 (which indicates
the correct position of the decimal point in the original number). Numbers greater than 10 have
positive powers of 10, and numbers less than 1 have negative powers of 10.
Useful Conversions / Equivalents
1 BTU Raises 1 Lb. of water 1
o
F
1 Gram Calorie Raises 1 Gram of water 1
o
C
1 Circular Mil = 0.7854 Sq. Mil
1 Sq. Mil = 1.27 Cir. Mils
1 Mil = 0.001
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