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US-American and British units -
Conversion of usual measuring units
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Units for cables and wires
In the US the measurements are mainly used in AWG-numbers (AWG = American Wire Gauge). The AWG-numbers conform the British B&S-numbers (B&S = Brown & Sharp)
| AWG No. |
Cross-section mm² |
Diameter mm |
Conductor Resistance Ohm/km |
AWG No. |
Cross-section mm² |
Diameter mm |
Conductor Resistance Ohm/km |
| 1000 MCM* |
507 |
25.4 |
0.035 |
14 |
2.08 |
1.63 |
8.79 |
| 750 |
380 |
22.0 |
0.047 |
15 |
1.65 |
1.45 |
11.20 |
| 600 |
304 |
19.7 |
0.059 |
16 |
1.31 |
1.29 |
14.70 |
| 500 |
254 |
20.7 |
0.07 |
17 |
1.04 |
1.15 |
17.80 |
| 400 |
203 |
18.9 |
0.09 |
18 |
0.8230 |
1.0240 |
23.0 |
| 350 |
178 |
17.3 |
0.10 |
19 |
0.6530 |
0.9120 |
28.3 |
| 300 |
152 |
16.0 |
0.12 |
20 |
0.5190 |
0.8120 |
34.5 |
| 250 |
127 |
14.6 |
0.14 |
21 |
0.4120 |
0.7230 |
44.0 |
| 4/0 |
107.2 |
11.68 |
0.18 |
22 |
0.3250 |
0.6440 |
54.8 |
| 3/0 |
85.0 |
10.40 |
0.23 |
23 |
0.2590 |
0.5730 |
70.1 |
| 2/0 |
67.5 |
9.27 |
0.29 |
24 |
0.2050 |
0.5110 |
89.2 |
| 0 |
53.4 |
8.25 |
0.37 |
25 |
0.1630 |
0.4550 |
111.0 |
| 1 |
42.4 |
7.35 |
0.47 |
26 |
0.1280 |
0.4050 |
146.0 |
| 2 |
33.6 |
6.54 |
0.57 |
27 |
0.1020 |
0.3610 |
176.0 |
| 3 |
26.7 |
5.83 |
0.71 |
28 |
0.0804 |
0.3210 |
232.0 |
| 4 |
21.2 |
5.19 |
0.91 |
29 |
0.0646 |
0.2860 |
282.0 |
| 5 |
16.8 |
4.62 |
1.12 |
30 |
0.0503 |
0.2550 |
350.0 |
| 6 |
13.3 |
4.11 |
1.44 |
31 |
0.0400 |
0.2270 |
446.0 |
| 7 |
10.6 |
3.67 |
1.78 |
32 |
0.0320 |
0.2020 |
578.0 |
| 8 |
8.366 |
3.26 |
2.36 |
33 |
0.0252 |
0.1800 |
710.0 |
| 8 |
6.63 |
2.91 |
2.77 |
34 |
0.0200 |
0.1600 |
899.0 |
| 10 |
5.26 |
2.59 |
3.64 |
35 |
0.0161 |
0.1430 |
1125.0 |
| 11 |
4.15 |
2.30 |
4.44 |
36 |
0.0123 |
0.1270 |
1426.0 |
| 12 |
3.30 |
2.05 |
5.41 |
37 |
0.0100 |
0.1130 |
1800.0 |
| 13 |
2.62 |
1.83 |
7.02 |
38 |
0.00795 |
0.1010 |
2255.0 |
4/0 is also stated: 0000; 1 mil = 0.001 inch = 0.0254 mm
* for bigger cross-section the sizes in MCM (circular mils) |
39 |
0.00632 |
0.0897
|
2860.0 |
1 CM = 1 Circ. mil. = 0.0005067 mm²
1 MCM = 1000 Circ. mils = 0.5067 mm² |
General Measuring Units
Length
1 mil |
= 0.0254 mm |
1 in (inch) |
= 25.4 mm |
1 ft (foot) |
= 0.3048 m |
1 yd (yard) |
= 0.9144 m |
1 ch (chain) |
= 20.1 m |
1 mile (land mile) |
= 1.609 km |
|
= 1760 yards |
1 mile (nautic mile) |
= 1.852 km |
1 mm |
= 0.039370 inches |
1 m |
= 39.370079 inches |
Area
1 CM (circ. mil) |
= 0.507 x 10-3 mm² |
| 1 MCM |
= 0.5067 mm² |
1 sq. inch (sq. inch) |
= 645.16 mm² |
1 sq. ft. (sq. foot) |
= 0.0929 m² |
1 square yard |
= 0.836 m² |
1 acre |
= 4047 m² |
1 square mile |
= 2.59 km² |
Density
1 cu. in. (cubic inch) |
= 16.39 cm³ |
1 cu. ft. (cubic foot) |
= 0.0283 m³ |
1 cu. yd. (cubic yard) |
= 0.7646 m³ |
1 gal. (US gallon) |
= 3.785 l |
1 gal. (brit gallon) |
= 4.546 l |
1 US pint |
= 0.473 l |
1 US quart |
= 0.949 l |
1 US barrel |
= 158.8 l |
Temperature
F (Fahrenheit) |
= (1.8 x C) + 32° |
C (Celsius) |
= 0.5556 x (F - 32°) |
Weight
1 grain |
= 64.8 mg |
1 dram |
= 1.77 g |
1 oz (ounce) |
= 28.35 g |
| 1 lb (pound) |
= 0.4536 Kp |
| 1 stone |
= 6.35 Kp |
| 1 qu (quarter) |
= 12.7 Kp |
| 1 US-cwt
(hundred-weight) |
= 45.36 Kp |
1 US ton (short ton) |
= 0.907 t |
1 brit. ton (long ton) |
= 1.016 t |
Force
1 lb |
= 4.448 N |
| 1 brit. ton |
= 9954 N |
| 1 pdl (Poundal) |
= 0.1383 N |
| I kp |
= 9.81 N |
| 1 N |
= 0.102 kp |
Velocity
1 mile/h |
= 1.609 km/h |
1 Knoten |
= 1.852 km/h |
1 ft/s |
= 0.305 m/s |
1 ft/min |
= 5.08 x 10-3 m/s |
|
Energy
1 lb/mile |
= 0.282 kg/m |
1 lb/yard |
= 0.496 kg/m |
1 lb/foot |
= 1.488 kg/m |
Radiation absorbed dose
1 Cray |
= 1 J/kg |
1 rad |
= 10-2 J/kg = 1 Centi Gy = 0.01 Gy |
1 Centi |
= 100 Joule |
1 rad |
= cJ/kg = 0.01 Gy |
1 Mrad |
= 106 cJ/kg |
Pressure
| 1 psi (lb/sq.) |
= 68.95 mbar |
| |
= 6.895 x 10-3 Nmm² |
1 lb/sq. ft. |
= 0.478 mbar |
1 pdl/sq. ft. |
= 1.489 N/m² |
1 in Hg |
= 33.86 mbar |
1 ft H2O |
= 29.89 mbar |
1 in H2O |
= 2.491 mbar |
1 N/mm² |
= 145 psi = 10 bar |
1 kp/mm² |
= 1422 psi |
1 at |
= 736 Torr = 1 kp/cm² |
1 Torr |
= 1 mm Hg |
1 bar |
= 0.1 H Pa |
1 Pa
|
= 1 N/m² |
Density
1 lb/cu. ft. |
= 16.02 kg/m³ |
1 lb/cu. in. |
= 27.68 t/m³ |
Horse power
1 hp x h |
= 1.0139 PS x h |
|
= 2.684 x 106 Joule |
|
= 746 Wh |
1 BTU (brit. therm. unit) = 1055 Joule |
Electrical units
1 ohm/1000 yd |
= 1.0936 Ω/km |
1 ohm/1000 ft |
= 3.28 Ω/km |
1 µF/mile |
= 0.62 μ |
1 megohm/mile |
= 1.61 MΩ/km |
1 µµf/foot |
= 3.28 pF/m |
1 decibel/mile |
= 71.5 mN/m |
Power rate
1 PS |
= 0.736 kW |
1 kW |
= 1.36 PS |
1 hp |
= 0.7457 kW |
1 kW |
= 1.31 hp |
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Hazardous Location / Explosive Proof Cord Grips, Cable Glands: are stamped with the approvals on the products showing your application is EEx e or ATEX compliant.
Materials: Nylon, Nickel Plated Brass, PVDF & Stainless Steel. |
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