S dimensions for cables – comparison with metric …

1 1037 LFLEX UNITRONIC ETHERLINE HITRONIC EPIC SKINTOP SILVYN FLEXIMARK ACCESSORIESAPPENDIXFor current information see TableT16: Anglo-american dimensions U S dimensions for cables comparison with metric dimensionsSchematic diagram of the cross section dimensionsIn North America the cross section of cables are mostly stated in AWG sizes (American Wire Gauge) or for bigger cross sections (higher than AWG 4/0) in the dimension kcmil . The respective standards for rating the cable according the ampacity also refer to these multi standard cables have to fulfil the requirements of the metric system, stating the cross section in mm as well as the requirements of the AWG system, in the following these systems are compared on the basis of their nominal consider that there are no definite equivalents, because the requirements of both systems regarding cross sec-tion and conductor resistance differ to each other.

2 The following table should help to find the right nominal cross section. The respective standards for the project planning, UL1581 or IEC 60228 (VDE 0295) have to be applied choosing the appropriate matching parts, conductor end sleeves, always the effective size or cross section has to be re-garded. This dimension is stated on the respective catalogue page of the product 1: Because of the power rating according to the Northamerican standards a cable size of AWG 20 is the catalogue page of the product you cannot find a cable with this AWG size.

3 The table above shows in column 1a the size AWG 20 and in column 3 you can find the metric cross section which fulfils the electrical requirements of AWG 20 at least. Thus a cable with cross section 0,75 mm2 has to be 2: Because of the power rating according to the European standards a cable with cross section 0,75 mm is the catalogue page of the product you only can find AWG sizes or bigger metric cross sections. The table above shows in column 4 the cross section 0,75 mm2 and in column 5a you can find the AWG size which fulfils the electrical requirements of 0,75 mm2 at least.

4 Thus a cable with AWG 18 has to be 18 AWG 200,75 mm21,0 mm2column1a column1b column 2column 3column 4 column 5a column 5bRequired Northamerican dimensionGeo metrical convers ionMetrical nominal cross section, which fulfils the electrical requirementsRequired metrical cross sectionNorthamerican dimension, which fulfils the electrical requirementsAWG kcmilmm2mm2mm2 AWG kcmilcolumn1a column1b column 2column 3column 4 column 5a column 5bRequired Northamerican dimensionGeo metrical convers ionMetrical nominal cross section, which fulfils the electrical requirementsRequired metrical cross sectionNorthamerican dimension.

5 Which fulfils the electrical requirementsAWG kcmilmm2mm2mm2 AWG kcmil 800 500 450 400 350 3004/0 2503/0 2/0 2/0 1 3 24 5 46 7 68 9 810 11 1012 13 1214 15 1416 17 1618 19 19 21 23 2224 25 2426 T161038 LFLEX UNITRONIC ETHERLINE HITRONIC EPIC SKINTOP SILVYN FLEXIMARK ACCESSORIESAPPENDIXFor current information see TableThe basic units are in the english gravitational system: length (ft) force (lbf = Lb) time (s)in the english absolute system: length (ft) mass (lb) time (s) Length dimensions 1 mil = mm1 inch (in; ) = mm 1 foot (ft; ) = m 1 yard (yd) = m 1 chain (ch) = m 1 statue mile = km 1 nautical mile = km 1 statute mile = 1760 yards Cubic dimensions1 cubic inch = cm31 cubic foot = m31 cubic yard = mm31 US liquid gallon = l1 pint = l1 quart = l1 brit gallon = l1 barrel = l Area dimensions1 circ.

6 Mil (CM) = 10-3 mm2 1 kcmil (MCM) = mm2 1 square inch (sq. in.) = mm2 1 square foot ( ) = m2 1 square yard = m2 1 acre = km2 1 square mile = km2 1 m2 = sq. ft. Mass unitsEnglish gravitation system:1 slug = 1 lbs s2/ftEnglish absolute system:1 pound = 1 lb1 slug = lb, with ft/s2 as the standard value of acceleration due to gravity1 grain = mg1 dram = g1 ounce (oz) = 16 drams = g1 pound (lb) = 16 oz = g1 stone = 14 lbs = kg1 US ton (short ton) = t1 Brit.

7 Ton (long ton) = t Units of forceEnglish gravitational system:pound-force 1 lbf = 1 LbEnglish absolute system: poundal 1 pdl = 1 lb ft/s2 1 lbf = pdl lb m/s2 Conversion to metric units:1 pound-force (lbf) = kp1 Brit. ton-force = 1016 kp1 poundal (pdl) = N1 lbf = N Electrical unit per unit length:1 f per mile = F/km1 megohm per mile = M km1 megohm per 1000 ft = km1 ohm per 1000 yd = /km Weight per unit lengtht1 lb per foot = kg/m1 lb per yard = kg/m1 lb per mile = kg/m Density1 lb/ft3 = kg/m3 Weight (specific weight)1 lbf/ft3 = kp/m3 Copper wire weight per milelb/mile mm5 Units of energy1 horsepower = kW ( )1 brit.

8 Therm. unit = kcalThe insulation wall thickness is often expressed in n/64 inches, 1/64 inch being roughly equaled to mm. F urther dimesnions for wire weihjts and for electrical field strengths:lbf pr. MFeet = kg/kmlbf pr. Mile = kg/km40 V/mil = kV/mm80 V/mil = kV/mm100 V/mil = kV/mm250 V/mil = kV/mm G eneral dimensions *:* these units are mostly not in use. They are for information : Anglo-american DimensionsT16