copper
tubes
extruded
extruded
extruded
extruded
extruded
extruded
extruded
extruded
extruded
extruded
extruded
Maksal Tubes
Maksal Extruded Copper Products

Formulae for calculating Mass

ROUND ROD
Diameter 2 in mm x 0.00701 = mass in kg/meter.

SQUARE BAR
Width across flat 2 in mm x 0.00889 = mass in kg/meter.

RECTANGULAR BAR
Width x Thickness in mm x 0.00889 = mass in kg/meter.

ROUND TUBE
(Diameter - Wall Thickness) x Wall Thickness x 0.028 = mass in kg/meter.

Formula for calculating Current
I = Current in Amperes
A = Cross Sectional Area in mm2;
p = perimeter of conductor in mm

Assume that the temperature rise of the conductor is 50°C above the ambient temperature of 40°C, and the resistivity of Copper at 20°C is 1.724 micro Ohm cm, then the current ratings are:

For Flat Bars
I = 7.73 x A0.5p0.39

For Hollow Round Bars
I = 8.63 x A0.5p0.36

For Solid Round Bars
I = 13.6 x A0.68

Hollow Round Bars (Bustube)
I = 8.63 x A0.5 x p0.36