Cable diameter

Fig. 13-1 Resistance load R of cable sheathing as a function of cable diameter d and sheathing material.

Type of protection EEx dl Certificate INERIS 95.D.7027X Rated voltage 1100 V 3 AC Rated current 450 A Cable conductor cross-section up to 185 mm2 Auxiliary contacts 4 mm2 Cable conductor cross-section 6 mm2 (Top to bottom) two plugs for different cable diameters socket with mounting flange longitudinal section of a plug. 

Ri = insulation resistance, Mega-Ohm.km R2 = cable diameter, mm Rl = wire diameter, mm. 

The total width of the sample should not exceed 300 mm. Cables having an individual conductor cross-section greater than 35 mm should be fixed to the ladder and spaced apart by half the cable diameter but the spacing should not exceed 20 mm. When the number of cables mounted in this way corresponding to the above... 

The cable is easy to handle during installation, is pliable and may be bent to a radius of eight times the cable diameter. The PVC insulation would be damaged if installed in ambient temperatures over 70°C or below 0°C, but once installed the cable can operate at low temperatures. 

The cable may be laid directly in the ground, in ducts, on cable tray or clipped directly to a structure. It is not affected by water, oil or the cutting fluids used in engineering and can withstand very high temperatures or even fire. The cable diameter is small in relation to its current-carrying capacity and it should last indefinitely if correctly installed because it is made from inorganic materials. 

Approximately one-third cable diameter was adopted as a satisfactory minimum spacing in splice design. 

Corrugated copper cables are designed to withstand bending with no change in properties. Low-density foam- and air-dielectric cables generally have a minimum bending radius of ten times the cable diameter. Super flexible versions provide a smaller allowable bending radius. 

Fig. 13a. Corrugated aluminum sheath with stop mark in center of picture after 18 bends over the 20-fold cable diameter. Outside diameter of sheath 07 mm...

Fig. 37 shows the same die-block with tooling inserts for smallest cable diameters. 

---