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BS 6708 TYPE 621

APPLICATION

Used for supplying excavating, crushing machines and equipment.

Certificates
Technical Information

CONDUCTOR : Electrolytic, stranded, tinned copper wire IEC 60228 Class 5
INSULATION : EPR
LAYUP : Cores are laid up over each other.
BEDDING : Rubber based bedding compound.
ARMOUR : Galvanized steel pliable armour.
OUTER SHEATH : Heavy duty chloroprene outer sheath.

RELATED STANDARDS : BS 6708
RATED VOLTAGE : 3800/6600 V
TEST VOLTAGE : 15 kV

Cross Section 4×35 4×50 4×70 4×95 4×120 4×150
Conductors
Number and cross section mm2 4×35 4×50 4×70 4×95 4×120 4×150
Insulation thickness mm 5.0 5.0 5.0 5.0 5.0 5.0
Cable details
Radial thickness of inner sheath mm 3.8 5.0 5.0 5.0 5.0 5.0
Min. inner sheath diameter mm 53.8 60.5 65.6 70.7 74.3 79.2
Max. inner sheath diameter mm 56.8 63.5 69.4 74.5 78.1 83.2
Size of armour mm 7/0,90 7/1,25 7/1,25 7/1,25 7/1,25 7/1,25
Outer sheath thickness mm 6.0 6.3 7.0 7.5 7.8 8.3
Min. overall diameter mm 71.2 81.0 87.1 93.2 97.4 103.3
Max. overall diameter mm 75.2 85.3 91.4 97.5 101.7 107.6
Min. bending radius mm 752 853 914 975 1.017 1.076
Appx. cable weight kg/km 8.9 11.1 13 14.05 20.6 22
Copper weight kg/km 1.35 1.95 2.7 3.7 4.65 5.8
Electrical details
“Continuous current
rating at 25°C Ambient”
A 135 170 205 250 295 320
Max. DC resistance at 20°C
Conductors Ω /km 0.565 0.393 0.277 0.210 0.164 0.132
Armour Ω /km 0.7 0.5 0.43 0.39 0.38 0.35

 

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