Page 62 - Power Cables Catalogue.pdf

RUBBER CABLE HO7RN-F

Specification : BS-7919

HO7RNF- 450X750V MESC 2005

Application : These heavy duty rubber sheathed cables are suitable for use in dry, damp and wet locations in
open air and in workshops having an explosive atmosphere for medium mechanical stresses. Suitable
for use with industrial and agricultural appliances,heating installations, electric tools and also for
transportable motors and machines.Also suitable for fixed installations on plaster, in temporary
residential buildings and for wiring of constructional components like lifts and cranes. Can be
used upto 1000 volts for fixed installation and as rotor connection cable for motors.

Construction
Conductor : Annealed plain copper stranded as per class 5 of IEC-60228.
Insulation : Rubber Type EI 4 as per BS 7655.
Core Identification : Single core : Black.
Two core : Blue & Brown.
Three core : Green, Blue & Brown.
Four core : Green, Black, Blue & Brown.
Five core : Green, Black, Blue, Brown & Black.
Six core and above : In the outer layer one core coloured Light Blue,
the consecutive core coloured Brown and the
other cores coloured Black.In the other layers
one core coloured Brown and the other cores
coloured Black.
Assembly : Cores twisted together to mak e a round assembly. Where centre
filler is required it is composed of cotton. A binder tape is applied
over the assembly if required.
Outer Sheath : Black coloured rubber Type EM 2 as per BS 7655.Sheath material
is oil resistant and flame retardant as per IEC-60332- 1. The sheath
shall fill the outer interstices between the cores.
Technical Data

Temperature Range : - 30ºC to + 60ºC.
Working voltage : 450 / 750 volts.
Conductor Resistance : As per class 5 of IEC-60228.
Minimum bending radius : 4 X cable Ø for fixed installation
: 5 X cable Ø for guiding over roller.
CURRENT CARRYING CAPACITY AT 30ºC
2 2
Area (mm ) Single Phase (A) Three Phase (A) Area (mm ) Single Phase (A) Three Phase (A)
1.0 10 10 16 76 66
1.5 15 15 25 100 85
2.5 20 20 35 120 100
4 3 3 2 8 5 0 1 5 0 130
6 4 2 3 6 7 0 1 8 0 160
10 57 49 90 220 190
If more than 3 conductors are loaded simultaneously, the current rating must be adjusted with the following factors:
No. of simultaneously loaded cores 5 7 8 12 18 24
Correction factors 0.73 0.65 0.62 0.53 0.45 0.40
Correction factor for ambient temperature :
Ambient temperature 35ºC 40ºC 45ºC 50ºC 55ºC
Correction factor 0.91 0.82 0.71 0.57 0.41

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