Rubber & Crane Cables
H07 RN-F H05 RR-F 638 TQ 380P 680P Coil End Lead 0361 TQ EPR/HOFR 657 EPR/HOFR 658

Rubber & Crane Cables

EPR/CSP 0361 TQ H0FR Welding Cable Single Core EPR Insulated CSP sheathed to BS 638 Part4 85 Deg 100V

CONSTRUCTION :                         Electrical Characteristics

Conductor: Extra Flexible Class6 Tinned/Plain Copper to BS6360. Flexible Class 5 for 120 mm sq and above

Separator: Crepe Paper /PETP Tape

Insulation: Ethylene Propylene Rubber (E.P.R.) to BS 7655

Sheath: Chlorosulphonated Polythylene (C.S.P.) H.O.F.R. ( Heat and Fire Retardant ) to BS 7655

Sheath Color: Orange ( Tinned conductors ) Black ( Plain conductors )

Flexible aluminium conductors available upon request.

APPLICATION :

This range of Cables are designed as highly flexible voltage leads, primarily for the secondary (high current)

connection to automatic or hand held metal arc welding electrodes .

May also be used for non welding applications such as earthing return leads, flexible tails on power supply.

Busbar connections.

TECHNICAL DATA :

Voltage: 100V (If used in an environment where they are not liable to sustain mechanical damage these Cables

may be used at 450/700V in the control panels, switchgears etc.

Temperature Rating: -20 to +85°C

Bending Radius: 6 x Overall Diameter

RATING FACTORS :

The current ratings given are based on an ambient temperature of 25 Deg.

Rating factors for higher temperatures are: Ambient Temp: 30 Deg 35 Deg 40 Deg 45 Deg

Rating Factor: 0.96 0.91 0.87 0.82

Where total cable lengths in excess of 15m are involved, it may be necessary to use cable of larger cross section

to ensure that the voltage drop is not excessive and welding currents are maintained at adequate levels.

DUTY CYCLE :

The duty cycle is defined as the time for which the current flows expressed as a percentage of the complete

cycle, which is taken as 5 minutes. Since the length of time for which current flows during a welding operation

varies, occasional to continuous, the duty cycle can vary from as little as 20% to a maximum of 100% on

automatic operation.

Automatic Welding up to 100%.

Semi Automatic Welding 30-85%.

Manual Welding 30-60%.

Intermittent or Occasional Welding up to 20%.

Size
MM 		Stranding
Class 		Stranding
MM 		Thickness of Sheath mm Nominal
O/Dia MM 		Weight
Kg / Km 		Max
Duty Cycle
100% 		Max
Duty
Cycle
60% 		Max
Duty
Cycle
30%
16 6 513 / 0.20 2.0 10.9 212 135 175 245
25 6 783 / 0.20 2.0 12.5 300 180 230 330
35 6 1107 / 0.20 2.0 14 403 225 290 410
50 6 1566 / 0.20 2.2 16 560 285 370 520
70 6 2214 / 0.20 2.4 18.6 776 355 460 650
95 6 2997 / 0.20 2.6 21.2 1035 430 560 790
120 5 608 / 0.50 2.8 23.1 1300 500 650 910
185 5 925/0.50 3.2 29.0 2050 660 850 1200

Electrical Characteristics

Electrical Characteristics

Loading Current Values (amperes)

Nominal Cross Sectional Area mm2 Loading Current in Amps for the Following Duty Cycles
mm2 100% 85% 60% 30%
16 135 145 175 245
25 180 195 230 330
35 225 245 290 410
50 285 310 370 520
70 355 385 460 650
95 430 470 560 790
120 500 540 650 910
185 660 715 850 1200

Correction Factors

Cable operating temperature also varies according to the prevailing ambient temperature. These cables are

designed to give optimum performance up to an operating temperature of 85°C at an ambient temperature of

25°C.

The reduction factors for increased ambient temperature are:

Ambient Temperature 30°C 35°C 40°C 45°C 50°C 55°C
Correction Factor 0.96 0.91 0.87 0.82 0.76 0.79

Conductor Resistance (ohms per kilometre) and Voltage Drop

Nominal Cross Sectional Area Maximum Resistance at 20°C Tinned Voltage Drop (For Guidance Only)
Volts Per 100 Amp Per 10 Metres
DC Current *
20°C 60°C 85°C
mm2 ohms/Km V V V
16 1.240 1.240 1.430 1.560
25 0.795 0.795 0.920 0.998
35 0.565 0.565 0.654 0.709
50 0.393 0.393 0.455 0.493
70 0.277 0.277 0.321 0.348
95 0.210 0.210 0.246 0.264
120 0.164 0.164 0.190 0.206
185 0.108 0.108 0.125 0.136

*Note:

The values for AC Current may be much higher, depending on the configuration of the cables.