THE OKONITE COMPANY Product Data
Section 6: Sheet 2

Okonite X-Ray/Hi-Voltage Cable

65kV, 75kV and 100kV dc Rating
Three Conductor or Four Conductor

A Coated Stranded Copper Conductors

B Polyester Insulation

C Extruded Semiconducting Layer

D Insulation – Okonite

E Semiconducting Tape

F Coated Copper Braid

G Jacket – Okoseal


Applications
Okonite X-Ray cables are suitable for use on X-Ray apparatus for medical, industrial, research and control applications. They give trouble-free performance where pulse type high voltages are required. Although primarily used with medical diagnostic imaging equipment, Okonite X-Ray cables are also used with equipment in industrial applications as well as in research projects where high voltages, low power are required.

Typically, Okonite X-Ray cables are used to supply the anode and cathode voltages to the X-Ray tube. Since one terminal operates at a negative potential and the other at a positive potential, the voltage across the X-Ray tube is twice (2X) the rated voltage of the cable.

The two usual constructions are (1) three conductor (3/C) used on typical cathode cable installations, and (2) four conductor (4/C) utilized on installations with a grid controlled lead. Upon request, designs and constructions can be developed for special applications.

Product Features

  • Performance tested for long trouble-free service.
  • Small diameter.
  • Flexible construction.
  • Excellent flexing endurance.
  • Mechanically rugged.
  • Easy to strip and terminate.
  • Resistant to most oils and chemicals.
  • Complies with NEMA Standard XR-7 where applicable.

Installation
The minimum bending radius for permanent installation or flexing in service is four times the cable diameter.

Specifications
Cable Core: Each cable contains two #15 AWG (19x) [1.65mm2] tinned copper filament wires insulated with heat sealed color coded polyester tape. Three conductor cores include two uninsulated #18 AWG [0.83mm2] flex stranded tinned copper wires. Four conductor cables include one #20 AWG (7x) [0.52mm2] copperweld conductor per ASTM - 45 insulated with heat sealed polyester and shielded with metalized red polyester. The four conductor core includes three uninsulated #18 AWG flex stranded tinned copper wires.

All conductors are twisted together into a composite assembly.

Core Shield: An extruded layer of semiconducting compound encapsulates the composite core assembly.

Insulation: Okonites premium high voltage EPR (ethylene propylene rubber) insulation is extruded in tandem with the semiconducting compound ensuring an intimate contaminant free bond between the layers

Shield: A semiconducting tape is applied over the insulation with a tinned copper wire braid. Minimum coverage indicated in table.

Jacket: A light gray flexible Okoseal (specially compounded PVC) jacket is extruded over the shield to provide additional mechanical strength and resistance to most oils and chemicals.

 

 

1-Description
2-Catalog Number

3-#34 Awg. T.C. Braid Coverage (%)
4-Cellophane Wrap
(1)
5-Jacket Color
6-Insulation O.D. Inches 0.010

7-Insulation O.D. mm 0.25
08-Jacket O.D. Inches 0.015
09-Jacket O.D. mm 0.38
10-Net. Wt. (lbs/1000 ft.)

11-Net. Wt. (kg/100m)
12-Approx. Ship Weight (lbs./1000’)

13-Approx. Ship Weight(kg./100M)
  1 2 3 4 5 6 7 8 9 10 11 12 13

65kV

3 Conductors
2-#15 AWG insulated
1-(2-#18 AWG)
uninsulated

504-22-6040
504-22-6041

80

yes
no

Gray

0.465

11.81

0.605

15.40

219

33

252

38

75kV

3 Conductors
2-#15 AWG insulated
1-(2-#18 AWG)
uninsulated

504-22-3165
504-22-3164
504-22-3836

80
80
95

yes
no
yes

Gray

0.510

12.95

0.650

16.50

236
236
248

35
35
37

273
273
278

41
41
42

4 Conductors
2-#15 AWG insulated
1-#20 AWG
Copperweld, insulated
1-(3-#18 AWG)
uninsulated

504-22-2164

80

no

Gray

0.570

14.48

0.715

18.20

289

43

333

50

75kV
Extra
Small
Diameter

3 Conductors
2-#15 AWG insulated
1-(2-#18 AWG)
uninsulated

504-22-3015

80

no

Gray

0.490

12.45

0.600

15.25

224

34

248

37

100kV

3 Conductors
2-#15 AWG insulated
1-(2-#18 AWG) uninsulated

504-22-1033
504-22-1035

80

no
yes

Gray

0.620

15.75

0.785

19.90

332

49

371

55

4 Conductors
2-#15 AWG insulated
1-(#20 AWG) Copperweld, insulated
1-(3#18 AWG)
uninsulated

504-22-2041

80

no

Gray

0.660

16.75

0.845

21.50

380

57

441

66

Authorized stock Item. Available from our Customer Service Centers.

(1) Cable is helically wrapped with a cellophane tape to maintain cleanliness during installation and includes a pull cord for ease of removal.

- Designs for special applications upon request.
- Refer to Product Data Section 6 Sheet 1 for X-Ray Cable - Low Noise constructions.

Electrical Characteristics

Rated Voltage
Rectified dc kV (2)

Number of
Conductors

Core to Shield
Capacitance 10%


4/C only: Copperweld grid lead capacitance = 70 pF/ft. (230 pF/m).

pF/ft.

pF/m

Conductor resistance @ 25C:

65
75 (ESD)

75
75
100
100
160
250

3
3

3
4
3
4
3
3

52
49.5

47
57
40
49
35
31

170
162

154
187
131
159
115
101

#16 AWG (1.31 mm2) tinned copper = 4.18 ohms/1000 ft (1.37 ohms/100 m)
#15 AWG (1.65 mm2) tinned copper = 3.51 ohms/1000 ft (1.15 ohms/100 m)
#18 AWG (0.83 mm2) tinned copper = 7.16 ohms/1000 ft (2.34 ohms/100 m)
2 X #18 AWG (0.83 mm2) tinned copper = 3.58 ohms/1000 ft (1.17 ohms/100 m)
3 X #18 AWG (0.83 mm2) tinned copper = 2.39 ohms/1000 ft (0.78 ohms/100 m)
#20 AWG (0.52 mm2) copperweld = 24.12 ohms/1000 ft (7.91 ohms/100 m)

(2) Voltage rating is between the conductor and the shielding braid.


B/03040602
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