CW1128 jelly fill duct grade telephone

CW1128 jelly filled telephone cable is used to interconnect equipment in fixed installations. The petroleum jelly filling (PJF) acts as a water barrier so that the cable can be used in wet areas. The duct grade outer sheath is made from tough, durable polyethylene which is also UV and sunlight resistant. 

These CW1128 cables are suitable for use in ducts or outdoors where an armoured cable is not required. Ideal for clipping around the outside of buildings or running through ducting. Not recommended for direct burial applications. They offer a lightweight, compact and tough solution where cables are needed that will have to endure a variety of weather conditions. Not recommended for indoor use. 


Construction – CW1128 jelly filled telephone
solid plain copper conductors
polyethylene (PE) core insulation
cores twisted into pairs or into quad formation
petroleum jelly filler (PJF) with paper wrap
black duct grade PE outer sheath


Technical – CW1128 jelly filled telephone
conductor make-up: 1x 0.5mm diameter (0.196mm2 area)
  1x 0.9mm diameter (0.636mm2 area)
bend radius: 10 x overall diameter fixed
maximum capacitance: 275pF/Km maximum
resistance @ 20°C: 1/0.5mm cores = 97.8 Ω/km max. per core
  1/0.9mm cores = 12.4 Ω/km max. per core
temperature range: 0°C to +40°C operating
construction: generally to British Telecom CW1128
core identification: coloured according to CW1128, see Colour Codes page


A printable PDF specification is available here: CW1128 jelly filled (PJF) duct grade telephone cable.


For alternative armoured &/or screened versions return to the Coaxial and Telephone front page.


All measurements should be considered nominal and images for illustration purposes only. Although Central Cables Ltd has made every reasonable effort to ensure its accuracy, the information contained herein is subject to error or omission and to change without notice. In no event will Central Cables Ltd be liable for any damages whatsoever, arising in connection with the information described.