Cable Installation in ducting vs Direct Lay - Difference in planning terms?

Hi Adam

There is a big difference between pulling cables through a duct and laying them in an open trench.

There is a limit to the length of cable that can be pulled in one go - depending on the size and type of cable.

Heavy cable will need a pull winch and intermittent pulling chambers are necessary.

The cost can be offset by not needing armoured cable.

Maybe they want a loose top precast U duct where the cables can be laid normally and the top place on before backfill.

Best regards

Mike Testro

Hi Mike,

Thanks for the comments. I have pulling bays/winches/etc/etc in the plan for pulling the cable through the duct, what I am struggling with is the opinion this is a faster way to lay cable, in my programme it would mean pulling the cable once all ducting is in the ground, rather that intermitant pulls once each section is completed; so it actually extended the programme rather than reducing it. 

This is what I have for trenching and pull on a single section, would you agree with the tasks listed? Excuse all the FS-lag logic I need to correct this as not my doing.

Hi Adam

Sorry your attachment did not open.

Of course pulling cables through a duct will take longer than laying cables in an open trench because you have two FS tasks instead of one..

Send me a private message so that I can recieve your file over email.

Best regards

Mike Testro