i have always wondered that how water can get into a duct when its supposedly sealed and the ends come in the building?

condensation

Edited April 9, 200719 yr by anguscanplay

condensation

When it's stored outside, when it's transported, etc.

When it's stored outside, when it's transported, etc.

heat generated by current in cable - air getting in each end warmer than earth

loads of reasons for it sparky

Edited April 9, 200719 yr by anguscanplay

heat generated by current in cable - air getting in each end warmer than earth

loads of reasons for it sparky

You've missed the obvious one - Buggerance factor

It only gets in when you least need it.

You've missed the obvious one - Buggerance factor

It only gets in when you least need it.

now theres a very good answer and its true too.

has anyone come accross collapsed ducts in their line of work before.

i have and they are a right pain in the bum.

now theres a very good answer and its true too.

has anyone come accross collapsed ducts in their line of work before.

i have and they are a right pain in the bum.

no sparky169 me old china - thats piles lol

regs

alan

no sparky169 me old china - thats piles lol

regs

alan

now that is a right pain in the bum lol

good 8 core duct cable available from Newey&Eyre 7-2-8C PVC/twbc/PVC pvc braided steel Armour PVC then norm 8 core in side we have used lengths up to 500m but sure you can get longer if req not to expencive

it's very expensive, it's about

hi all,

on long runs armoured my present simular problems to screened cable, as the pF value could be degrading to any multitplexed signal, so if room allows it i'll always go for toughest uPVC conjuit. also allows for an extra cables to be run at the same time or later due to oversight perhaps, in standard cable so pro rata a lot cheaper than a single armoured.

regs

alan

You can we just did at a job for cctv cables and alarm cables app 25m 100m duct we should have had own duct but only draw wire in duct with swa and water main !!! so we drew 2 -20m marshal tuffflex flex conduit through and then pulled cctv in one and alarm in other bit of a job but easer than digging another duct in .