Mains and Coax in the same conduit??

You may use a dual back box - but leave the metal seperator in place.
 
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breezer said:
its against the regs to put selv (coax in your case) cables in the same conduit as lv(MAINS) end of.

there is also the saftey aspect
Not exactly true as the regs allow it if otherwise impractical as long as the insulation allows for the highest voltage present, they also mention extra insulation(double)
Personally i would seperate anyway as there is enough noise/interference caused by equipment these days what with switched mode power supplies etc to gamble on whether the coax screen will adequately screen any interference.
 
You are only allowed to put LV cables in the same trunking or channelling as mains if the insulation on the LV is rated to mains voltages.

But there is trunking on the market with a barrier down the middle. or you could cut one channel, but wider, and run them in sep. capping.
 

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