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Ok. But remember, this is minimum hole to run three RG59 cables. Better way, is run some tube, for future cabling, or faulty cables easy changing or replacing to other cables (Cat5, as an example). I was thinking of running the cable through a conduit box with conduit attached to the back of the box which runs through the wall . do they have any special fittings for conduit boxes to secure the cables and block out water? water is a concern

Hm. Is difficult to combine this three cables and measure necessary diameter ? OK, about 16 mm bit will do that..... Hahaha the reason I asked about the bit was because I didn’t get the cable yet to know the diameter . but hey if we all knew the answers we wouldn’t need forums

I am running three RG-59/U 20AWG lines from outside into my basement I have to go through a brick wall . two lines from the left one from the right running parallel .should I just drill through run the cables and silicone the opening? Underground is not an option . And what size masonry bit do you recommend for three RG-59 Siamese cables ? thanks Dave