RG6 SDU Cable & CAI Approval

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On November 19, 2015, Posted by , In News,Technical Talk, With Comments Off on RG6 SDU Cable & CAI Approval

RG6 SDU, why is it CAI-approved? After all, what what would be the benefit of approving a cable that is specifically ‘designed’ not to provide optimal performance? To most, the composition of RG6 SDU seems to be counterproductive to signal quality, with its limited copper content. As a result of the inclusion of RG6 SDU in the CAI’s benchmarking scheme, a lot of questions have seemingly been asked of the CAI.
 
RG6, RG6 SDU, RG6 cable, RG6 SDU cable
 
The CAI have recently reiterated why they have included RG6 SDU in their list of benchmarked cables, and have issued clarification as to the suitability of both RG6 SDU and shotgun type 0.65 cable for use on commercial systems.
For the avoidance of doubt, the CAI deems both types of coax mentioned as unsuitable for use in commercial systems. It is the CAI’s view that the test standards for RG6 SDU were introduced solely to satisfy ‘heavy membership demand for economical feeder cables that enabled them to compete in the single dwelling (domestic) market’.
A problem has now arisen in that some electricians have assumed that all CAI-benchmarked cable is the same and it is reported that RG6 SDU cable has made its way into use in sub-feeds in multi dwellings. The CAI have attempted to address this issue by issuing a disclaimer as to the unsuitability of RG6 SDU for multi-dwelling premises and commercial use. Indeed the cable is named as a ‘single dwelling unit’ cable so should not be used for multi-dwelling premises.
The CAI also do not generally advise the use of 0.65 on IRS as a matter of best practice, they have said that its use is permissible to providing the resistance between the outlet and the MET of the building is less than 4Ω, which equates to an approximate maximum length of 30m. The CAI also suggest to contact their technical committee for further information and clarification of any point.
At the same time the CAI have also issued a warning regarding twin 100 type cable as there have been claims that some distributors are claiming that their twin 100 type cable is CAI-approved simply because it is made up of 2 certified ‘100’ cables. The CAI want to inform interested parties that thisis entirely false, and that there is a separate benchmark and benchmarking process for twin 100type cable.

RG6 SDU Cable & Webro

At Webro, not only are our RG6 SDU and 0.65 cable (WF65) CAI-approved, but we also hold the only (as yet) CAI benchmark for our twin 100 type cable. Twinsat is two of our WF100 (itself CAI-approved) cables in shotgun configuration, and includes solid plain copper conductors with foam polyethylene dielectric, copper foil tape and a plain copper wire braid. In addition, both our RG6 SDU and WF65 twin cables have CAI-accreditation.
In short, CAI-benchmarking guarantees that a cable is sufficient for use for the task that it has been benchmarked for. The CAI have refined the criteria from original parameters laid down by BSkyB during Sky’s transition to digital only satellite broadcasting.
A full list of CA_-benchmarked cables can be found here.

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