This is "Technically" known as "Siamese" or "Siamese Cable".
Installed apx. 100,000 KM of the stuff!
The PVC (CMR, Riser, etc.) type Jacketed Cable has a larger O.D. than the Plenum (CMP) type Jacketed Cable. Also, the Plenum Rated stuff pulls through Conduits better, but costs 2× - 3× the $$$ of PVC (Riser) Cable.
Cable Manufacturers will have the O.D. displayed on their web sites.
BTW, thanks for the links! Will check 'em out.
Scott " 35 " Thompson Just Say NO To Green Eggs And Ham!
The 40% fill req. is more of a TIA/EIA req. rather than NEC req.
If you do tele/data, or CATV etc. you may want to check these out. They are not all of the standard in it's actual format, but seeing that the go for $200 bucks each, these trunkated versions/explanations are just fine. Also very informative..... http://web.anixter.com/Anixter/anixter.nsf/Standards?OpenForm
-------------------------------- Just looked at them again, the pages have changed, they used to have a lot more information on them before.
[This message has been edited by e57 (edited 10-11-2004).]
Mark Heller "Well - I oughta....." -Jackie Gleason