Electical Contractor

CODE CITATIONS Article 100 Definitions Article 210 Branch Circuits Article 230 Services Article 250 Grounding Article 312 Cabinets, Cutout Boxes and Meter Socket Enclosures Article 445 Generators Article 518 Places of Assembly Disconnect for multiwire branch circuit Q: There was a requirement in the

After almost five years in the making, Category 6 is—believe it or not—now an official standard, having been approved and published.

Previously, I informed you about ongoing activity concerning 10 Gbps Ethernet and a new multimode fiber. In March 2002, TIA approved the standard for this new multimode fiber and probably by the time this article is published, IEEE will have approved the 10 Gbps Ethernet specifications.

In the March 2002 issue, I reported on the activity within the Telecommunications Industry Association (TIA) to develop a cabling system in support of building-automation systems (BAS). At the time of writing that article, the document was out for industry ballot.

TIA Subcommittee TR-42.3, responsible for developing recommendations for pathways and spaces, recently approved Addendum 6 to TIA/EIA-569-A, officially called ANSI/TIA/EIA-569-A-6 Multi-tenant Pathways and Spaces Addendum.

Multimedia applications have just taken over networks. Long gone are the days when the most taxing task for any network was moving data files through itself.

Cable trays can be a very convenient method of transporting large numbers of signaling, communications and control cables, as well as other cables, from one location in a facility to another. If cable trays are to be used, however, some specific requirements must be followed.

CODE CITATIONS Article 110 Requirements for Electrical Installations Article 210 Branch Circuits Article 250 Grounding Article 310 Conductors for General Wiring Article 404 Switches Article 408 Switchboards and Panelboards Article 670 Industrial Machinery Branch circuit for refrigerator in dwelling

CODE CITATIONS Article 100—Definitions Article 210—Branch Circuits Article 230—Services Article 695—Fire Pumps Article 725—Class 1, Class 2, and Class 3 Remote-Control, Signaling, and Power-Limited Circuits Article 760—Fire Alarm Systems Article 770—Optical Fiber Cables and Raceways Article 800—Comm