All the work you will be doing as a part of a Commercial or residential low voltage installation is covered by codes, standard and regulations. Standards are typically developed by manufactures and users in the industry to promote a minimum level of quality, standard and good practices. There are two important telecommunication industry association or TIA standards that cover telecommunication cabling and in buildings.


TIA/EIA 568 is for commercial buildings and TIA/EIA 570 is for residential buildings. They address the requirements for cable, hardware, design and installation. TIA 570 covers residential single and multi-family installations.  The single family section of 570A covers the specifications for the network interface demarcation point, auxiliary disconnect, the distribution device in cable cross connect, the cable and cable installation,  outlets and connectors and equipment court. Outside services are brought to the house and terminate in a network interface device or an NID, a location or device that defines the termination point for outside network like cable TV or telephone service. The NID contains a demarcation point where services can be disconnected from in house wiring. There is also an auxiliary disconnect where outside services can be disconnected at the distribution device. In the NID, the box located on the outside the house where the local service providers like the telephone company bring and terminate their service. The box is supplied by the local service providers such is Rogers, Bell, Shaw etc.

Cable service companies also typically use NID box which has a grounding block and splitters or filters depending on the service to the house. The outside services terminate in the distribution device. Its primary function is to support the voice, data, broadband RF etc. To do this it has three primary function , firstly it terminates the outside services, second it provides all the equipment necessary to support the in home networks such as amplification, cross connected, Network hubs and so on and third it  provides a very flexible means to interconnect the outside services to specific network in home outlets and product. Per GIA 570, a cable runs will be home run from the distribution device to each outlet jack. That means that each jack is a dedicated cable back to the distribution device. Older style wiring were outlets were wired together on the same cable called daisy chaining is no longer used. The standard also defines the minimum number and types of cables and outlets in two grades of service. Grade 1 is a minimum requirement to support traditional analog applications and services.  Grade 2 is intended to support multimedia applications. These includes data network support as well as distributing in home generated video sources . And the standard also states and each branch cable not exceed 90 meters or 295 feet. This is to allow them to be used for data applications as well as traditional analog applications. And then quick my cords not exceed ten meters are 32 P. this gives a total link that one hundred meters or three internet 2017 from attached devices to the distribution equipment connection. Will be referring to apple double park city IA 570 throughout this course