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NEC The National Electric Code (NEC) typically identifies the construction techniques and materials necessary in building wiring requirements, i.e., inside plant construction, of fiber optic or coaxial cable systems. The NEC has been adopted by the American National Standards Institute (ANSI). NEC articles 820 and 830 both deal with broadband coaxial cables. Traditional coax networks carry a low-voltage radio frequency (RF) signal. The voltage is so low that it is not considered dangerous. NEC article 820 is written with fire safety, not voltage in mind. However, with the advert of multiple services available over coax systems, the need for powered coax or UTP has arisen. Some of these newer services require that a network interface unit (NIU) be installed at the subscriber’s residence with the NIU being powered via the cable. Generally, if there is a NIU involved, the cable will have to be rated for NEC 830. Basically, higher voltage NEC 830 cables need to be installed to provide greater protection for people than NEC 820 cables. Refer to the charts in Section 5.1/ Aerial Installation or 6.1/Buried Installation for details. Copies of NEC standards can be obtained by calling: 800.344.3555

NESC The National Electric Safety Code (NESC) generally applies to outside plant construction. The NESC defines grades of construction on the basis of strength requirements for reasons of safety. Section 24 of the NESC identifies construction grades B (the highest), C, D, and N (the lowest). The strength requirements for the various grades of construction are defined within Section 26 of the NESC. The NESC has been adopted by the American National Standards Institute (ANSI). Copies of NESC standards can be obtained by calling: 800.678.4333 Municipal, state, county, and local codes are often applied to construction of cable systems or work that involves their respective properties and right-of-ways. Pole Lease Agreements often stipulate specific practices related to safety. These codes, regulations, and specified practices should be investigated, interpreted, communicated and observed.

 

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