NEC on Buried Coax Drop Cable

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	Question by Bob Oberhaus posted 15 Jan 2001
	NEC on Buried Coax Drop Cable
What is the NEC standards on buried coax drop cable to the subscribers home? We are deploying an HFC network that will offer cable tv, telephone service, high speed date and cable modem service all on one coax. The service drop will carry 90 VAC on the coax to power the NID (network interface device) on the side of the house. The question is, are there any special requirments on this application? Thanks
	Answer by Roman Kitaev posted 17 Jan 2001
Bob, The NEC has a dedicated Article 830 for network-powered broadband communications systems. Unfortunately, there is a lot of requirements there and, because of the volume, I can not list all of them. In general, Article 830 covers locations, fire resistance, installation and use, power limitations, listing and marking, mechanical execution of work, cables outside and entering buildings, protection, grounding methods. Because the NEC requirements are the law, I advise you buying the NEC. This will be a very useful and wise investment because you will use it very oftenly. Best regards, Roman Kitaev, RCDD
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