NEC in the Facility, April 26, 2011

April 26, 2011
Many facilities are installing wireless routers to provide connectivity between industrial process devices and control systems as well as setting up wireless networks for other reasons

Many facilities are installing wireless routers to provide connectivity between industrial process devices and control systems as well as setting up wireless networks for other reasons. However, wireless routers still require a wired system behind them (usually with Ethernet to the routers). Sometimes, a wireless network ends up being wired even in a "user zone." For example, metallic obstructions may be easier to wire around than to try to surmount wirelessly. If you have broadband, you have a wired system. This means compliance with Art. 830.

If your wired system involves aerial cables (for example, to connect two buildings), you must comply with 830.44. Some key aspects of this section of the NEC include:

  • Where practical, locate broadband cables below electric light or power conductors on their poles.
  • Don't attach broadband cables to a cross-arm that carries electric light or power conductors.
  • Keep broadband cables at least: 8 ft from all points of roofs over which they pass, 9.5 ft above grade, 11.5 ft above areas not subject to truck traffic, and 3 ft from any building openings.
  • Separate broadband cables from other conductors, and fasten securely.

Voice your opinion!

To join the conversation, and become an exclusive member of EC&M, create an account today!

Sponsored Recommendations

Electrical Conduit Comparison Chart

CHAMPION FIBERGLASS electrical conduit is a lightweight, durable option that provides lasting savings when compared to other materials. Compare electrical conduit types including...

Fiberglass Electrical Conduit Chemical Resistance Chart

This information is provided solely as a guide since it is impossible to anticipate all individual site conditions. For specific applications which are not covered in this guide...

Considerations for Direct Burial Conduit

Installation type plays a key role in the type of conduit selected for electrical systems in industrial construction projects. Above ground, below ground, direct buried, encased...

How to Calculate Labor Costs

Most important to accurately estimating labor costs is knowing the approximate hours required for project completion. Learn how to calculate electrical labor cost.