lightning protections FREE cabling and networking Helpdesk
 Question by B Cudmore posted 09 Aug 2000
 lightning protections
What type of lightning protections should be installed between buildings on cat5 or cat 3 cable? Cable runs inside conduit either above canopy, below canopy and burial.

This is for a school district in Texas.

 Answer by Dmitri Abaimov posted 09 Aug 2000
The fact is that you are not always have to protect those circuits.

If the conduit is mounted on a building's wall, it's under the protection of the building itself. Besides, if the conduit is made of metal and grounded properly, you don't need to protect the cable that's inside.

In those cases when the cable is running out of the building for more than 30 meters (150ft), you have to protect the circuits at both ends.

When you do so, you have to use proper type of protector, capable of passing high frequency signals that are usual for either CAT5 or CAT3 cables.

To give you an example of the proper protector, here is a link to Lucent Technologies website:

Dmitri Abaimov, RCDD

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