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network cable Cat5 FTP ,PE – Outdoor
Depending on the environment, it may make more sense to bury the outdoor Ethernet cable as opposed to open air runs. Whether open-air or buried into the ground, the selection of Ethernet cable is crucial. First, CMX rated Ethernet cable is the only appropriate cable to use outdoors. Life, not being that simple, means there are various types of CMX rated Ethernet cable. The only commonality between them is they have a UV resistant outer cable jacket, coated with PVC (Polyvinyl Chloride) or the superior LLDPE (Linear Low Density Polyethylene). Regular Ethernet cable meant for indoor use will quickly degrade in the sun, wind, rain and temperature swings.
network cable Cat5 FTP ,PE – Outdoor
- According to the NEC (National Electric Code) section 800.113, since CMX Ethernet cable is not fire rated it must not run indoors more than 50 feet before termination in any commercial structure. For residential single family and duplex dwellings, CMX Ethernet cable is permitted to be used as indoor/outdoor cable without restriction with the caveat that it cannot exceed 0.25” thickness (OD or outer diameter).
- If you have an underground rodent problem in your area (moles) your buried Ethernet cable is at risk. It is advisable to use conduit in this circumstance, and preferably metal conduit. The costs are higher, but the benefit is the conduit need not be buried as deeply.
- If running a CMX shielded cable between two buildings (buried or not), it is very important to avoid what is known as a ground loop. This situation arises when the building electrical mains have different ground potentials. This can result in voltage injection through the cable if the cable is running to ground at both ends through the different AC grounds. Mitigation strategies can be found in How to Fix a Ground Loop.
- Can CMX cable be run in the air between two poles or structures? Absolutely, CMX cable is meant to withstand outdoor conditions but a “messenger” must be used. A messenger is a thin high strength wire. The best way is to buy outdoor CMX above-ground shielded cable where the messenger is already built-in. If using a CMX cable without a built-in messenger there is a work around. Run thin stainless-steel wire between two sturdy attachment points and attach the Ethernet cable to the messenger. When running cable in this fashion, support the Ethernet cable along the entire length with zip ties every few feet as high wind speeds or freezing rain can do terrible things to cabling.
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