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If you’re running shielded Ethernet cable outside 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 .
If you are determined to use conduit, IMC metal conduit will be more durable, but costly. IMC metal conduit is used for plumbing and has threads that can be thoroughly sealed. It is wise to pull twine/string through the conduit with the cable and leave it in place to make cable replacements easier. A question that often comes up is “should I use only shielded cable outside”? The short answer is no. The longer answer is “it depends on the environment”. The purpose of cable shielding is to ward off EMI/RFI or ESD. The shielding, usually in the form of foil referred to as FTP (Foil Twisted Pair), will be accompanied by a ESD ground/drain wire as well. Generally, I recommend using unshielded cabling unless there is a valid need for shielded, such as when burying the cable within 8” of electrical wire on parallel runs. The other primary reason to use shielded is for ESD (Electrostatic Discharge) drain off such as when running outdoor Ethernet cable above ground in structure-to-structure scenarios. ESD build up occurs with dry air movement across cabling, and could ruin your network equipment if not allowed to discharge to ground.For installations above ground and between two structures , you will need to use shielded Ethernet cable with a messenger built-in or have a pre-installed messenger. A messenger is a high tensile strength steel wire that has been lashed to two or more points. For more on how to actually install messenger wire cable, or a separate messenger, see Cat6 Shielded Aerial Messenger Cable: Up The Ladder You Go! We recommend to use faceplates with full copper cables as oppose to crimping them for our plates see the QS numbers below: Are you at risk for a lightning strike? Technically speaking, we all are. Just ask the poor golfer who chose to golf at the wrong time…. yikes!
The weatherproof UV Resistant PE sheath allows the cable to be outdoors without eroding over time. Suitable for burying underground mounting to buildings or installing indoors. The 8mm copper cable is more rigid than previous revisions of network cable but easy to install. Its inner film enhances the already weatherproof UV Resistant PE sheath and keeps away any condensation that may build up. Suitable for burying underground mounting to buildings or installing indoors the 7mm copper cable is durable and easy to install delivering gigabit speeds (subject to your network). 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. Our kenable Cat7 S/FTP outdoor cable is designed with FULL COPPER 23AWG twisted pairs and each pair of cores has a foil shield as well as a foil braid inside the sheath to reduce interference and cross talk. This cable is capable of trasfering up to 10 gig at 600Mhz! To make digging a trench more efficient, a trencher machine can be rented from the local equipment rental store. Sure, a shovel can be used but it will result in far more mess, take longer and result in a less consistent trench. In the event operating the trencher is beyond your comfort zone, then hire a local handy person with experience. Eye and ear protection are important. Dealing with Above-Ground Scenarios
The Frequency or MHz indicates how often the signal can pass through the cable. Cat 7 cables have a very high frequency at 600Mhz but Cat 6 only has 250Mhz and Cat5e 100Mhz. Overall a Cat 7 cable will allow more bandwidth at a faster rate than the previous Cat 6 or Cat5e Cables. Our range of Cat7 Cables have a double shielding (S/FTP) to eliminate the chance of cross talk and interference from near by devices. These cables are FULL COPPER which is suitable for POE devices such as Access points WIFI Range extenders CCTV or networking switches that need to carry power via the Ethernet cable to a POE port.
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