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THE DIFFERENCE BETWEEN FUSION SPLICING, PATCH CONNECTIONS
by www.fiber-mart.com
Insertion loss is one of those fiber-optic challenges that follows all network engineers, no matter where they're working. Whenever you have a connection of one fiber to another, you will incur insertion loss. This is the ninth in a fiber-mart.com blog series, entitled The A-B-Cs of Cable Management.Our Product Manager defines insertion loss and demonstrates the difference between loss on patch connections and fiber splices. Insertion loss and light budgets are problems every engineer works with and figures out solutions for. Insertion loss, expressed in decibels (dB), is the loss of signal power resulting from the insertion of a device in a transmission line or optical fiber. The increasing number of fiber connections on hyperscale fiber networks is pushing insertion loss into the priority zone for engineers. More connections mean higher rates of insertion loss, and higher rates of insertion loss mean trouble on your network. And then there's the difference between patch connections and fusion splices. FUSION SPLICING VS. PATCH CONNECTIONSPatch connections will have increased insertion loss. Typically, the loss for a patch connection ranges from 0.05dB to 0.2dB. This may seem like a large amount of signal loss, but patch connections carry the advantage of not being permanent. Technicians can use this advantage for: ServiceTroubleshootingCross-connectionsRedundancyThese are great advantages, even though you have the larger amounts of insertion loss.
Fusion splice
connections offer their own set of advantages. Instead of 0.05dB to 0.2dB of loss with a patch connection, a fusion splice normally incurs only between 0.05dB and 0.1dB of loss. While you have the advantages of less loss with a fusion splice, there is one large drawback. The connection is permanent … well, sort of. Yes, you can cut a splice and re-terminate in the field, but this is much more labor intensive than unplugging even the tiniest LC connector. Splicing has its place, but so does a patch connection. SOLVE THE INSERTION LOSS PUZZLE ON YOUR NETWORKMost modern telecom, enterprise, government or CATV networks have more than just patch and splice terminations to worry about. Our customers deal with passive optical devices that incur insertion loss all over their networks. Telecom engineers worry about devices like splitters, CPRI monitoring and TAPs. CATV engineers face concerns about WDM devices and splitters. These different networks employ devices that have inherent insertion loss. As a technician or an engineer, it is your duty to work with your colleagues and suppliers to develop the loss budgets for your network. There are many ways you can reduce the loss in your network, such as: 1.Cleaning and maintaining your patch connection’s end faces2.Using high-quality passive optical devices that have low insertion loss characteristics3.Implementing ULL connectors that have substantially less theoretical insertion loss characteristics than standard connectors4.Ensuring you are not creating situations where micro bends, micro fractures and macro bends can hurt your signal strength At fiber-mart.com, we pride ourselves in our ability to work with our customers to provide high-quality solutions that will reduce the insertion loss of your network and pad your loss budgets. Our high-quality passive optical devices, cables with ULL connectors and our WaveTrax fiber raceway product line are all methods you can employ to reduce the amount of light loss in your network.
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What Cables Should be Used in Wet Locations?
by www.fiber-mart.com
What are wet, dry and damp location?The definition of a dry location according to the National Electric Code (NEC) is: A location not normally subject to dampness or wetness. A location classified as dry may be temporarily subject to dampness or wetness, as in the case of a building under construction. Based on this definition, standard
Armored Cable
(AC) or Metal-Clad Cable (MC) may be used in locations that may be temporarily exposed to the elements such as rain during construction. Dry locations are not to be confused with damp locations which are protected from the elements and water saturation but may be subjected to moderate amounts of moisture. Some damp locations may include open porches, barns, under canopies, etc. Wet locations occur in areas where direct burial in the ground, in concrete, etc may occur. These are areas where water or other liquid saturation is possible, or in areas that are regularly exposed to the elements. Options for wet and damp location cableMany questions center on what cabling products are approved for wet and damp locations. Type AC cable is approved by the NEC for use only in dry locations. In order to comply with the NEC for use in wet locations, interlocked Type MC Cable must have a corrosion resistant jacket and wet location rated conductors. A common style cable that is rated for wet locations is a standard MC Cable with a PVC jacket. AFC Cable Systems® offers Parking Deck/Lot Cable which is UL® Listed and rated for wet locations per NEC 330. Common applications for this cable include parking garages, direct burial, trenched and back-filled, swimming pools for pool motors and perimeter lighting and terminated in a pole base for parking lots and many more. PVC jacketed cable is also an ideal choice for locations where wiring is subjected to occasional dampness. parking-deck-lot-cable-wet-location An added benefit to PVC jacketed cables is the ability to develop a custom jacket color to blend in with the installation environment. Standard jacket color is gray to coincide with parking garages to minimize visibility of wiring.
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