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The maximum horizontal distance shall be 76 meters (250 feet). For ease of cable installation and future expansion in hallway or major distribution routes, cable trays are the preferred method for distributing the horizontal wiring from the telecommunications room to the communication outlets.
What is the maximum allowable distance for a horizontal cable?
D. Horizontal cabling shall contain no consolidation points, splice points, or transition points between the Telecommunications Room and the Work Area Outlet. E. The maximum allowable horizontal cable length is 295 feet.
When planning horizontal cabling What is the maximum allowable distance that twisted-pair can be used?
When planning horizontal cabling, what is the maximum allowable distance that can be used? In general, how much can a twisted-pair’s cable be bent before data transmission may be impeded? No more than four times the diameter of the cable.
How far away should the cable be from fluorescent lighting?
Stay at least 3 feet away from fluorescent light boxes and other sources of electrical interference. If it is necessary to run cable across the floor, cover the cable with cable protectors. Label both ends of each cable. Use cable ties (not tape) to keep cables in the same location together.
What a cable bend radius determines?
A cable bend radius determines the total number of bends that can exist in an overall cable before data is impaired.
What are 3 acceptable ways to support cable runs?
Typical cable-support systems include cable trays, ladder racks, enclosed wire pathways, clamps, rings, and fasteners.
What is the maximum fill capacity of cable trays when used for horizontal distribution in structured cabling systems?
Cable trays shall be designed to accommodate a maximum calculated fill ratio of 40% to a maximum of 6 inches inside depth, to allow for future cable installations.
What are the requirements for wall jacks under TIA EIA standards?
The TIA/EIA standard for wall jacks in a work area require that at least one outlet be provided for data and one for voice. Cable that is coated with flame-resistant polyvinyl chloride (PVC) is acceptable for use in plenum areas.
When terminating an Ethernet cable about how far should the cable sheath extend into the plug group of answer choices?
The idea is to get the cable jacket up into the rear of the plug as far as possible and to not have kinked up conductors inside the plug. Standard depth termination. This is at the 1/2” maximum untwist allowable per ANSI/TIA 568 2.
What is the maximum supported throughput of a Cat6 cable group of answer choices?
The maximum supported throughput of a Cat6 cable is 10Gbps.
How much separation should there be between fluorescent lighting and telecommunications wiring?
When routing cabling in the vicinity of fluorescent lighting, a minimum separation distance of 2 in (50 mm) should always be maintained.
What is not a TIA EIA recognize cabling type that can be used for horizontal cabling?
Which of the following cabling types is not recognized by the TIA/EIA for horizontal wiring? TIA/EIA recognizes UTP, STP, and Fiber-optics, they do not recognize coaxial.
What is the maximum frame size for Ethernet II frames on a VLAN?
The IEEE 802.3ac standard increased the maximum Ethernet frame size from 1518 bytes to 1522 bytes to accommodate the four-byte VLAN tag.
What is the maximum bending radius of a cable?
Cable Multipliers Cable Type Minimum Bend Radius as a Multiple of Overall Cable Diameter Single or multiple-conductor cables without metallic shielding, >1,000 V Eight times the overall cable diameter Single-conductor cables with shielding, >1,000 V 12 times the overall cable diameter.
What is the minimum and maximum radius of fiber cable?
The optical minimum bend radius is equal to ten times the outer jacket diameter of that cable. So if you’re dealing with a fiber cable that has a 2mm outer jacket, then 2mm x 10 = 20mm bend radius.
What is the minimum radius allowed along the inner edge of a bent cable?
According to NEC Article 320.24, for AC cable, the radius of the curve of the inner edge of any bend shall not be less than 5 times the diameter of the cable.
How far apart should the supports be for cable tray?
Cable tray permits much greater spacing between support hangers than for most other systems, providing savings in support costs and installation labor. Square D cable trays are available for support spacings ranging from 8 to 20 foot support spans.
What is the maximum distance between supports for non metallic sheathed cable?
NM-cable must be secured and supported every 4.5-feet (1.4-meters) by staples, listed cable ties, straps, hangers or similar fittings, or other similar fittings that are designed and installed so that they do not damage the cable.
How far apart should cable tray be supported?
A: According to The Cable Tray Institute, an association of companies involved in the development of cable-tray systems, 9 inches is the most common rung spacing for ladder cable tray, which may be used to support all sizes of cables.
What is the minimum calculated fill ratio that is allowed in the cable tray?
The US National Electric Code (NEC) and the Telecommunications Industry Association (TIA) recommend that cable trays are not filled more than 50%, based on cross-sectional area. Due to the voids between cables and their random placement within the tray, the tray will be effectively full at the 50% fill rate.
How many bends can you have in electrical conduit?
National Electrical Code or NEC limits the total number of bends in one continuous run to 360 degrees or four 90 degree bends. It specifically states, “There shall not be more than the equivalent of four quarter bends (360 degrees total) between pull points, for example, conduit bodies and boxes.”.
How is cable tray fill calculated?
The sum of the cross sectional areas of all cables cannot exceed 50% of the trays fill area. The cable tray sizing equals the width times the loading depth.Wire Basket Cable Tray Fill Calculator – Cable Tray Sizing Calculator. Tray Size # of 0.1852″ O.D. Cables # of 0.21″ O.D. Cables 2″ x 4″ 148 115 2″ x 6″ 222 173.
What is the distance limitation of a Category 5 horizontal cross connect cable?
These share many of the same physical characteristics including distance limitations, but Cat5e is designed for faster networking speeds and reduced crosstalk interference. The maximum length you can run Cat5, Cat5e, Cat6 and Cat6a cable is 100 meters or 328 feet.
What is the maximum number of cable subsystems permitted in a structured cabling system?
Generally speaking, there are six subsystems of a structured cabling system.
How far should you twist or untwist the pairs in Cat5e cable to terminate the ends?
Preserve the wire pair twists as close as possible to the point of termination. When connecting jacks and plugs, do not untwist the cable more than 0.5 inches for Cat5e, Cat6, and Cat6a cable. (FYI: A half of an inch of an untwisted wire pair results in 1.5 dB of near-end crosstalk.).
What is the difference between CAT 5 and CAT6?
Compared to Cat5/5e cables, Cat6 cables have stricter performance specifications and significant higher data transfer speeds at greater distances. They are more tightly wound than Cat5 cables, and the cable conductors and cable sheath are thicker as well.
When terminating an Ethernet cable about how far should the cable?
Be sure to include an extra 2 inches on either end of the wire for the data plug. NOTE: Network cables have a maximum length, depending on which type is being used. Although maximum length varies by manufacturer, a common rule of thumb is 650 feet for a CAT6 cable and 250 feet for a CAT5e cable.
What is more common 568A or 568B?
The 568A wiring pattern is recognised as the preferred wiring scheme for standard use because it provides backward compatibility for both one pair and two pair Universal Service Order codes (AT&T) USOC wiring. However, N-Tron adopted the 568B standard since it is the most widely used in the industry today.
