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Cable Management

Cable Management. DATA CABLE IS SUSCEPTIBLE TO DAMAGE INSTALLING CAT5 CABLE DOES NOT GUARANTEE CAT5 PERFORMANCE HOW CABLE IS INSTALLED, NOT ONLY WHAT TYPE OF CABLE IS INSTALLED. IF CABLE NOT INSTALLED PROPERLY PROBLEMS WITH ATTENUATION NEXT PS NEXT FEXT PS FEXT.

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Cable Management

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  1. Cable Management

  2. DATA CABLE IS SUSCEPTIBLE TO DAMAGE • INSTALLING CAT5 CABLE DOES NOT GUARANTEE CAT5 PERFORMANCE • HOW CABLE IS INSTALLED, NOT ONLY WHAT TYPE OF CABLE IS INSTALLED

  3. IF CABLE NOT INSTALLED PROPERLY PROBLEMS WITH • ATTENUATION • NEXT • PS NEXT • FEXT • PS FEXT

  4. ANSI/TIA/EIA-568-A 10.6.3.2 SPECIFIES • APPROPRIATE CABLE MANAGEMENT MUST BE USED TO ELIMINATE • CABLE STRESS • UNTWISTING OF PAIRS • CABLE CINCHING • TWISTING OF CABLE • CABLE MUST ALSO BE INSTALLED TO MANUFACTURES SPECIFICATIONS

  5. SURFACE RACEWAY • COVERED BY EIA/TIA-569 SECT.4.7 • LISTED IN FOUR (4) SUBGROUPS : • SURFACE RACEWAY • RECESSED RACEWAY • MOLDING RACEWAY • MULTICHANNEL RACEWAY

  6. AGAIN CABLE MUST • NOT BE PUT UNDER STRAIN • MAINTAIN A MINIMUM BEND RADIUS • BE SUPPORTED (REGARDLESS OF TYPE) • BE IN A SUITABLE ENVIRONMENT • PROTECTED FROM EMI (e.g. RFI) (COPPER ONLY) (BOTH COPPER & FIBRE)

  7. DON’TS • NEVER PULL CABLE DIRECTLY ACROSS SUSPENDED CEILING TILE OR ACROSS FLORESCENT LIGHT BOXES (EMI) • CABLE SHOULD NOT BE TIED TO CEILING GRIDWORK WIRES

  8. WHAT NOT TO DO

  9. THERE ARE VARIOUS DIFFERENT TYPES OF CABLE MANAGEMENT EACH GIVING DIFFERENT DEGREES AND TYPES OF PROTECTION MANAGEMENT TYPES

  10. CABLE TIES • USED TO SECURE CABLE TO TRAYS, TRUNKING ETC. • NYLON, POLYPROPYLENE • RELEASABLE, NON-RELEASABLE • RIBBED INNER SURFACE TO SECURE CABLE

  11. “J” HOOK BENEFITS • DESIGNED FOR “HIGH PERFORMANCE” CABLE • USED SPARINGLY OVER SHORT RUNS • LIMITS THE NEED FOR CABLE TIES

  12. “J” HOOKS SHOULD NOT BE USED AS A REPLACEMENT FOR CABLE TRAY

  13. D-RINGS • AS WITH J-HOOKS • FOR SMALL BUNDLES OF CABLE • USED SPARINGLY OVER SHORT RUNS

  14. THE J-HOOKS ARE NOT ADEQUATE SUPPORT HERE • THE CABLE IS UNDER STRESS AT POINTS A & B  A  B

  15. CABLE LADDER • GALVANISED STEEL OR PVC • CABLE SECURED AT RUNGS

  16. CABLE LADDER • WITH LARGE BUNDLES CABLE UNDER PRESSURE AT RUNGS BECAUSE ITS WEIGHT IS NOT DISTRIBUTED ALONG A RUN

  17. CABLE BASKETS AS WITH CABLE LADDERS CABLE WEIGHT NOT EVENLY DISTRIBUTED. BASKET IS CHEAPER AND EASIER TO INSTALL THAN LADDER

  18. SNAKE TRAY • SIMILAR TO CABLE BASKET • FLEXIBLE • EASIER TO INSTALL?

  19. FLEXIBLE

  20. CABLE TRAYS • GALVANISED STEEL OR PVC • VARIOUS DIMENSIONS • MAY BE RESIZED WITH HACKSAW • ANGULAR INSERTS AVAILABLE

  21. CABLE TRAYS • PERFORATED BOTTOM • HORIZONTAL & BACKBONE • FLEXIBLE • EASY ACCESS TO CABLE • CURVED TRAYS • SUPPORTS WEIGHT OF CABLE ALONG WHOLE RUN

  22. CONDUIT • COMPLETELY ENCLOSED • NO REMOVABLE LID • GALVANISED STEEL PVC • ACCESS TO CABLE LIMITED

  23. CONDUIT • EMI PROTECTION • OUTLET DENSITIES LOW • MEDIUM TO LONG TERM • NEAT & AESTHETIC

  24. TRUNKING • SIMILAR TO CABLE TRAY BUT • REMOVABLE LID (BETTER PROTECTION) (EMI & RODENT)

  25. TRUNKING • MORE DIFFICULT TO CUT (LID) • NEATER

  26. RACEWAYS • SIMILAR TO TRUNKING • VISUALLY PLEASING • EASILY MODIFIED

  27. POWER AND DATA CABLING

  28. POWER AND DATA SEPARATION

  29. MIN BEND RADIUS

  30. DROPOUT PIECE ENSURES MIN BEND RADIUS IS MAINTAINED • PRESSURE AT RUNG A IS ALLEVIATED  A

  31. CABLE TRAY ASSEMBLIES

  32. What is EMI? • ELECTRO MAGNETIC INTERFERENCE • DESCRIBES ALL KINDS OF ELECTRICAL AND MAGNETIC INTERFERENCE • EMI IS A FIELD THAT EMANATES FROM ‘LIVE’ CONDUCTORS • CAN TRAVEL LARGE DISTANCES AND INTERFERE WITH OTHER CONDUCTORS • RFI (RADIO FREQUENCY INTERFERENCE) • 98FM CAN INTERFERE WITH CONDUCTORS

  33. Sources of EMI • SOME ‘LIVE’ CONDUCTORS CAN CAUSE MORE INTERFERENCE THAN OTHERS • DEPENDS ON SEVERAL FACTORS, SUCH AS THE AMOUNT OF CURRENT THEY ARE CARRYING AND THE AMOUNT OF SCREENING AROUND THE CONDUCTOR • FLUORESCENT LIGHTING, SUBSTATIONS, MOTORS, SWITCH MODE POWER SUPPLIES

  34. Vulnerability • SOME CONDUCTORS CAN PICK UP INTERFERENCE MORE EASILY THAN OTHERS • UTP IS PARTICULARLY VULNERABLE TO PICKING UP EMI • SCREENED CONDUCTORS OR CONDUCTORS IN EARTHED ENCLOSURES ARE LESS VULNERABLE BUT HAVE TO BE CAREFUL • FIBRE IS IMMUNE TO EMI

  35. EN 50174 • MAKES THE FOLLOWING RECOMMENDATIONS

  36. En 50174 • EUROPEAN STANDARD SUBMITTED TO CENELEC • THREE PARTS • SPECIFICATION • IMPLEMENTATION • OPERATIONS } OF INFORMATION TECHNOLOGY CABLING, BOTH COPPER & FIBRE

  37. EMI PERFORMANCE DIFFERS WITH THE DIFFERENT TRAY TYPES

  38. THE BUNDLE HEIGHT INTO THE CABLE TRAY SHALL BE LOWER THAN THE SIDE WALLS AS ILLUSTRATED ABOVE • OVERLAPPING LIDS PROVIDE MORE PROTECTION • DEEP CONDUITS ARE PREFERRED

  39. CABLE SUPPORT • PROPER CAT 5 PERFORMANCE WILL ONLY BE ACHIEVED WITH CAREFUL CABLE INSTALLATION AND ADEQUATE SUPPORT • MAKE SURE “YOUR” INSTALLATIONS ARE NOT PART OF THE 80 % THAT WILL NOT SUPPORT TRANSMISSION IN THE FUTURE OF 100 Mbps AND BEYOND

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