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

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

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

AGAIN CABLE MUST (BOTH COPPER & FIBRE) 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)

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

WHAT NOT TO DO

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

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

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

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

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

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

CABLE LADDER GALVANISED STEEL OR PVC CABLE SECURED AT RUNGS

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

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

SNAKE TRAY SIMILAR TO CABLE BASKET FLEXIBLE EASIER TO INSTALL?

FLEXIBLE

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

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

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

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

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

TRUNKING MORE DIFFICULT TO CUT (LID) NEATER

RACEWAYS SIMILAR TO TRUNKING VISUALLY PLEASING EASILY MODIFIED

POWER AND DATA CABLING

POWER AND DATA SEPARATION

MIN BEND RADIUS

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

CABLE TRAY ASSEMBLIES

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

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

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

EN 50174 MAKES THE FOLLOWING RECOMMENDATIONS

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

EMI PERFORMANCE DIFFERS WITH THE DIFFERENT TRAY TYPES

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

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