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Introduction & design cable pathways
The document discusses various types of cable pathways for data center design including overhead vs underfloor installation. It covers enclosed pathways like conduits and trunkings as well as open pathways such as cable trays, J-hooks, and triangle hooks. The document also provides a case study comparing bus topology vs star topology for cable pathway design and discusses best practices for pathway installation.
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Introduction & design cable pathways
- 1. Click to editMaster title style Click to edit Master text styles Second level Third level Pathways design Fourth level Proprietary & Confidential © 2002 Anixter Inc. Fifth level Jeffrey Lam RCDD 2P0008X0
- 2. Cable pathways Location overhead vsunderfloor Types of pathways Enclosed Conduits and trunkings Open Cable trays / J-hooks & Triangle hooks Design Case study Star vs Bus topology
- 3. Cable pathways Design ofCable pathways Do not overload cable pathways Choose shortest route Avoid split levels consider possible obstructions (beams, ductwork, etc) Allow for spare capacity BIG is good but at expense of asethetics & routing space Provide a concrete kerb for vertical runs Always maintain bend radius Always maintain minimum height.
- 4. Cable pathways Installation ofCable pathways Ground all pathways Maintain electrical continuity Smoothen all cuts and rough edges. Paint over exposed parts with zinc paint esp, for powder coated types Firestop all penetrations across fire compartments Always use custom made parts, not modified ones Never use as a walkway Use cable ties to bundle cable & secure cables onto pathways
- 5. Click to editMaster title style Click to edit Master text styles Type Second level of pathways Third level Fourth level Proprietary & Confidential © 2002 Anixter Inc. Fifth level 2P0008X0
- 6. Supported vs Suspendedsystems Supported Systems Suspended Systems more time consuming to install. faster to install. More material costs Cheaper. More asethetically pleasing Less asethetically pleasing More stress on cables More stress on cables Less potential for growth Less potential for growth Covered solutions •Trunkings / Conduits •J-hooks •Cantenrary Wires Open solutions •Triangle hooks •Cable trays •Cable clips •Cable ladders •Wire baskets
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- 10. Overview of Openpathways solutions Overview of open systems Wire Mesh Cable Tray Ladder Rack Solid Side Cable Tray Center Rail Cable Tray J- Hooks Cable may also be placed in conduit, under raised floors or in trenched floor ducts.
- 11. Solid Side CableTray Maximum Strength Indoor or outdoor use Solid Sides are extruded or roll formed channel Rung, solid or ventilated bottom (rung shown) May be aluminum, steel, stainless steel, fiberglass Fabricated intersections, Commonly used mechanical splices with electrical cables
- 12. Center Rail CableTray Maximum Strength Reduced number of fittings, supports and components versus solid side cable trays. Rungs may exit the bottom or the side of “rail” and the “rail” may double as a tray divider. Combination splice and intersection end hardware.
- 13. Wire Mesh CableTray Medium strength Used for low voltage communications cables (horizontal distribution outside the TR & under raised floors) Made from steel wire welded into a grid work Flexible, field-fabricated intersections
- 14. Ladder Rack (CableRunway) Medium strength Used for low voltage communications cables (overhead/over rack distribution in the ER/TR) Made from tubular or solid steel bar welded into a ladder- like structure Field- and factory-fabricated intersections
- 15. J-Hooks MinimumStrength Used for low voltage communications cables Attach to threaded rod, beams or wires with specialized fasteners Up to 16 each 4-pair UTP cables may be supported in a cable hook that is attached to drop ceiling grid wires
- 16. Typical Cable RunwayInstallation Mounted overhead and attached to racks in the telecommunications closet and equipment room. Ensures that an appropriate cable pathway exists among rack-mounted cross connect equipment. Vertical wall mounting to support backbone cabling.
- 17. Click to editMaster title style Click to edit Master text styles Second levelData Center top Third level or bottom entry Fourth level Proprietary & Confidential © 2002 Anixter Inc. Fifth level 2P0008X0
- 18. Top entry vsbottom entry Overhead vs underfloor asethetics lighting level ease of access for changes cables wastage
- 19. Top entry vsbottom entry Cables, cables everywhere . Look, ma! No trays. Is everything alright??? Clean, and tidy. No hidden spiders
- 20. Top entry vsbottom entry Light is partially blocked Clean & bright Is this patch panel C13 or G18? Great working environment! I cannot see properly.
- 21. Top entry vsbottom entry “wasted cable” “optimal length” requires a vertical pathway no need for a vertical pathway
- 22. Top entry vsbottom entry Which is easier to make moves, adds and changes?
- 23. Top entry vsbottom entry Which is better? How often do I need to make moves, adds & changes? How much cables will I be routing? Will there be a lot of work at the racks? Do I need to save cables? Is there a riser for dropping cables?
- 24. Cable pathways NEMA MetalCable Tray Installation Guidelines download from the website http://www.nema.org/stds/ve2.cfm
- 25. Click to editMaster title style Click to edit Master text styles Pathways Second level Design Third Datacenter level case study Fourth level Proprietary & Confidential © 2002 Anixter Inc. Fifth level 2P0008X0
- 26. FM200 cylinders FM200 cylinders Comms. Comms. Operating Console Operating Console Datacenter Design C C Reserved for future racks Reserved for future racks Route cables from R R Comms riser to A A racks. U U racks racks Each rack requires 4 cables C C racks racks R R 2 designs A A Bus design U U Star design Elect. Elect. UPS UPS UPS UPS UPS UPS UPS UPS Batteries Batteries
- 27. FM200 cylinders FM200 cylinders Comms. Comms. Operating Console Operating Console Bus Design I easy access to Reserved for future racks C C Reserved for future racks main branch. R R A A 32 28 24 20 16 12 32 28 24 20 16 12 8 8 4 4 U more cables at U racks racks start of sub- branch larger sub-branch C C racks main branch racks R R contains cables A A from cables from U U different rows. Elect. Elect. UPS UPS UPS UPS UPS UPS UPS UPS Batteries Batteries
- 28. FM200 cylinders FM200 cylinders Comms. Comms. Operating Console Operating Console Bus Design II Reserved for future racks Reserved for future racks C C less cables in the R R A 4 4 8 12 16 16 12 8 8 12 16 16 12 8 4 4 sub-branch A U U racks racks smaller sub- branch C C racks racks racks pose R R obstruction to A A U U adding cables onto Elect. main branch Elect. UPS UPS UPS UPS UPS UPS UPS UPS Batteries Batteries
- 29. FM200 cylinders FM200 cylinders Comms. Comms. Operating Console Operating Console Bus Design III C C smaller sub- R R A branch A U U no obstruction to main branch main branch still contains cables C C from cables from R R different rows. A A U U Elect. Elect. UPS UPS UPS UPS UPS UPS UPS UPS Batteries Batteries
- 30. FM200 cylinders FM200 cylinders Comms. Comms. Operating Console Operating Console 32 32 Bus Design 96 96 Reserved for future racks Reserved for future racks C C main branch uses R R A different parts from A U U 32 32 branch 64 racks racks 64 32 32 C C 32 32 racks racks R R A A U U Elect. Elect. UPS UPS UPS UPS UPS UPS UPS UPS Batteries Batteries
- 31. FM200 cylinders FM200 cylinders Comms. Comms. Operating Console Operating Console Star Design I 32 32 32 32 no main branch, Reserved for future racks C C Reserved for future racks cables from R R different rows A A U 32 32 32 32 separate. U racks racks Easier identification of 32 cables 32 32 32 C C racks more expensive racks R R uses same items A A U U difficult to route Elect. Elect. UPS UPS UPS UPS UPS UPS UPS UPS cables from one branch to another Batteries Batteries
- 32. FM200 cylinders FM200 cylinders Comms. Comms. Operating Console Operating Console •Star Design II Reserved for future racks Reserved for future racks C C problem solved! R R A A U U but poses a racks racks problem in identifying cables if not C C racks racks properly managed R R A A U U Elect. Elect. UPS UPS UPS UPS UPS UPS UPS UPS Batteries Batteries
- 33. Selecting Cable Runway- Cable Fill Select Cable Runway by Width Cat 5e Cat 6 width to match the type and 4” 316 202 quantity of cable that the cable 5” 395 253 runway must support. 6” 474 303 CPI provides fill tables for 9” 710 455 cable runway that will help 10” 789 505 designers select the correct 12” 947 606 runway size. 15” 1,184 758 18” 1,421 909 20” 1,578 1,010 24” 1,894 1,212 Cat 5e is .220” OD. Cat 6 is .275” OD.
- 34. Selecting Cable Runway– Cable Fill To determine cable fill For Example: without a fill table, divide the • 12” Wide Cable Tray – usable area of cable runway Area = 12” x 6” by the cross-sectional area of Area = 72 sq. in. the cable media and reduce by • .25” Diameter Cable – 50%. Area = 3.1416 x (.125”)2 Area =.049 sq. in. Cable fill must not exceed • Cable Fill Quantity – 6” in depth. Area Tray/Area Cable x 50% (72 sq. in./.049 sq. in.) x .50 735 Cables
- 35. Installation Practices Elevate runway at least 3” above racks or cabinets so that cables can exit properly over a Radius Drop. Support cable runway on the wall, from the ceiling or on the tops of racks and cabinets.
- 36. Installation Practices Supports cable runway every 5’ of span and within 2’ of any splice or intersection. Also, leave 12” of clearance above cable runway to provide easy access to cables.
- 37. Installation Practices If multiple tiers of Cable Runway are installed, leave 12” of clearance in between cable runway for easy access to cables.
- 38. Click to editMaster title style Click to edit Master text styles Pathways Second level Installations Third level best practices Fourth level Proprietary & Confidential © 2002 Anixter Inc. Fifth level 2P0008X0
- 39. Suspended systems J-hooks Triangle hooks Cable clips
- 40. Supported systems -overhead Supported systems - Open systems Wire baskets Cable ladders Cable tray
- 41. Supported systems -overhead Supported systems - covered systems Fiber Ducting Ductings Conduits
- 42. Supported systems -Underfloor Supported systems - Underfloor
- 43. Click to editMaster title style Click to edit Master text styles Second level Third level THANK YOU! Fourth level Proprietary & Confidential © 2002 Anixter Inc. Fifth level Jeffrey Lam RCDD +65 97849870 2P0008X0 Jeffrey.lam@anixter.com