Brian TeagueBusiness Development Mgr

June 2013

Outside Plant Connectivity

OSP Connectivity

Apple Data Center Maiden, NC

Burial Installation of Fiber Cable

The blue boxes are tips for a safe and successful installation

Underground Enclosure Standards

National Electric Code 314.30

Enclosures should be designed and installed to withstand all loads likely imposed

• Enclosure size • Enclosures without bottoms

• Bonding requirements • Wiring and cable entries

ANSI/SCTE 77 2010

Three position load testing to simulate actual application

• UV degradation per ASTM G-154 • Fire resistance per RUS 7CFR 1755.910 (PE-91)

• Chemical resistance per ASTM D543 • Water absorption per ASTM D-570

• Impact resistance per ASTM D-2444 • Accelerated services per ASTM D-756

Order enclosures large enough to handle the cable’s bend radius Lay cable out in a figure 8 pattern for pulling Understand the traffic patterns where the enclosure will be placed

ANSI/SCTE 77 2010 Testing Explanation

Load Rating Requirements:• ANSI tier application relates to the nominal design load

times 1,000 lbs• ANSI tier loadings use a 50% grater value for the test

loads • The maximum deflection for indicated design load is 0.5”

for vertical tests• The maximum deflection for indicated design load is

0.25” per foot of length for lateral tests

Deflection and Corrosion Examples

ANSI/SCTE 77 2010 Tier Ratings Explanation

Tier Application Load Requirements

TIER 5 Sidewalk applications with a safety factor for occasional non-deliberate vehicular traffic

Vertical Design 5,000 lbsTest 7,500 lbs

Lateral Design 600 lbs/sqftTest 900 lbs/sqft

TIER 8 Sidewalk applications with a safety factor for occasional non-deliberate vehicular traffic

Vertical Design 8,000 lbsTest 12,000 lbs

Lateral Design 600 lbs/sqftTest 900 lbs/sqft

TIER 15 Driveways, parking lots and off roadway applications subject to occasional non-deliberate heavy vehicular traffic

Vertical Design 15,000 lbsTest 22,500 lbs

Lateral Design 800 lbs/sqftTest 1,200 lbs/sqft

TIER 22 Driveways, parking lots and off roadway applications subject to occasional non-deliberate heavy vehicular traffic

Vertical Design 22,500 lbsTest 37,750 lbs

Lateral Design 800 lbs/sqftTest 1,200 lbs/sqft

AASHTO H-20 Deliberate vehicular traffic applications. Certified precast concrete, cast iron or other AASHTO recognized materials

Non Deliberate Traffic Examples

Tier 8

Tier 15 or 22

Trash Receptacle Single Lane Alley Way Dual Lane Alley Way

Polymer concrete weighs less and is stronger than concrete When in doubt of future traffic patterns, specify higher tier ratings for better protection

Divided Highway Parking Lot Sideway and Grassy Areas

Tier 8

Tier 15 or 22

More Non Deliberate Traffic Examples

Do not lose the cover bolts Make sure cover bolts are screwed in securely to avoid potential trip hazard Auger bolts are easier to install than standard bolts

Buried Cable Duct

ASTM F2160 -10 Specification for Solid Wall HDPE Conduit on Controlled OD

Advantages of PE:• Ductility – better resistance to brittleness from age and cold • Low temp impact resistance• Permanent flexibility• Temperature versatility – install from -30⁰C to +180 ⁰C

Do not exceed 70% fill of duct Never exceed the cable’s bend radius when looping slack cable

Aerial Drop Cables

Tail WireWedge

Shell

Traditional Drop Wire Clamp Assembly

All Dielectric Fiber Drop Wire Clamp Assembly

Cable grip channel Single unit housing and tailTail Wire

Traditional Coax Drop Clamp Assembly

Telcordia GR-3174-CORE Summary

Tail Wire Summary:• Tail must be clean, smooth and without visible evidence of scale or rust• Splints, kinks, pits and gouges that can reduce strength, reliability or ease of handing are unacceptable• Tensile elongation at the break of steel tail wires may not be less than 15%

Wedge Assembly Summary:• Steel tail wire to bridge assembly has to withstand a 555 lb load without pulling out of stamping • The bridges in the wedge assembly that secure the tail cannot make contact with the cable

Clamp Assembly Summary:• The edges of the clamps cannot have burrs with a smooth cut which does not interfere with the seating of

the wedge assembly • The clamps have to be clean and free of corrosion• Tail and bridge components cannot interfere with the seating of the cable

Specify drop clamp made specifically for the cable construction deployed Deformation of clamp during failure could destroy expensive cable assemblies Route drop lines to avoid potential contact of energized cabling

Final Thoughts for Ensuring A Successful Install

Understand the local codes and regulations before you start Only specify products that comply or exceed industry standards Require suppliers to provide test reports to verify product performance

Brian TeagueOffice: +1.803.216.2640 direct

dbteague@hubbell.com

He who buys cheap will end up paying twice! (Hungarian Proverb)