ANSI SCTE 77-2017 pdf free download – Specifications for Underground Enclosure Integrity.
The scope of this document covers conformance tests and requirements for the integrity of grade-level enclosures containing telecommunication or other low voltage apparatus that may be exposed to the public. The purpose of this document is to describe the requirements for a comprehensive integrity system for grade-level enclosures providing long installation life and minimal maintenance. This document is intended to provide guidance for the use of enclosures in non-deliberate traffic areas. Requirements for enclosures in deliberate traffic areas are covered by American Association of State Highway and Transportation Officials (AASHTO).
1.3. Benefits Underground enclosures are designed and used for a variety of applications: slack cable, junction enclosures, and splice enclosures, etc. This document provides the specifier and end user the minimum performance criteria needed to ensure that the enclosure is designed for the outside plant application. Without this document there are no performance requirements for outside plant enclosures, and the long term integrity of the system may be compromised. This document helps specifying individuals design the outside plant and establish enclosure performance requirements throughout the system. The document will serve as a method to ensure long term enclosure integrity as more outside plant systems are installed underground.
1.4. Intended Audience A Standard Engineer or System Designer will be able to use this document to evaluate products from a variety of manufacturers and specify the best product for the application. It is intended to be used by a large cross section of individuals not just those with engineering backgrounds. The test methods and accompanying figures are intended to guide the individual through the process in a logical manner.
1.5. Areas for Further Investigation or to be Added in Future Versions
Areas of future investigation include:
• Adding a section dedicated to installation applications
• Adding a section dedicated to installation details
• Adding a section for hybrid type installations to help others benefit from work being done across the country
2. Normative References The following documents contain provisions, which, through reference in this text, constitute provisions of the standard. At the time of Subcommittee approval, the editions indicated were valid. All standards are subject to revision; and while parties to any agreement based on this standard are encouraged to investigate the possibility of applying the most recent editions of the documents listed below, they are reminded that newer editions of those documents may not be compatible with the referenced version.
2.1. Standards from Other Organizations
1. ASTM D543-14 “Standard Practices for Evaluating the Resistance of Plastics to Chemical Reagents”
2. ASTM D570-98 (2010) “Standard Test Method for Water Absorption of Plastics”
3. ASTM D635-06 “Standard Test Method for Rate of Burning and/or Extent and Time of Burning Plastics in a Horizontal Position”
4. ASTM D2444-99 (2010) “Standard Test Method for Determination of the Impact Resistance of Thermoplastic Pipe and Fittings by Means of a Tup (Falling Weight)”
5. ASTM G154-12 “Standard Practice for Operating Fluorescent Light Apparatus for UV Exposure of Nonmetallic Materials”
6. US Dept. of Agriculture, Rural Utilities Service, 7 CFR 1755.910 “RUS Specification for Outside Plant Housings and Serving Area Interface Systems”
7. ASTM C1028-07 “Standard Test Method for Determining the Static Coefficient of Friction of Ceramic Tile and Other Like Surfaces by the Horizontal Dynamometer Pull-Meter Method”
3. Informative References
The following documents may provide valuable information to the reader but are not required when complying with this standard.
3.1. Published Materials
1. American Association of State Highway and Transportation Officials (AASHTO) “Standard Specification for Highway Bridges” 17 th Edition.
2. National Fire Protection Association (NFPA 70) National Electric Code 2014, Section 314.30
3. Americans with Disabilities Act (ADA) “Accessibility Guidelines for Buildings and Facilities” (ADAAG) and the “Technical Bulletin: Floor and Ground Surfaces”. Both are free from US Government website http://www.access-board.gov/.
4. Torque values for UNC threads taken from Audel Mechanical Trades, 4 th Edition.ANSI SCTE 77 pdf download.