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**\*\*\* DRAFT \*\*\***

**Date:** 4/26/99**\
Rev Date:** 7/13/99**\
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Project:** BTev General Support**\
Doc. No:** Hance-H990426B**\
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Subject:** Standards for Cables Used in the BTeV Project\
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**Conductor** sizes, overcurrent protection and insulation rating shall
be chosen in accordance with the document \"Electrical Design Standards
for Electronics to be Used in Experiment Apparatus at Fermilab\". That
document and the most recent version of this document is available on
the BTeV web site.

**Cable** **types** must be chosen with regard to fire safety (flame
propagation and smoke characteristics). Cable **must** be rated to a
recognized standard that shows they are self-extinguishing and will not
spread a fire. Cables with low smoke density, toxicity, and corrosivity
of gasses are **preferred**. Smoke produced by overheated halogenated
cable insulation is corrosive to electronics and fatal to the exposed
components of the silicon detector. Whenever possible, cable should be
specified as halogen free.

The following information was gleaned from the National Electrical Code
Article 725 and other sources. Check the most recent version of this
document. New types will be added as they are identified and evaluated.
The Electronics Certification Board (ECB) may grant exceptions on a
case-by-case basis. When choosing a cable for an application listed in
the \"Application\" column, try to choose one of the NEC cable types or
permitted substitutions; or UL, IEC, or CSA Fire rating from the same
row.

Table of Cable Types and Substitutions

  ------------- ------------- -------- --------------- ----------- ---------- ----------
  Application   Description   NEC      Permitted       UL Fire     IEC Fire   CSA Fire
                              Cable    Substitution    Rating\*    Rating\*   Rating\*
                              Types                                           

  Air ducts     Plenum        CL2P     CMP, CL3P       UL 910\     N/a        FT6
                                                       (smoke and             
                                                       flame)                 

  Vertical      Riser         CL2R     CMP, CL3P,      UL 1666\    N/a        
  shafts                               CL2P, CMR, CL3R (Vertical              
                                                       riser)                 

  Areas other   General       CL2      CMP, CL3P,      UL 1581     IEC 332-3  FT4
  than risers   Purpose                CL2P, CMR,      IEEE 383               
  or plenums                           CL3R, CL2R,     (Vertical              
                                       CMG, CM, PLTC,  tray)                  
                                       CL3, TC                                

  Enclosed in   General       CL2X     CMP, CL3P,      UL 1581     IEC 332-1  
  conduit, up   Purpose -              CL2P, CMR,      VW-1                   
  to 10 feet    Limited Use            CL3R, CL2R,                            
  exposed                              CMG, CM, PLTC,                         
                                       CL3, CL2, CMX,                         
                                       CL3X, TC                               
  ------------- ------------- -------- --------------- ----------- ---------- ----------

\* Note, The IEC and CSA Fire ratings are not necessarily represented
here as equivalent to the UL Fire Ratings. The UL (US) standards are
more comprehensive and stringent than their international counterparts
with regard to flammability. However, the international ratings may be
substituted as shown. The international ratings do imply additional
safety and materials requirements.