I am looking for the original source study that was used to develop the second 
level power faults in GR-1089-CORE.  In other words, where did the test levels 
come from.  Was it UL or Bellcore or possibly AT&T prior to the breakup.  
Specifically I am trying to find out why test 4 in Table 4-8 is
limited to 2.2 amps.  Why not 3, 4, 5, 6 amps for 15 minutes.
 
I am also looking for a time-current plot or data for 26 gauge cable.  Figure 
4-5 in GR-1089-CORE is supposed to be similar to 32 gauge tinsel cord and 
mimics the Bussman fuse upper limit, however I am looking to find where 26 
gauge cable would fall on this plot.
 
Any help would be appreciated.

Jim 

Jim Wiese 
NEBS Project Manager/Senior Compliance Engineer 
ADTRAN, INC. 
901 Explorer Blvd. 
P.O. Box 140000 
Huntsville, AL 35814-4000 
256-963-8431 
256-963-8250 fax 
jim.wi...@adtran.com 

 

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