Comment on FR Doc # E7-17194

Document ID: RUS-07-ELECTRIC-0009-0004
Document Type: Public Submission
Agency: Rural Utilities Service
Received Date: September 26 2007, at 02:23 PM Eastern Daylight Time
Date Posted: November 13 2007, at 12:00 AM Eastern Standard Time
Comment Start Date: August 30 2007, at 12:00 AM Eastern Standard Time
Comment Due Date: October 29 2007, at 11:59 PM Eastern Standard Time
Tracking Number: 802a1602
View Document:  View as format xml

This is comment on Proposed Rule

Specifications for Primary Underground Power Cable

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3b. Availability of publications Add: (3) Copies of the Insulated Cable Engineering Association (ICEA) publications referenced in this specification can be obtained form HIS for a fee at the address indicated below: IHS 15 Invernes Way East Englewood, CO 80112 Telephone: 800-854-7179 Web Site: http://www.globe.ihs.com 4c Central aluminum phase conductors shall be one on the following: (3) - This part should be changed to 4d which would require the conductor to be filled whether copper or aluminum. The requirement to fill the conductor interstices so as not to allow moisture to migrate through the conductor should be for both aluminum and copper conductor and not just for aluminum conductor. Filling the strands of a conductor is done to pick moisture out of the conductor and whereby limiting the moisture that can migrate into the insulation. 4c (4) ? Remove requirement for indent printing on a solid conductor. Requiring indent print on solid conductors does seem consistent with keeping the interface of the conductor and extruded components smooth. Using indent on a solid conductor will cause the surface of the conductor have some metal displacement and create irregularities on the conductor surface. Indent printing on the center strand of a stranded conductor is being used today on cables and this type of identification should be limited to stranded conductor and not used on solid conductor use for medium voltage cables. 7c ? The requirement of stripping tension for TR-XLPE cable should be changed to the industry standard of a maximum of 24 lb. Limiting the maximum stripping tension to 18 lb will cause quality cable to be rejected based on a difference of 6 lb. The industry standards require that the cables be able to be stripped at temperatures between -10C and 40C with out tearing based on a defined test procedure regardless of the actual stripping tension. 10. Dimensional Tolerances Remove this section since diameter tables referred to in this specification do not have nominal diameters. The ICEA diameter tables now state minimum and maximum diameters, therefore this statement in 10. is no longer needed or relevant. 11 b Partial Discharge Tests: Changed wording to: Discharge Tests: Manufacturers shall demonstrate that their cable meets either the partial discharge test for Discharge Free cable design or the Discharge Resistance test for Discharge Resistant cable designs as required per ICEA S-94- 649 and as described in b(1) or b(2) of this bulletin. 11 c (1) Jacket tests This requirement should be omitted. Since polyethylene?s (low, medium and high density) have excellent cold temperature properties, there is no need to do cold bend test. ICEA standards do not require a cold bend test for these jacket materials for the reason stated above. Jacket materials such as Polyvinyl Chloride (PVC) and Chlorinated Polyethylene (CPE) do require a cold bend test but are not allowed to be used in this specification.

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