[Code of Federal Regulations]
[Title 30, Volume 1]
[Revised as of July 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 30CFR7.46]

[Page 21]
 
                       TITLE 30--MINERAL RESOURCES
 
  CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
 
PART 7--TESTING BY APPLICANT OR THIRD PARTY--Table of Contents
 
                      Subpart C--Battery Assemblies
 
Sec. 7.46  Impact test.

    (a) Test procedures. (1) Prepare four covers for testing by 
conditioning two covers at -13  deg.F (-25  deg.C) and two covers at 122 
 deg.F (50  deg.C) for a period of 48 hours.
    (2) Mount the covers on a battery box of the same design with which 
the covers are to be approved, including any support blocks, with the 
battery cells completely assembled. If used, support blocks must contact 
only the filler material or partitions between the individual cells. At 
the test temperature range of 65  deg.F -80  deg.F (18.3  deg.C-26.7 
deg.C), apply a dynamic force of 200 ft. lbs. to the following areas 
using a hemispherical weight with a 6 maximum radius:
    (i) The center of the two largest unsupported areas;
    (ii) The areas above at least two support blocks, if used;
    (iii) The areas above at least two intercell connectors, one cell, 
and one filler cap; and
    (iv) Areas on at least two corners. If the design consists of both 
inside and outside corners, test one of each.
    (3) Record the condition of the covers, supports, intercell 
connectors, filler caps, cell covers, and filler material.
    (b) Acceptable performance. Impact tests of any of the four covers 
shall not result in any of the following:
    (1) Bent intercell connectors.
    (2) Cracked or broken filler caps, except plastic tabs which extend 
from the body of the filler caps.
    (3) Cracks in the cell cover, cells, or filler material.
    (4) Cracked or bent supports.
    (5) Cracked or splintered battery covers.

[53 FR 23500, June 22, 1988, as amended at 60 FR 33723, June 29, 1995]