[Code of Federal Regulations]
[Title 16, Volume 2]
[Revised as of January 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 16CFR1505.7]

[Page 533-534]
 
                     TITLE 16--COMMERCIAL PRACTICES
 
             CHAPTER II--CONSUMER PRODUCT SAFETY COMMISSION
 
PART 1505_REQUIREMENTS FOR ELECTRICALLY OPERATED TOYS OR OTHER 
ELECTRICALLY OPERATED ARTICLES INTENDED FOR USE BY CHILDREN--Table 
 
                          Subpart A_Regulations
 
Sec.  1505.7  Maximum acceptable surface temperatures.

    The maximum acceptable surface temperatures for electrically 
operated toys shall be as follows:

------------------------------------------------------------------------
                                          Thermal       Temperatures
  Surface type (as described--in Sec.  inertia  ---------------------
             1505.6 (g)(2))               type \1\   [deg]C.    [deg]F.
------------------------------------------------------------------------
A......................................          1         50        122
A......................................          2         55        131
A......................................          3         60        140
B......................................          1         55        131
B......................................          2         65        149
B......................................          3         75        167
C (unmarked)...........................          1         65        149
C (unmarked)...........................          2         75        167
C (unmarked)...........................          3         85        185
C (unmarked)...........................          4         95        203
C marked...............................          1         70        158
C marked...............................          2         90        194
C marked...............................          3        110        230
C marked...............................          4        130        266
D (unmarked)...........................          1         55        131
D (unmarked)...........................          2         70        158
D (unmarked)...........................          3         80        176
D (unmarked)...........................          4         90        194
D marked...............................          1         60        140
D marked...............................          2         75        167
D marked...............................          3        100        212
D marked...............................          4        125        257
E......................................      (\2\)      (\3\)      (\3\)
------------------------------------------------------------------------
\1\ Thermal inertia types are defined in terms of lambda as follows:
Type 1: Greater than 0.0045 (e.g., most metals).
Type 2: More than 0.0005 but not more than 0.0045 (e.g., glass).
Type 3: More than 0.0001 but not more than 0.0005 (e.g., most plastics).
Type 4: 0.0001 or less (e.g., future polymeric materials).

[[Page 534]]


The thermal inertia of a material can be obtained by multiplying the
  thermal conductivity (cal./cm./sec./degrees C.) by the density (gm./
  cm.\3\) by the specific heat (cal./gm./degrees C.).
\2\ All types.
\3\ No limit.