The maximum acceptable material temperatures for electrically operated toys shall be as follows (Classes 105, 130, A, and B are from ``Motors and Generators,'' Standard MG-1-1967 \1\ published by the National Electrical Manufacturers Association):---------------------------------------------------------------------------
\1\ Copies may be obtained from: National Electrical Manufacturers Association, 155 East 44th Street, New York, NY 10017. ------------------------------------------------------------------------
Material Degrees C. Degrees F.------------------------------------------------------------------------Capacitors.................................... (\1\) (\1\)Class 105 insulation on windings or relays,
solenoids, etc.:
Thermocouple method \2\..................... 90 194
Resistance method........................... 110 230Class 130 insulation system................... 110 230Insulation:
Varnished-cloth insulation.................. 85 185
Fiber used as electrical insulation......... 90 194------------------------------------------------------------------------ ----------------------------------------------------------------------------------------------------------------
Class A Class B Class A Class B----------------------------------------------------------------------------------------------------------------Insulation on coil windings of a.c. motors (not including universal
motors) and on vibrator coils:
In open motors and on vibrator coils--thermocouple or resistance 100 120 212 248
method \2\.......................................................
In totally enclosed motors--thermocouple or resistance method \2\. 105 125 221 257Insulation on coil windings of d.c. motors and of universal motors:
In open motors:
Thermocouple method \2\......................................... 90 110 194 230
Resistance method............................................... 100 120 212 248
In totally enclosed motors:
Thermocouple method \2\......................................... 95 115 203 239
Resistance method............................................... 105 125 221 257Phenolic composition \3\............................................ ......... 150 302 .........Rubber- or thermoplastic-insulated wires and cords \3\.............. ......... 60 140 .........Sealing compound.................................................... ......... (\4\) (\5\) .........Supporting surface while the toy is operating normally.............. ......... 90 194 .........Wood and other similar combustible material......................... ......... 90 194 .........----------------------------------------------------------------------------------------------------------------\1\ If the capacitor has no marked temperature limit, the maximum acceptable temperature will be assumed to be
65 [deg]C. (149 [deg]F.) for an electrolytic type and 90 [deg]C. (194 [deg]F.) for other than an electrolytic
type.\2\ The temperature indicated refers to the hottest spot on the outside surface of the coil measured by the
thermocouple method.\3\ The limitations on rubber- and thermoplastic-insulated wires and cords and on phenolic composition do not
apply if the insulation or the phenolic has been investigated and found to have special heat-resistant
properties, or if the insulation meets the thermal requirements.\4\ 40 less than melting point.\5\ 104 less than melting point.