1505.8—Maximum acceptable material temperatures.

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):

Code of Federal Regulations


Footnote(s): 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 110 230
Class 130 insulation system 110 230
Insulation:
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 method 2 100 120 212 248
In totally enclosed motors—thermocouple or resistance method 2 105 125 221 257
Insulation 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 105 125 221 257
Phenolic 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 °C. (149 °F.) for an electrolytic type and 90 °C. (194 °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.