16 C.F.R. § 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):

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; Rubber- or thermoplastic-insulated wires and cords 3; Sealing compound; Supporting surface while the toy is operating normally; Wood and other similar combustible material