§ 1505.8 - Maximum acceptable material temperatures.

§ 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):

Material	Degrees C.	Degrees F.
Capacitors	(1)	(1)
Class 105 insulation on windings or relays, solenoids, etc.:
Thermocouple method2	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 method2	100	120	212	248
In totally enclosed motors - thermocouple or resistance method2	105	125	221	257
Insulation on coil windings of d.c. motors and of universal motors:
In open motors:
Thermocouple method2	90	110	194	230
Resistance method	100	120	212	248
In totally enclosed motors:
Thermocouple method2	95	115	203	239
Resistance method	105	125	221	257
Phenolic composition3		150	302
Rubber- or thermoplastic-insulated wires and cords3		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.

Footnotes - 1505.8

^[1] Copies may be obtained from: National Electrical Manufacturers Association, 155 East 44th Street, New York, NY 10017.