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16 CFR § 1505.8 - Maximum acceptable material temperatures. 

---
identifier: "/us/cfr/t16/s1505.8"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "16 CFR § 1505.8 - Maximum acceptable material temperatures."
title_number: 16
title_name: "Commercial Practices"
section_number: "1505.8"
section_name: "Maximum acceptable material temperatures."
chapter_name: "CONSUMER PRODUCT SAFETY COMMISSION"
subchapter_number: "C"
subchapter_name: "FEDERAL HAZARDOUS SUBSTANCES ACT REGULATIONS"
part_number: "1505"
part_name: "REQUIREMENTS FOR ELECTRICALLY OPERATED TOYS OR OTHER ELECTRICALLY OPERATED ARTICLES INTENDED FOR USE BY CHILDREN"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "15 U.S.C. 1261-1262, 2079."
regulatory_source: "38 FR 27032, Sept. 27, 1973, unless otherwise noted."
cfr_part: "1505"
---

# 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 
<sup>1</sup>
[^] published by the National Electrical Manufacturers Association):

<sup>1</sup> Copies may be obtained from: National Electrical Manufacturers Association, 155 East 44th Street, New York, NY 10017.

| Material | Degrees C. | Degrees F. |
| --- | --- | --- |
| Capacitors | () | () |
| Class 105 insulation on windings or relays, solenoids, etc.: |  |  |
| Thermocouple method | 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 | 100 | 120 | 212 | 248 |
| In totally enclosed motors—thermocouple or resistance method | 105 | 125 | 221 | 257 |
| Insulation on coil windings of d.c. motors and of universal motors: |  |  |  |  |
| In open motors: |  |  |  |  |
| Thermocouple method | 90 | 110 | 194 | 230 |
| Resistance method | 100 | 120 | 212 | 248 |
| In totally enclosed motors: |  |  |  |  |
| Thermocouple method | 95 | 115 | 203 | 239 |
| Resistance method | 105 | 125 | 221 | 257 |
| Phenolic composition |  | 150 | 302 |  |
| Rubber- or thermoplastic-insulated wires and cords |  | 60 | 140 |  |
| Sealing compound |  | () | () |  |
| Supporting surface while the toy is operating normally |  | 90 | 194 |  |
| Wood and other similar combustible material |  | 90 | 194 |  |
| 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. |  |  |  |  |
| The temperature indicated refers to the hottest spot on the outside surface of the coil measured by the thermocouple method. |  |  |  |  |
| 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. |  |  |  |  |
| 40 less than melting point. |  |  |  |  |
| 104 less than melting point. |  |  |  |  |