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16 CFR § 1505.7 - Maximum acceptable surface temperatures. 

---
identifier: "/us/cfr/t16/s1505.7"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "16 CFR § 1505.7 - Maximum acceptable surface temperatures."
title_number: 16
title_name: "Commercial Practices"
section_number: "1505.7"
section_name: "Maximum acceptable surface 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: "2026-04-05"
last_updated: "2026-04-05"
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"
---

# 1505.7 Maximum acceptable surface temperatures.

The maximum acceptable surface temperatures for electrically operated toys shall be as follows:

|  |  |  |  |
| --- | --- | --- | --- |
| A | 1 | 50 | 122 |
| A | 2 | 55 | 131 |
| A | 3 | 60 | 140 |
| B | 1 | 55 | 131 |
| B | 2 | 65 | 149 |
| B | 3 | 75 | 167 |
| C (unmarked) | 1 | 65 | 149 |
| C (unmarked) | 2 | 75 | 167 |
| C (unmarked) | 3 | 85 | 185 |
| C (unmarked) | 4 | 95 | 203 |
| C marked | 1 | 70 | 158 |
| C marked | 2 | 90 | 194 |
| C marked | 3 | 110 | 230 |
| C marked | 4 | 130 | 266 |
| D (unmarked) | 1 | 55 | 131 |
| D (unmarked) | 2 | 70 | 158 |
| D (unmarked) | 3 | 80 | 176 |
| D (unmarked) | 4 | 90 | 194 |
| D marked | 1 | 60 | 140 |
| D marked | 2 | 75 | 167 |
| D marked | 3 | 100 | 212 |
| D marked | 4 | 125 | 257 |
| E | () | () | () |
| Thermal inertia types are defined in terms of lambda as follows: |  |  |  |
| Type 1: Greater than 0.0045 (e.g., most metals). |  |  |  |
| Type 2: More than 0.0005 but not more than 0.0045 (e.g., glass). |  |  |  |
| Type 3: More than 0.0001 but not more than 0.0005 (e.g., most plastics). |  |  |  |
| Type 4: 0.0001 or less (e.g., future polymeric materials). |  |  |  |
| The thermal inertia of a material can be obtained by multiplying the thermal conductivity (cal./cm./sec./degrees C.) by the density (gm./cm.) by the specific heat (cal./gm./degrees C.). |  |  |  |
| All types. |  |  |  |
| No limit. |  |  |  |