U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 30Chapter IPart 18Subpart B - Subpart B—Construction and Design Requirements
View all text of Subpart B [§ 18.20 - § 18.54]
§ 18.23 - Limitation of external surface temperatures.

The temperature of the external surfaces of mechanical or electrical components shall not exceed 150 °C. (302 °F.) under normal operating conditions.

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