Thermal Protection of Fixed Electric Heating Equipment

External surfaces of pipeline and vessel heating equipment that operate at temperatures exceeding _____ shall be physically guarded, isolated, or thermally insulated to protect against contact by personnel in the area.

a) 110°F
b) 120°F
c) 130°F
d) 140°F

See answer and applicable Code reference

The correct answer is: d) 140°F

Article 427 requirements apply to electrically energized heating systems and the installation of these systems used with pipelines or vessels. As noted in Sec. 427.12, External surfaces of pipeline and vessel heating equipment that operate at temperatures exceeding 140°F shall be physically guarded, isolated, or thermally insulated to protect against contact by personnel in the area."

 

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