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What is the operating temperature of equipment above which de-icing or snow-melting cable must be guarded to prevent contact with personnel? a. $110^{\circ} \mathrm{F}\left(43^{\circ} \mathrm{C}\right)$ b. $120^{\circ} \mathrm{F}\left(49^{\circ} \mathrm{C}\right)$ c. $130^{\circ} \mathrm{F}\left(54^{\circ} \mathrm{C}\right)$ d. $140^{\circ} \mathrm{F}\left(60^{\circ} \mathrm{C}\right)$

   What is the operating temperature of equipment above which de-icing or snow-melting cable must be guarded to prevent contact with personnel?
a. $110^{\circ} \mathrm{F}\left(43^{\circ} \mathrm{C}\right)$
b. $120^{\circ} \mathrm{F}\left(49^{\circ} \mathrm{C}\right)$
c. $130^{\circ} \mathrm{F}\left(54^{\circ} \mathrm{C}\right)$
d. $140^{\circ} \mathrm{F}\left(60^{\circ} \mathrm{C}\right)$

Electrical Trainee Guide, Level 4

NCCER 9th Edition

Chapter 9, Problem 10

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What is the operating temperature of equipment above which de-icing or snow-melting cable must be guarded to prevent contact with personnel? a. $110^{\circ} \mathrm{F}\left(43^{\circ} \mathrm{C}\right)$ b. $120^{\circ} \mathrm{F}\left(49^{\circ} \mathrm{C}\right)$ c. $130^{\circ} \mathrm{F}\left(54^{\circ} \mathrm{C}\right)$ d. $140^{\circ} \mathrm{F}\left(60^{\circ} \mathrm{C}\right)$

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Key Concepts

Safety Standards in Thermal Systems

Thermal systems, such as those employing de-icing or snow-melting cables, operate under specific temperature thresholds defined by safety standards. These thresholds are established to ensure that when the equipment reaches elevated temperatures, appropriate measures are taken to prevent exposure to dangerous heat levels.

Operating Temperature

Operating temperature is a critical parameter indicating the level at which equipment functions safely. Exceeding this temperature may increase the risk of harm, necessitating additional safeguards to protect personnel from burns or other injuries.

Guarding of Hot Equipment

Guarding involves installing physical barriers or protective covers around equipment that can reach hazardous temperatures. This practice is essential to prevent accidental contact with surfaces or components that could cause burns or other injuries to personnel.

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