Thermal scans of electrical equipment are useful for:

Step 1: Purpose of Thermal Scans

Thermal scans (infrared thermography) detecttemperature variationsin electrical components.

Loose connectionsincrease resistance → causeoverheating, which isvisible in thermal scans.

Step 2: Analysis of Each Option

A. Locating areas of high power factor❌Incorrect→Power factor is measured with power meters.

B. Reading current-carrying capacity of conductors❌Incorrect→Measured using ammeters and engineering data.

C. Locating a loose electrical connection✅Correct→Loose connections causeheat buildup, easily detected with thermal scans.

D. Measuring the load on a refrigerant system❌Incorrect→Refrigerant loads are measured usingpressure sensors and flow meters.

Thus, the correct answer isC. Locating a loose electrical connection.