True or False: Transformers are required to be marked with a minimum clearance for ventilation.

• A. True
• B. False
• C. Not specified
• D. Sometimes

Answer: (A)

Yes—Transformers must be marked with the minimum ventilation clearance. This labeling exists because transformers generate heat and need adequate air flow to dissipate it. The required distance is typically shown on the transformer’s nameplate or installation instructions, guiding installers to keep enough space from walls, other equipment, and combustibles. Maintaining this clearance ensures proper cooling, safe maintenance access, and reduces the risk of overheating or fire.