Field markings for service equipment in non-dwelling units must be legible and durable to withstand the environment. True or False?

• A. True
• B. False
• C. Only legible marks are required
• D. Durability is optional

Answer: (A)

Field markings on service equipment in non-dwelling units must be legible and durable to withstand the environment. The reason is these markings convey essential information—like component identification, ratings, and warnings—and must remain readable over time despite exposure to weather, moisture, temperature changes, abrasion, and chemical factors. If markings fade or wear away, responders and maintenance personnel can’t quickly and safely identify equipment, which raises the risk of incorrect operation or unsafe actions. Therefore both readability and longevity are required to ensure ongoing safety and compliance. The other options fall short because they ignore either readability or durability, which together protect people and equipment in real-world conditions.