In atmospheres where combustible dust is present, power-operated industrial trucks must bear which designation?

In atmospheres where combustible dust is present, power-operated industrial trucks must bear which designation?

• A. LP
• B. EX
• C. GV
• D. DP

Answer: (B)

In areas with combustible dust, equipment must be designed to prevent ignition of the surrounding dust. The EX designation signals explosion protection—showing the power-operated industrial truck is built to withstand or contain ignition sources, like sparks or hot surfaces, so it won’t ignite the dust in the environment. The other markings don’t indicate this level of explosion protection, so they don’t meet the safety requirement for dusty atmospheres.

In areas with combustible dust, equipment must be designed to prevent ignition of the surrounding dust. The EX designation signals explosion protection—showing the power-operated industrial truck is built to withstand or contain ignition sources, like sparks or hot surfaces, so it won’t ignite the dust in the environment. The other markings don’t indicate this level of explosion protection, so they don’t meet the safety requirement for dusty atmospheres.