A single unsafe act in a hazardous location can render all the Code compliance moot. Typically, death or injury from the unsafe act is confined to the person committing the act. Sometimes, a single unsafe act can cause the obliteration of the entire facility and everyone present.
- Smoking is unsafe in any location. Smoking in a hazardous location puts an ignition source where ignitibles and/or combustibles pose a threat to everyone.
- Don’t use tools not authorized for the location. It’s inconvenient to walk to the tool crib for a brass wrench for use in that Class I, Division 1 location. But taping your steel wrench or “being careful” will not prevent a spark; using a brass wrench will. Also, consider personal electronic gear (e.g., phone, radio) when working in these areas.
- Connecting a non-current carrying metal equipment frame to a ground rod does not eliminate a difference of potential. Always bond, rather than ground, equipment on the load side (regardless of classification).