The January 2005 Illustrated Catastrophes column called attention to an installation at a water plant in northern Ohio in which a flexible cord ran from an explosion-proof junction box to a PVC-coated conduit body. The submitter incorrectly asserted that the area was hazardous, in which case the exposed connection would have violated 501.15. The flexible cord was used because the area it served wasn't
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The January 2005 Illustrated Catastrophes column called attention to an installation at a water plant in northern Ohio in which a flexible cord ran from an explosion-proof junction box to a PVC-coated conduit body. The submitter incorrectly asserted that the area was hazardous, in which case the exposed connection would have violated 501.15. The flexible cord was used because the area it served wasn't accessible by any other means. The purpose of the explosion-proof box was to mount and protect a solid-state, low-voltage amplifier from the environment. The sensor was part of a chlorine alarm system and wasn't in a hazardous or classified area. The installation met the Code's requirements.
