Safety equipment was a term for anything used to ensure one's safety when performing a dangerous task.
In 2153, Malcolm Reed was baffled by the fact that three Denobulan scientists hadn't used any safety equipment whatsoever to climb down a sheer rock face. (ENT: "The Breach")
In 2373, B'Elanna Torres snapped at Neelix for attaching a fusing piton incorrectly, saying the Talaxian had no business rigging safety equipment without knowing how. (VOY: "Blood Fever")