An approach limit at a distance from an exposed energized electrical conductor or circuit part within which a shock hazard exists
1.there is an increased likelihood of electric shock, due to electrical arc-over combined with inadvertent movement
2.when an arc flash hazard exists, an approach limit from an arc source at which incident energy equals 1.2 cal/cm2 (5 j/cm2)

Which of the following warnings would an agricultural chemist tell a farmer who wants to recycle his or her own ammonia? recycling ammonia is a difficult process that sometimes takes weeks. recycling ammonia requires a degree in biochemistry or a related field. recycling ammonia can be harmful because it is highly flammable and toxic. recycling ammonia costs too much money considering the price of the necessary chemicals.