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Using a metal ladder in areas with electrical elements is advised against due to the inherent conductivity of metal. When working near live electrical circuits or overhead power lines, there is a serious risk of electrical shock or electrocution if the metal ladder makes contact with any electrical source. Metal conducts electricity effectively, meaning any accidental contact can lead to dangerous situations for the user. Therefore, it is essential to utilize ladders made of non-conductive materials, such as fiberglass, when working in environments where there is a risk of electrical hazards.

Using a metal ladder indoors is typically safe as long as there are no electrical hazards present. Storing a ladder outside may expose it to environmental elements, which can be a concern for its longevity but does not pose a safety risk while using it. Similarly, metal ladders can be used for painting tasks as long as there are no electrical risks involved. In essence, the most critical safety consideration with a metal ladder revolves around its interaction with electricity, making its use near electrical elements particularly hazardous.