These measures include proper earthing, fencing, warning signs, protective equipment, and regular inspections. The Occupational Safety and Health Administration will determine whether an installation that does not conform to this ANSI standard complies with paragraph (b) of this section based on the following criteria: (3). The responsibility for providing and installing all signs and labels lies with the engineering contractor / Installer. Within substation yards and transformer areas, it is mandatory to affix “High Voltage” warning signs on the fences. These signs must also indicate the highest voltage level. Installing metallic or non-metallic fences along the perimeter is bound to prevent incidents of trespassing, deliberate scaling, stray animals foraying into the premises, and more importantly, children gaining entry into the area. In this guide, we'll break down everything you need to know to install a distribution box correctly and confidently. Choose the right box based on environment (indoor/outdoor), load capacity, and durability. Check for proper IP/NEMA ratings and material quality. Ensure safe placement: install in. Distribution box is a low-voltage distribution device which assembles switchgear, measuring instruments, protective appliances and auxiliary equipment in a closed or semi-closed metal cabinet or screen according to the requirements of electrical wiring.