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Article 547 addresses agricultural buildings and the special issues related to these buildings.
The presence of animals and animal excrement makes it very likely that there will be excessive dust and/or water that may create a corrosive atmosphere and could cause deterioration of the electrical system if corrosion-resistant wiring methods were not used.
This article does not necessarily address every place where an animal might live or be held, but it does address places that might present an additional shock hazard to people and animals because of the possibly wet and corrosive environment.
Animals, particularly larger animals, may have a greater susceptibility to shock hazard at very low voltages than people do. This article does address the increased risks to animals, but it also covers safety of the people that have to work in those areas. This article includes requirements for an equipotential plane that is similar, at least in concept, to the grounding and bonding methods specified for patient care areas and swimming pools.
© Hughes Associates,Inc. 2012