What generally determines the permissible location of electrical installations in hazardous environments?

The permissible location of electrical installations in hazardous environments is primarily determined by the judgment of the authority having jurisdiction. This authority includes regulatory bodies and local electrical inspectors who interpret safety codes and standards, such as the National Electrical Code (NEC) in the United States. They assess the specific conditions of the hazardous environment, evaluate potential risks, and ensure compliance with established safety regulations.

The authority having jurisdiction takes into account various factors, including the nature of the hazards present, existing regulations, and the unique circumstances of the environment. Their judgment ensures that electrical installations are safe and appropriately located to minimize the risk of accidents, fires, or explosions.

While manufacturer recommendations, the distance from flammable materials, and the type of equipment used are important considerations in ensuring safety, these factors are typically guided by the overarching regulations enforced by the authority. Therefore, it is this authoritative judgment that is crucial in determining where electrical installations can be safely and legally placed in hazardous locations.