How can raceways be protected in hazardous environments?

Raceways can be effectively protected in hazardous environments by enclosing them in explosion-proof fittings. This approach is crucial because hazardous locations, such as those with flammable gases, vapors, or dust, present serious risks for electrical installations. Explosion-proof fittings are specifically designed to contain any potential explosions within the fitting itself, preventing the ignition of explosive atmospheres outside.

Choosing explosion-proof fittings ensures that the electrical components and wiring within the raceway are safeguarded against external hazards. These fittings are rigorously tested and constructed to withstand the pressure of an internal explosion without allowing flames or hot gases to escape, thus providing a high level of safety in environments where risks are present.

The other options, while they may provide some level of protection in specific contexts, do not offer the robust defense required for hazardous environments. Standard fittings may not meet the stringent safety requirements necessary in such locations. Fire-resistant paint provides a layer of protection but does not prevent explosions from occurring in the first place. Increasing the size of the raceway does not contribute to explosion safety and could create other issues related to installation and space usage.