What must be done with appliances installed in areas with an ignition source when related to safety?

When appliances are installed in areas where there is a potential ignition source, it is crucial to elevate the appliances above ground level. This practice helps prevent potential ignition of flammable vapors and liquids that may accumulate at ground level. Elevating the appliance reduces the risk of accidental ignition from sparks, flames, or high temperatures that might occur in the vicinity.

In certain applications, elevating the appliance can also assist with drainage and prevent damage from flooding or moisture, which may lead to corrosion or other operational issues. It effectively enhances the overall safety of the installation by mitigating risks associated with ignition sources that could result in fire hazards.

Other options, such as installing appliances at ground level or surrounding them with fireproof materials, do not address the underlying issue of vapor accumulation and possible ignition sources effectively. While automatic shut-off valves may be beneficial in certain scenarios, they do not provide a proactive solution to the immediate risk of ignition from ground-level sources.