What type of wire is used for the load drawing 19.8 amps at 208 volts?

When determining the type of wire suitable for a load drawing 19.8 amps at 208 volts, it's important to consider the characteristics of the various wire types available. THHN (Thermoplastic High Heat Resistant Nylon-coated) and THWN (Thermoplastic Heat and Water-resistant Nylon-coated) wires are both designed for similar applications, but their specific characteristics make them valuable in different contexts.

THHN wire is primarily used for dry locations, while THWN wire is designed to be used in wet or damp environments due to its water-resistant properties. Since both THHN and THWN can carry sufficient amperage for the specified load, either wire could be a valid choice depending on the installation conditions.

For this particular application, as long as the installation meets the necessary code requirements regarding the environment (dry or wet), using either THHN or THWN would adequately handle the current. Therefore, both types of wire would be appropriate for a load of 19.8 amps at 208 volts, making the choice of "Both THHH and THWN" the correct answer.

NM-B (Non-Metallic sheathed cable) is generally not appropriate for outdoor or wet environments and does not have the same heat resistance ratings as the other two