In which of the following locations is piping required to be protected by shield plates?

The correct choice is based on the regulations that specify when and where shield plates must be used to protect piping. According to the International Residential Code, when piping is installed in concealed spaces near the edges of framing members, there is a risk of the piping being damaged by the fasteners used in fastening or securing those members, such as nails or screws. Therefore, shield plates act as a protective barrier to prevent any potential punctures or damages to the pipes.

The importance of the specified distance from the edges of members is crucial because it identifies areas where the integrity of the piping could be compromised. When pipes are installed too close to the edge, they are more vulnerable, hence the requirement for shield plates in those particular situations.

In contrast, the other options do not address the specific requirements set forth in the IRC regarding shield plates. While protection near electrical components is important, it does not specifically relate to the installation of shielding for plumbing. Additionally, the requirement is not for "all locations" nor limited to only "exposed areas." The regulations specifically focus on concealed locations near edges, which is why shield plates are mandated in those circumstances.