In which position must duplex receptacles be installed concerning their grounding contact?

The correct understanding regarding the installation of duplex receptacles is that there are no specific orientation requirements for the grounding contact. This means that it can be installed in any direction, whether it's facing upwards, downwards, or to the side, without compromising safety or functionality.

This flexibility in orientation allows for greater versatility in the design and installation of electrical systems, accommodating various conditions and preferences in a way that meets code requirements. It's important that the receptacle functions properly, but the positioning of the grounding contact does not dictate its performance.

Other orientations, while common, do not reflect a standard requirement, making the understanding of their optional nature crucial for practitioners in the field. The focus should be on ensuring a secure and compliant installation rather than adhering to a specific orientation for grounding contacts.