Code Change Summary: Revised code language addresses the use of electronic control switches other than dimmers.

The electrical code must always adapt to advancing technology. Basic requirements for dimmer switches first appeared in the 2002 NEC^® in Section 404.14(E). Since then, technology has advanced to the point where there are electronic switch control devices that can do an array of things and even communicate with a smart phone remotely. As switches become more complex, the code requirements need to catch up.

In the 2020 NEC^®, language was added in this section to address the unique characteristics of electronic type switches and the loads they are designed to control. First, electronic control type switches shall only be used to control permanently connected loads. Second, they must be marked by their manufacturer with their current and voltage ratings and used for loads that do not exceed their ampere rating at the voltage applied.

Being cognizant of the limitations of the electronic control switch ensures that the switch isn’t overloaded which could cause heating behind the faceplate leading to a fire hazard.

Below is a preview of the NEC^®. See the actual NEC^® text at NFPA.ORG for the complete code section. Once there, click on their link to free access to the 2020 NEC^® edition of NFPA 70.