This section gives us a date to stop making connections to an equipment grounding conductor on January 1, 2020, at switch locations that have electronic dimmers or controllers installed. After that date we need to be using a neutral conductor to make these devices work, no longer allowing the equipment ground to be used for this purpose. Although a neutral is not necessary at all switch points section 404.2 C instructs us when and where a neutral is needed. And with all good Code changes there are exceptions, this does not apply to replacements or retrofits, and has a limit of 5 (five) devices per branch circuit and 25 (twenty five) per feeder connected on the load side in the system or main bonding jumper. A neutral busbar in compliance with 200.2 B has no limits as to the number of electronic devices connected to it.
Can’t see the whole picture just click on it.
Have a question email me at jleccemail@hotmail.com
Till next time be safe work safe.
Jake