TRIAC Dimmable Power Supply and Low Voltage Wires

I recently purchased the TRIAC dimmable power supply and Centric LED strip lights. Our contractor however wired low voltage wires from the transformer to the in-wall switch (box), and two strips (~4 ft each) are wired to this box. The walls were closed before I could review this with them. Because this differs from the recommended setup with control before the transformer, can an in-wall dimmer be connected to the low-voltage line, or am I now stuck only being able to use a toggle switch for this setup?

Unfortunately, this is not the correct setup as most in-wall dimmers require line voltage (120 volts AC) to operate properly. Furthermore, for safety and electrical code reasons, we strongly recommend connecting the in-wall dimmer to the line voltage side.

While we understand this may lead to additional costs and project delays, we recommend reconfiguring the wiring to ensure that all components are connected correctly.

Could an ELV dimmer (e.g. Lytton DVELV-300P) be used in conjunction with the low-voltage configuration? 

Unfortunately, both forward phase and ELV dimmers are designed to be used on line-voltage circuits only, so we'll be running into the same concerns and issues here. 

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LED power supplies

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