Relays between a Separately Derived System (SDS)

[Bronco9588]

I have an isolation transformer serving a marina application with the applicable code being the 2020 NEC. Homeowner wants to control lighting on the downstream SDS by a switch upstream the SDS. My plan was to utilize a 120VAC relay to bridge the SDS. Anything I need to be aware between EGC, GFCI on the upstream system, or overall permissibility with regard to use of relays?

 

[synchro]

One way that would certainly be compliant, if not the least cost, is having a wireless transmitter and receiver bridge the two SDS.
For example, with the following transmitter and receiver/area controller:

CUV Control Transmitter

Part NumberE9X-CUV DescriptionThe CUV Control Transmitter is the ILLUMRA method to wirelessly bridge control from one circuit to another. The CUV Control Transmitter monitors any line voltage circuit and broadcasts the status to wirelessly control one or more circuits connected to

illumra.com

20A On/Off Area Controller

Part NumberE9X-RUV-4IBTPRequest a Quote form:Item*Quantity*Phone Number*Name*CompanyEmail Address*State(Blank)AlabamaAlaskaArizonaArkansasCaliforniaColoradoConnecticutDelawareDistrict of

illumra.com

 

[Bronco9588]

One way that would certainly be compliant, if not the least cost, is having a wireless transmitter and receiver bridge the two SDS.
For example, with the following transmitter and receiver/area controller:

CUV Control Transmitter

Part NumberE9X-CUV DescriptionThe CUV Control Transmitter is the ILLUMRA method to wirelessly bridge control from one circuit to another. The CUV Control Transmitter monitors any line voltage circuit and broadcasts the status to wirelessly control one or more circuits connected to

illumra.com

20A On/Off Area Controller

Part NumberE9X-RUV-4IBTPRequest a Quote form:Item*Quantity*Phone Number*Name*CompanyEmail Address*State(Blank)AlabamaAlaskaArizonaArkansasCaliforniaColoradoConnecticutDelawareDistrict of

illumra.com

Direct wiring is only going to cost $20 for the relay. However, I do like this idea and will save it for future plans!

 

[petersonra]

Direct wiring is only going to cost $20 for the relay. However, I do like this idea and will save it for future plans!

Plus who knows how much for electrician labor.

I think as long as you are not bringing foreign power to the dock you are OK. So the relay can't be on the dock.