Type S RCD Polarity Clarification

[sirsparkalot]

Given the RCD pictured below





With the manufacturers instructions here:



Am i right in interpreting that as well as being able to bring the incoming feeds into the bottom, i can also switch the LIVE and Neutral sides over, so that this arrangement would be possible? Forigve the crudity of the drawing




The thing that gives me some doubts is the manufactures stamp on the RCD on the top left.

 

[pc1966]

Yes, it seems the RCD is symmetric in both ways so it could be used like you show.

However, would it not be better to take the supply from the busbar via your 50A MCB and then you can wire the delay RCD up the normal L/N way?

Top/bottom feed is immaterial here as the MI says, however, keeping L wire to the L-marked terminal is in keeping with the "principle of least astonishment".

 

[sirsparkalot]

Yeah, you make a good point, i'm so used to switches/protection/surge on the right and overcurrent to their left it didnt even enter my brain until you said it lol.

Saves scraping of the L and using a sharpie on the other side..

 

[mainline]

Yeah, you make a good point, i'm so used to switches/protection/surge on the right and overcurrent to their left it didnt even enter my brain until you said it lol.

Saves scraping of the L and using a sharpie on the other side..

Just out of curiosity has that tnc-s earthing

 

[sirsparkalot]

Just out of curiosity has that tnc-s earthing

TT at this board, and a separate earth rod at the end of the SWA, swa earthed to main board and not the remote CU.

 

[GroovyG]

Your drawing suggests that you might be modifying the DB beyond the manufacturer's design specification. If so, this could see you in breach of 536.4.203 so that you effectively become the manufacturer of the complete assembly with its attendant liabilities.