Crabtree bus bar system

[AndyPRK]

Hi.

this rcd appears to have both a rear bus bar connection prong and 4 screw terminals. Something I hadn’t seen before.

is it dual purpose where I could just use the 4 jaws if I wanted ?

https://www.ebay.co.uk/itm/174812951722

 

[flameport]

There should be a blank plug in the lower right terminal.
Someone has removed it.

Who knows what other problems that device might have.
As it's on ebay, anything is possible.

 

[AndyPRK]

Thank you.

I’m used to seeing the blank plug but didn’t know there was a screw behind it, and also a jaw for a cable

 

[AndyPRK]

See this one doesn’t have an entry for the cable.

https://www.ebay.co.uk/itm/284282578099