RCD tripping ???

[matt.leung]

just installed a new consumer unit today. when one rcd trips (durung rcd testing etc) the other one trips, but when testing the second RCD the first one does not trip..

any thoughts - do i have a doggy RCD ??? headbangheadbangheadbang

 

[Andy™]

probably a borrowed neutral somewhere

 

[m4tty]

Did you swap them around to see if the fault moves or stays ?

 

[Steve3948]

Or you have a Neutral to fabric of building fault.

 

[SLIPSHOD & SLAPDASH]

just installed a new consumer unit today. when one rcd trips (durung rcd testing etc) the other one trips, but when testing the second RCD the first one does not trip.. Any thoughts - do i have a doggy RCD ??? headbangheadbangheadbang

Should this be in the Ask the vet section

 

[Doc Hudson]

Most likely untested wiring fault, or incorrectly wired internal CU connections. Typical DIY fault, generally easily identified and remidied by a competent person. As such thread moved.

Doc H