Ring testing when stand alone RCD is used.

[Amp David]

Working on a RFC today and its had a stand alone RCD added previously which is installed outside of the 3036 fuse board.

When testing ring continuity and R1R2 would taking the conductors out of the RCD then joining them be the prefered method or taking 2 readings, one from the fuse board to the RCD then the other from the RCD out round the ring?

I know the values will be the same either way but just wanted to see how others would approach it.

 

[ian.settle1]

The only place you would get ring continuity would be on the outgoing side of the RCD not from the DB as upto the RCD from the DB is a radial circuit.

 

[Electricalserv]

I've been lost in translation on this one. What has the RCD got to do with testing a ring final? Why can't you just do a simple CoRFC test at the board?

 

[Deleted member 26818]

What are the size of the conductor between the CU and RCD?

 

[rocker]

I would take the reading from the top side of the RCD and call that my reading, then I would measure the link from the board to the RCD seperately and put this reading in 'notes'.

 

[Amp David]

What are the size of the conductor between the CU and RCD?

They are a pair of 2.5s. Look like when its been put in the have extended the legs of the ring to reach the outgoing side of the RCD the used 2 2.5s from the fuse to the RCD

 

[Amp David]

I've been lost in translation on this one. What has the RCD got to do with testing a ring final? Why can't you just do a simple CoRFC test at the board?

Stand alone RCD, not one in the board