main neutral wiring rcd in fusebox.consumer unit.?

gamer

I replaced old consumer unit with new 1,ie fusebox.i wired in all wires in as in old consumer unit,brandname hager,rcd has 2 connnectors top ,1 is live feed brown, other is blue neutral tail,connected to neutral terminals on lower right hand side.SO I FORGOT TO WRITe DOWN,where does main blue neutral feed go,??so only place it can go is one of the connectors in the rcd either top or bottom of rcd NEUTRAL SIDE or else to 1 of the connectors on the neurtral block terminals.where is the correct place 4 the main neutral to go? i think nuetral loop was wired into top connector on rcd when i bought it, lower connector on rcd is empty on neutral side.

Jackz

Hey generally you have two neutral terminal blocks in a modern fuse board, you connect the main neutral coming from the esb meter to one say lets call it Terminal Block A. Connect the neutrals for all circuits which do not go through the rcd e.g. lights, water pump to Terminal Block A. From Terminal Block A connect to the top left of the RCD. Also take a live feed from the main Switch Fuse or the bottom of any of the other mcb's to the top right of the RCD. Connect from the bottom left from the RCD to the second terminal block lets say Terminal Block B. Connect the neutrals for circuits protected by the RCD to Terminal Block B. Connect from the bottom right of the RCD to the bottom of the first (RCD protected) MCB and use some buzbar to extend this to the other MCB's for circuits which require RCD protection.

gamer

so rcd has at top 2 connectors on top, 1 is neutral loop to terminal block a.other is main live feed from meter, so THE MAIN NEUTRAL FEED blue goes to terminal block a.ie to be clear its not connectted directly into rcd connectors top or bottom, it goes onto TERMINAL BLOCK alongside other blue nuetral cables ie feeds to sockets lights etc.i assume rcd nuetral connector underneath ie lower connector is used 4 a loop to block a or block b neutral blocks.thanks 4 alll your help.

Jackz

OK look at the first picture in this link:

http://www.diydoctor.org.uk/projects/consumer_unit.htm

E is yor RCD.

We do not use D in our wiring system there is no reqirement to break the neutral in the fude board. Instead we have a main switch fuse to break the live feed you can see Cable G is the feed to the RCD from the main switch.

So Cable F going to Terminal Block A at the top of the board is your neutral tail coming from the ESB Meter Box.

Jackz

Also your lights (neutrals) are connected to Termainal Block A as they are not protected by the RCD. Yor sockets on the other hand are protected by the RCD so you would connect the neutrals for socket circuits to Terminal block B.

The big picture:

Neutrals:

Connected to Terminal block A:

The tail coming from the Meter Box.

The neutrals for circits not protected by the RCD.

The RCD itself (Top of left pole).

Connected to Termainal Block B:

The neutrals for circuits protected by the RCD. e.g. Sockets

The RCD, Bottom of left pole.

Lives:

Live Feed from meter box is connected to the top of the Main Switch fuse.

From the bottom of the Main Switch Fuse Connect to the bottom of all MCB's for circuits not protected by the RCD. e.g. Lights

Also From the Bottom of the Main Switch Fuse connect to the top right Pole of the RCD.

From the bottom right pole of the RCD connect to the bottom of all MCB's for circuits protected by the RCD. e.g. socket circuits.

The idea you have to get in yor head is that there are a set of live and neutral connections in your fuse board that are in sense direct from the esb tails and are protect for overload by the Main Switch Fuse and the individual MCBs, and a second set of lives and neutrals that as well as being protected for overload are protected if current finds it way to the earth.

Circuits which require RCD protection:

Sockets, Showers, Outdoor lighting and other outdoor equipment.

Sockets which are not on RCD:

Indoor Lights, Water Pumps, Cookers.

Jackz

Also your lights (neutrals) are connected to Termainal Block A as they are not protected by the RCD. Yor sockets on the other hand are protected by the RCD so you would connect the neutrals for socket circuits to Terminal block B.

The big picture:

Neutrals:

Connected to Terminal block A:

The tail coming from the Meter Box.

The neutrals for circits not protected by the RCD.

The RCD itself (Top of left pole).

Connected to Termainal Block B:

The neutrals for circuits protected by the RCD. e.g. Sockets

The RCD, Bottom of left pole.

Lives:

Live Feed from meter box is connected to the top of the Main Switch fuse.

From the bottom of the Main Switch Fuse Connect to the bottom of all MCB's for circuits not protected by the RCD. e.g. Lights

Also From the Bottom of the Main Switch Fuse connect to the top right Pole of the RCD.

From the bottom right pole of the RCD connect to the bottom of all MCB's for circuits protected by the RCD. e.g. socket circuits.

The idea you have to get in yor head is that there are a set of live and neutral connections in your fuse board that are in sense direct from the esb tails and are protect for overload by the Main Switch Fuse and the individual MCBs, and a second set of lives and neutrals that as well as being protected for overload are protected if current finds it way to the earth.

Circuits which require RCD protection:

Sockets, Showers, Outdoor lighting and other outdoor equipment.

Sockets which are not on RCD:

Indoor Lights, Water Pumps, Cookers.