Adding RCD protection to existing circuits

[Andy5678]

Here’s a commercial scenario for you to comment on over you nightly dram.

So there is an existing consumer unit with older style MCBs or bs88 fuses. RCBOs cannot be added to existing and customer wont pay for a new consumer unit.

My soloution is to add a garage unit onto the side. Remove main switch and feed singles through to RCBOs. Use multiple supply label, 400v etc

Anyone got any better ideas?

 

[snowhead]

What has prompted the need for RCD protection on the existing circuits?

 

[buzzlightyear]

Anyone got any better ideas

yeah, walk away .

 

[Andy78]

An additional RCD would be sufficient and eliminate having two OCPDs of the same value.
Where would the second supply come from to necessitate a label ?

 

[buzzlightyear]

yes he could put a up front rcd unit next to the main 100amp isolator .

 

[Andy5678]

What has prompted the need for RCD protection on the existing circuits?

C2 repair.

An additional RCD would be sufficient and eliminate having two OCPDs of the same value.
Where would the second supply come from to necessitate a label ?

If there were 2 circuits in the new unit. Would you use an rccb?

 

[buzzlightyear]

If there were 2 circuits in the new unit. Would you use an rccb

100 amp isolator, 2x rcbos

 

[buzzlightyear]

some body in Scotland go to andy5678 house and prod him with a stick to wake him up cause he has fallen a sleep.

 

[Deleted member 26818]

What are the circuits that require RCD protection?

 

[Andy5678]

Hi buzz. What size tails would you use for switch and can only come off an existing spare way in the CU.

 

[Andy5678]

Ring finals mainly.

 

[Deleted member 26818]

Ring finals mainly.

Is this horticultural/agricultural?

 

[buzzlightyear]

Hi buzz. What size tails would you use for switch and can only come off an existing spare way in the CU.

separate the circuits from the old board and put on to a new board ,have you go any pics .

 

[buzzlightyear]

C2 repair

please elaborate on this .

 

[ipf]

When it comes to commercial or industrial, especially, it can be worth taking into account what problems could be caused to work output by covering a full power circuit with one rcd unit. In such situations, rcd sockets are the option, dependant upon wiring methods, of course.