consumer unit 80a isolator

[darren bergin]

Most consumer units have 100a isolator 83a rcd

Alot of places selling consumer units with 80a isolator and 63a rcd
is this normal

Can you still fit one of these CU'S when there is a 100a service fuse to property?

thanks

 

[Taylortwocities]

It depends on the assumed load on the board.

Would you use a 63A rated RCD if you had a 40A shower and three ring final circuits on it?

 

[darren bergin]

assummed load
3 bed semi
lighting up/down
3 rings kitchen, upstairs, downstairs
no electric shower or cooker at present

would CU with 80a isolator and 63a rcd do?
thanks

 

[securespark]

I've never understood why modern CU's don't have both devices rated to 100A.

 

[darren bergin]

would the 80a isolator and 63a rcd do for this set up.
thanks

 

[davy_owen_88]

no electric shower or cooker at present

would CU with 80a isolator and 63a rcd do?
thanks

If you intend on getting an electric cooker/shower at a later date then you should get an 80A RCD so it doesn't need changing later on. Otherwise a 63A RCD should be fine.

If your expected maximum demand is >80A then you'll need to get a bigger isolator also.

 

[Taylortwocities]

I've never understood why modern CU's don't have both devices rated to 100A.

Probably so suppliers can compete on price for SL boards.
You know what happens:
July: "I bought the Marbo board because it was £15 cheaper than the Wylex one"

November: "Why dont my sockets and the shower work anymore?"

 

[CallEdsFirst]

Both Electrium companies along with Crabtree! Component quality shouldn't be far off! Just the overall quality of the structure of the board, ease of fitting etc!