Elecric shower RCD size help please,[Should of said MCB]

[hyscore]

Hi.We have just bought a Mira Sprint 8.5 kw @ 240v
7.8 kw @ 230v
To relace our old 9.5 Gainsborough shower.We have a 10mm cable[underfloor and trunking] and a 40amp RCD aready fitted.
Would the Mira be ok with the 40amp RCD?Its just the instruction booklet for the MIRA[which covers the 8.5 and 9.5]states it must have a 30ma rcd.
Thank you.

 

[weepin dog]

look on rcd, should say rating + milli amp rating
ie, 40amp 30ma(milli amp)
if your ma rating is higher ie 100ma buy new if not get existing tested to make sure it trips between correct times.

 

[Lectrician]

I suspect you are talking cross terms. The 40amp 'RCD; you say you already I have I suspect is actually an MCB. You may not even have any RCD protection.

 

[hyscore]

I think I should of said 40 amp MCB.

 

[hyscore]

Maybe the pic will help.

 

[hyscore]

Ok I have just checked and I do have a 30ma Rcd,Will the 40amp MCB be ok with the above shower
Many thanks

 

[JohnD]

yes

 

[Lectrician]

All good

 

[hyscore]

Thank you very much.

 

[Steve]

Does #11 trip much?

 

[JohnD]

lets hope it means "oven" not "cooker"

 

[Steve]

Even so, a heavy load for a B16 - if it is the whole kitchen socket load and an oven.

 

[hyscore]

Its a gas oven/hob its only for the ignition and light.