breakers in a ccu
- Thread starter sneer7
- Start date
how many miles can a green car do on a tank of fuel? 
might as well ask how long is a piece of wire..
there are numerous configurations and manufacturers of CCU, it's down to the individual selecting it to decide what best suits theur needs..
from a little 2 way ccu designed for a garage to a great big stonking 30+ way 3 phase boards with a single phasing kit, to dual ccu's with 2 rows of breakers..
"80A ccu" is not a universally recognised term and will mean different to you than it does to everyone else.
might as well ask how long is a piece of wire..
there are numerous configurations and manufacturers of CCU, it's down to the individual selecting it to decide what best suits theur needs..
from a little 2 way ccu designed for a garage to a great big stonking 30+ way 3 phase boards with a single phasing kit, to dual ccu's with 2 rows of breakers..
"80A ccu" is not a universally recognised term and will mean different to you than it does to everyone else.
For what reason do you need to know ?
Ok then. Lets start from the beginning.
What do you need it for (ie what/how many/what rating circuits)?
RCBOs? Or Dual RCD? Single RCD with RCBOs? No RCD's at all......????
Rating for main fuse?
We need a tiny bit more to go on here....
again.. from 2way up to 21 way or more.. ( with the use of stacking kits ) it depends..
we need more info..
is this an existing CCU or one you intend to change / have changed
we need more info..
is this an existing CCU or one you intend to change / have changed
Old, straight boards run to 17 x positions. Newer ones with twin RCD tend to be 14 x positions + switch + 2 rcd's.
Larger house either go 3 phase if demand is high or have 2 x boards linked to the mains via a henley block which can take more than 1 set of 25mm tails.
The question also inter relates to the size of the mains head fuse (100 amp / 65amp) and the demand.
ie an 80 amp switch may have fuses with a combined amp count well in excess of the 80 amp switch. You need to consider that everything isn't used full tilt all the time, and check out the word 'diversity' which explains more about load calcs.
Larger house either go 3 phase if demand is high or have 2 x boards linked to the mains via a henley block which can take more than 1 set of 25mm tails.
The question also inter relates to the size of the mains head fuse (100 amp / 65amp) and the demand.
ie an 80 amp switch may have fuses with a combined amp count well in excess of the 80 amp switch. You need to consider that everything isn't used full tilt all the time, and check out the word 'diversity' which explains more about load calcs.
I think the easiest answer is "As many as you need". However, you must make sure your maximum demand, with diversity is taken into account, does not exceed 80amp (18.4kVA).
It is not as simple as saying "two x 32amp and a 16amp".
It is not as simple as saying "two x 32amp and a 16amp".
I'm with ricicle...
- Joined
- 11 Jan 2004
- Messages
- 46,400
- Reaction score
- 3,728
- Country
Do your respective partners know of this?
P
PrinceofDarkness
I can't see the need for any number of breakers in a 'CCU', since that term CCU means Cooker Control Unit. Perhaps the O/P meant some other device or enclosure?
Lucia.
Lucia.
According to part 2 of BS7671, a consumer unit may also be known as a consumer control unit. Or CCU if you like
DIYnot Local
Staff member
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local