new shower...

[Steve]

You should be Ok with that setup.

I was concerned you had a house with 3 ringmains and an electric cooker etc. In which case that box would be unsuitable.

 

[scottfc]

Service fuse is possibly only 60A, just to add to the confusion.

having just looked at all that, and if the service fuse is only 60A surely its a fluke that i have not been having problems already?

 

[scottfc]

You should be Ok with that setup.

I was concerned you had a house with 3 ringmains and an electric cooker etc. In which case that box would be unsuitable.

na, its a two bed flat, with a grand total of 13 sockets.

 

[andy]

Service fuse is possibly only 60A, just to add to the confusion.

having just looked at all that, and if the service fuse is only 60A surely its a fluke that i have not been having problems already?

my house only has a 40A fuse (ive had it out before, has no seals). and it survives with a 9.5KW shower aswell as other loads. + electric cooker. almost 10 years down the line and no problem...

 

[Steve]

my house only has a 40A fuse (ive had it out before, has no seals). and it survives with a 9.5KW shower aswell as other loads. + electric cooker. almost 10 years down the line and no problem...

Why not change it for a bigger one while you had it out?

 

[colport27]

This is where that horrible word "diversity" comes into play.

 

[Adam_151]

Service fuse is possibly only 60A, just to add to the confusion.

having just looked at all that, and if the service fuse is only 60A surely its a fluke that i have not been having problems already?

Not really, its supprising how resiliant they are, looking at my chart here a 60A service fuse will take 100A for half an hour before opening, and I'd bet that any over load that big is short lived

That said a service upgrade to 80A/100A and a new CU wouldn't go amiss...

 

[colport27]

All through this post I have been trying to think of the experiments done at college........where you pump more and more ampege through a piece of fuse wire until it blows.
Ok, so im old now (grey hairs etc), but I do remember being rather surprised by how much more current over their rating they could take.

 

[andy]

my house only has a 40A fuse (ive had it out before, has no seals). and it survives with a 9.5KW shower aswell as other loads. + electric cooker. almost 10 years down the line and no problem...

Why not change it for a bigger one while you had it out?

1: its managed OK so far. if it goes, itll probably get replace with a 80/100

2: i had it out to change the isolator and didnt see the point in changing it

 

[colport27]

Why fix it til it`s broke attitude?

Not that I`m saying there is anything wrong with that before I am shot down.....lol.

 

[Steve]

OK, we're all talking about having low service fuses and higher rated consumer units . . .

now the opposite . . . where i work, there is a 3ph 100A incoming supply (only installed 3 years ago), and the main breaker for the whole shop is a C63

we have big fridges, air con, freezers, lights, im surprised its never tripped. And it was expanded recently, an additional DB added, for a coldroom, another air con, another freezer, more lights etc.

 

[andy]

now the opposite . . . where i work, there is a 3ph 100A incoming supply (only installed 3 years ago), and the main breaker for the whole shop is a C63

er... why is the main incomer a MCB?

 

[Steve]

now the opposite . . . where i work, there is a 3ph 100A incoming supply (only installed 3 years ago), and the main breaker for the whole shop is a C63

er... why is the main incomer a MCB?

you tell me?? its a 3-phase C63 as the main switch of about a 6 to 8-way 3ph board. This board got full a few months ago, so they decided to add on another board using another C63 in the original DB.