Exceeded max demand questions

[JAWS]

Please forgive me if I am wrong here and most probably am but wont some electricians add all the MCB's by taking the highest MCB away first which in this case would be 172a divide that by 4 then add the 40a MCB back on which gives a total of 83a

 

[Octopus]

Reality check

The diversity "guide" is way out of date and in cases like this (assuming there is no electric space heating) should be ignored.

I'd be surprised if the load per day exceeded 10kw

 

[Baddegg]

Please forgive me if I am wrong here and most probably am but wont some electricians add all the MCB's by taking the highest MCB away first which in this case would be 172a divide that by 4 then add the 40a MCB back on which gives a total of 83a

X 0.4 mate not divide by 4 which comes out at 68.8 + the 40......but as before that’s not a realistic way of applying diversity especially in a domestic scenario

 

[Deleted account]

I normally use the times 4 as a useful rule of thumb, but common spence needs to prevail.

As has already been said having the socket circuits devided between 5 breakers or having them on one breaker would make a massive difference on the total calculated load, but no difference on the actual load.
It's good practice to split the sockets onto a few mcb's but in this scenario itsprobable that the socket circuits are pulling no more than 32A between them.
Do the actual loading for each circuit and find out.

 

[telectrix]

and bear in mind that showers are only on for maybe 30 minutes every 24 hours, cookers on maybe 3 hours per day. most of the rest is trickle.

 

[snipersmith87]

Id be opting for a board change with the one rccb protecting all those circuits.

 

[Strima]

Id be opting for a board change with the one rccb protecting all those circuits.

So what about division of circuits?

 

[snipersmith87]

So what about division of circuits?

??

 

[DPG]

I don't think he means put a new board in with only one RCD!

 

[Strima]

That's what I read it as.

 

[DPG]

The existing board only has one RCD. He means replace the board for one which has more than one, and thus performs better re division of circuits etc.

 

[snipersmith87]

I don't think he means put a new board in with only one RCD!

I w

The existing board only has one RCD. He means replace the board for one which has more than one, and thus performs better re division of circuits etc.

The existing board only has one RCD. He means replace the board for one which has more than one, and thus performs better re division of circuits etc.

Took the words out of my mouth DPG!!

 

[Strima]

I get it now... As clear as a conversation with my wife...