Discuss Designing with diversity on sockets in the UK Electrical Forum area at ElectriciansForums.net
Common sense should prevail to avoid compromising the optimum division of an installation, solely to satisfy a diversity calculation.
Am I right in saying that that quick guide says you need to be concerned about overloading a CU with a mains switch that is rated at 100A.http://www.napitonline.com/downloads/CP 4 07 P 10-11 16th Diversity.pdf I HOPE THIS WILL HELP .
post 6#done keep up at the back
/QUOTE]
I gave him a link to a very informative video,you didn't do that in post 6 did you? Keep up at the back[
What makes you think the main fuse won't last?Am I right in saying that that quick guide says you need to be concerned about overloading a CU with a mains switch that is rated at 100A.
And the answer is to put the additional load onto a sub board.
Calculating load is witchcraft.
I'm doing and EICR on a 1990 instal that hasn't been touched in thirty years, no additions and no periodicals.
There are the following,
32A shower (7kw) =30.5A
32A shower (7kw) =30.5A
32A hob (6kw) and socket = 31A
32A kitchen sockets = 32A
32A lounge Sockets = 12.8A
32A up sockets =12.8A
32A up sockets = 12.8A
20A oven(3kw) and socket 18A
16A immersion (3kw) 13A
8 x 6A lights total (15kw) 7.2A
Now this comes out to around 200A.
In two CUs but the second is off the output of the firsts main switch.
Oh and there is a 60A switch fuse, off the source, for a granny Annex I've not even looked at yet.
Main fuse is original, so never blown.
Tempted to turn it all on and clamp it if the main fuse lasts long enough for me to reach the incomer.
What makes you think the main fuse won't last?
I'm doing and EICR on a 1990 instal that hasn't been touched in thirty years, no additions and no periodicals.Now, I could probably knock 25A off the sockets and 3 or 4 off the lights but I cannot see for the life of me how this was ever signed off.
In general the standard of the install is quite good.
So you think the fuse will blow at 101 amps because it has got the number 100 written on it???The number 100 printed on it.
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