Discuss Height of consumer units in the Electrical Forum area at ElectriciansForums.net

Charlie_

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I always install my consumer units between 450 and 1200, sometimes at 1400..
Am I right in thinking that CUs come under part M?

Extensions and rewires not covered by part M?

Anybody still installing them up at ceiling height?
 
O

Octopus

I always install my consumer units between 450 and 1200, sometimes at 1400..
Am I right in thinking that CUs come under part M?

Extensions and rewires not covered by part M?

Anybody still installing them up at ceiling height?
On refurbs I normally get the customer to decide ......... but certainly not at Part M heights ............ they are simply daft
 

telectrix

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new installation, you and the client have choices. on a replacement CU, you need to fit it wherever you can considering the existing supply and final circuits.
 

magnoliafan89

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When it comes to new builds the height R which part m has it as is that the breakers need to be between 1350 and 1450...quite low really but anything is better than cieling height...especially when you come to do an eicr and some turd has made it a right birds nest and you have a crooked neck whilst fiddling about in there
 

Ian1981

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Is it even in part M because I can’t see it?
It’s mentioned in part P as a guidance for the height of a CU but I don’t believe it’s actually a building regulation unless someone can show me different?
We are required tho on new builds to mount the CU with the mcbs at between 1350-1450 FFL.
 

Leesparkykent

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E7895044-0EEB-43B8-A32B-1408D91D0E40.jpeg
Is it even in part M because I can’t see it?
It’s mentioned in part P as a guidance for the height of a CU but I don’t believe it’s actually a building regulation unless someone can show me different?
We are required tho on new builds to mount the CU with the mcbs at between 1350-1450 FFL.
 
I believe the idea with not installing lower than 1350mm is to prevent small inquisitive children from getting access to it and playing with the switches. I’ve read that somewhere.

I think the 1350 is a good height if it can be achieved easily enough.

Very high consumer units are not ideal. Earlier this year I had a concerned daughter call me because her rather petite and elderly mother was climbing stepladders to keep resetting a breaker for a faulty water heater. Not good.
 

Leesparkykent

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3C34AFA2-3A77-4154-B632-270E9F6487FA.jpeg I’ve spoke to my LABC officer regarding this on refurbs/rewires and his stance is that when rewiring you should not install accessories at a height that is worse than compliance, than it was before you started. For example say the existing sockets are mounted at 300 then you install them at a height off between 300 and 1200. So you wouldn’t then go and install them at 250 as then they would be installed at a height that is worse than compliance, than before you started.
 

Charlie_

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  • #9
Thanks for the responses.,
Had a few occasions lately where the builder grumbled at the height of 1400.
Another new build cu went up high at ceiling height, fortunately building inspector didn’t pick up on it, I thought it was best not to ask him about it.
I think the 45o height would be handy as it can be located in a cupboard
 

magnoliafan89

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This was what i came across in a new build a while back. In a loft...and poorly installed me thinks.

I hate high cu's...I have to actually do work then....

20180127_145625.jpg

20180127_145633.jpg
 

123

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Usually see them at ceiling height over here. Was in 2 today, one built in 2014, one in 2016...both at ceiling height. On large developments as well...
 

Charlie_

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Usually see them at ceiling height over here. Was in 2 today, one built in 2014, one in 2016...both at ceiling height. On large developments as well...
Similar situation over here;
Large development, CUs in hallway above lounge door, looks naf but was probably the best location to facilitate a 2 day 1st fix.
 

Dave OCD

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On the odd new build that I do if the CU has to go somewhere on show like a hallway I'll use a flush board, looks much better.
 

ruston

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I always install my consumer units between 450 and 1200, sometimes at 1400..
Am I right in thinking that CUs come under part M?

Extensions and rewires not covered by part M?

Anybody still installing them up at ceiling height?
There is a whole new build estate here with them all at ceiling height in the garage.
Another estate a few years ago they are above the basin in the hall toilet.
 

telectrix

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There is a whole new build estate here with them all at ceiling height in the garage.
Another estate a few years ago they are above the basin in the hall toilet.
seen loads of them. need to stand on the bog to reach. cubicle too small to fit steps in.
 
regarding sockets- I know it states in the osg about sockets being at 450mm to the bottom, but is this purely for access reasons?
 
O

Octopus

regarding sockets- I know it states in the osg about sockets being at 450mm to the bottom, but is this purely for access reasons?
This isn’t an electrical reg ... it’s a building reg ... Part M to be precise. Lots of part M isn’t relevent to sparks BUT I do recommend you download it and be familiar with its contents ..
 

ruston

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This isn’t an electrical reg ... it’s a building reg ... Part M to be precise. Lots of part M isn’t relevent to sparks BUT I do recommend you download it and be familiar with its contents ..
It also says regarding switches , sockets heights etc... a way of achieving this... I think they share the same authors. :)
 

Charlie_

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I’ve done quite a few new builds where we were given special dispensation by building control to have different heights to that shown in part M..
Wasn’t your run of the mill type house but as said the stated heights is just a suggestion not an instruction.
 
O

Octopus

Not being difficult but do the part M heights apply in basements? where the only access is via stairs?
 

Tony Reidy

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I always install my consumer units between 450 and 1200, sometimes at 1400..
Am I right in thinking that CUs come under part M?

Extensions and rewires not covered by part M?

Anybody still installing them up at ceiling height?
Yes but only if that's where the original one was
 
I went to a commercial property a few years ago to replace the meter and was told it was located above the suspended ceiling. Stepladder out, lifted and moved panel out of the way and peered into the void.
Nothing to see.....no cut out, no meter.
“You sure it’s up here?”
“Yes...look up!”
I did and was greeted by the cut out and meter staring down at me having been mounted on the original ceiling!!!
In case of an electrical emergency...remove ceiling...cut seals and remove fuse!
 
I think (or thought) the building regs (unlike the BBB) are statutory documents and dimensions given are not 'recommendations' but dimensions to be complied with?
 

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