Sub Mains to a Load Centre in a Domestic Dwelling
I am a retired electrician doing a home rewire.
I'm taking my time because I fell about 3m off a ladder & put both bones through the inside of my right leg.
That has slowed things down a lot...
My understanding of the AS:3000 regs is that all circuits in a domestic residence must be RCD protected.
When we moved here I replaced the tiny & cramped outside switchboard with a bigger one.
Later I fitted a loadcentre in the kitchen so I didn't have to go out in the cold & wet to troubleshoot.
I am totally upgrading the kitchen loadcentre.
It is a 36 pole, 3x 12 with all Clipsal Max9 internals.
Although a major clean up has rendered it unnecessary, I was a hoarder so I went for the Arc Protect breakers for extra protection due to the extra fuel load in the building at the time.
My question is regarding the sub-mains into the loadcentre.
The way I read the regs is that it has to be 30mA protected or protected by an earthed enclosure inside of walls.
Being a submains, it cannot be 30mA protected if the final circuits are also 30mA protected.
That would make the section up inside the wall from the switchboard to the ceiling & down inside the wall from the ceiling to the loadcentre needing to be in an earthed enclosure.
Steel pipe or conduit would be a pain to fit.
I found a supplier that sold small lengths of Anaconda Flex Metal Conduit with plastic outer sheathing so I picked up some.
This has a spiral wound galvanised iron central section with plastic outer sheathing.
I have the correct metal end fittings with screwed lock rings that have a wire tunnel & screws to make the earth connections.
The highest part of our ceiling is low enough that you need to remain bent over which makes working up there awkward - especially when you have a lot of years on the bones.
I rescued undamaged dressed pine from a skip after a local flood & ran two strips the full length of the ceiling.
I fitted sections of ply spaced along it so you can scoot along on...
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Sub Mains to a Load Centre in a Domestic Dwelling for more information
You may reply to this message here.
I am a retired electrician doing a home rewire.
I'm taking my time because I fell about 3m off a ladder & put both bones through the inside of my right leg.
That has slowed things down a lot...
My understanding of the AS:3000 regs is that all circuits in a domestic residence must be RCD protected.
When we moved here I replaced the tiny & cramped outside switchboard with a bigger one.
Later I fitted a loadcentre in the kitchen so I didn't have to go out in the cold & wet to troubleshoot.
I am totally upgrading the kitchen loadcentre.
It is a 36 pole, 3x 12 with all Clipsal Max9 internals.
Although a major clean up has rendered it unnecessary, I was a hoarder so I went for the Arc Protect breakers for extra protection due to the extra fuel load in the building at the time.
My question is regarding the sub-mains into the loadcentre.
The way I read the regs is that it has to be 30mA protected or protected by an earthed enclosure inside of walls.
Being a submains, it cannot be 30mA protected if the final circuits are also 30mA protected.
That would make the section up inside the wall from the switchboard to the ceiling & down inside the wall from the ceiling to the loadcentre needing to be in an earthed enclosure.
Steel pipe or conduit would be a pain to fit.
I found a supplier that sold small lengths of Anaconda Flex Metal Conduit with plastic outer sheathing so I picked up some.
This has a spiral wound galvanised iron central section with plastic outer sheathing.
I have the correct metal end fittings with screwed lock rings that have a wire tunnel & screws to make the earth connections.
The highest part of our ceiling is low enough that you need to remain bent over which makes working up there awkward - especially when you have a lot of years on the bones.
I rescued undamaged dressed pine from a skip after a local flood & ran two strips the full length of the ceiling.
I fitted sections of ply spaced along it so you can scoot along on...
Read more
Sub Mains to a Load Centre in a Domestic Dwelling for more information
You may reply to this message here.
