S
sterandall
hi, just looking for some help on how to install the main bonding on a large industrial building.
Firstly the supply neutral to the building is over 150mm so am i correct thinking i need to use 50mm bonding conductors for water etc?
Secondly the MET is about as fair away as possible on this site, there are MCCB boards all over the place with a 70+ earth to them and tray mounted earth bars with 50+mm earth to them, as long as i verify these are still connected can my bonding conductors come off of these?
I also need to install the bonding in another building on the same site for structural steel, water and hot water, the supply at this building is 25mm with a 70mm earth, what size bonding conductor do i need to use here? and can i just take it from the distribution board?
Any help and i will be very grateful, as ive never worked on a site this size and am pretty much lost in regards to what i can and cant do,
thanks
Firstly the supply neutral to the building is over 150mm so am i correct thinking i need to use 50mm bonding conductors for water etc?
Secondly the MET is about as fair away as possible on this site, there are MCCB boards all over the place with a 70+ earth to them and tray mounted earth bars with 50+mm earth to them, as long as i verify these are still connected can my bonding conductors come off of these?
I also need to install the bonding in another building on the same site for structural steel, water and hot water, the supply at this building is 25mm with a 70mm earth, what size bonding conductor do i need to use here? and can i just take it from the distribution board?
Any help and i will be very grateful, as ive never worked on a site this size and am pretty much lost in regards to what i can and cant do,
thanks