- Reaction score
- 2,089
Protective conductor then.You don't use adiabatic to calculate bonding.
Discuss Calculate bonding sizes TT in the UK Electrical Forum area at ElectriciansForums.net
Protective conductor then.You don't use adiabatic to calculate bonding.
What would the minimum bonding size be? (2mm therefore 4mm wiring?)
exactly then halved = obv not 2mm as I stated.Protective conductor then.
That's for bonding conductors, o/p is asking about main earth to a rod.As per 544.1.1 the minimum size is 6mm
No they aren't, the thread title is about bonding size and the only question in their post is:That's for bonding conductors, o/p is asking about main earth to a rod.
542.3.1
What would the minimum bonding size be? (2mm therefore 4mm wiring?)
exactly then halved = obv not 2mm as I stated.
Guess I'm trying to understand how we can calculate the main earthing conductor size then half that for bonding.
Was trying to understand the way it could be calculated, I know the regs say 6mm FYI.
Maybe I worded things not too great...
Right at the start of his post he said "4mm earth to earthing electrode (rod) Ra 42ohm"No they aren't, the thread title is about bonding size and the only question in their post is:
Why ?No, i ai'nt got confused, what I am asking is because you cant use the adiabatic equation for the main earthing conductor
Half the size of the Main earththen what formula result makes the bonding size acceptable. Instead of just using the regs as 6mm minimum how can we measure the acceptability of the bonding size? ie if the ze was less than 1 then the 4mm main earth wouldnt be large enough then that would increase the bonding size respectively.
YesGuess maybe the 6mm bond would always suffice in a TT system with the expected fault currents?
No, i ai'nt got confused, what I am asking is because you cant use the adiabatic equation for the main earthing conductor then what formula result makes the bonding size acceptable.
Reply to Calculate bonding sizes TT in the UK Electrical Forum area at ElectriciansForums.net
We get it, advertisements are annoying!
Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.