tt earthing conductor& bonding sizes

[soulman]

hi, What is the standard size earthing conductor and bonding conductors you guys use for tt. The chap i work for uses 10mm for earthing conductor and 6mm bonding, the guy i used to work for used 16mm and 10mm for bonding.

cheers

 

[paul b b]

I always use 16 and 10.

If its up/down graded to a tncs they will be the correct size

 

[Zeespark]

Use the adiabatic equation.

AndyGuinness

 

[steptoe]

you can use 10/10 to be safe,

personally I normally use 16/10 just for that extra little bit of help on the resistances,

 

[kme]

So do I - There isn`t a hard & fast rule; the OSG has a table in the back for sizing these conductors - there`d be no need of it if there was a "one size fits all" solution. It depends on circumstances.

KME

 

[Sidewinder]

you can use 10/10 to be safe,personally I normally use 16/10 just for that extra little bit of help on the resistances,

TBH I normally use 16/16 as it's only one to carry and as you say helps with the R & you are then well safe!

Also within the Spec Loc req. I get involved with & I don't mean our beloved Specs!

 

[nsbs]

I tend to use 16/16 as well.

 

[Evans Electric]

TT systems

10mm bonding

10mm to earth rod.