Hypothetical question

[jdd]

If you had a steel framed building with the electrical service at one end and the gas/water service at the other end. Would it be possible to bond the steel as normal, but then just bond the gas/water service straight to the steel work, instead of taking back to the MET.

 

[JD6400]

I believe that would be a no !

 

[Johnuk]

no u can not

 

[nickblake]

if you went from the met to the steel then gas then water with out cutting the cable so it was a continuous piece then it would be ok

 

[jdd]

What if the steel was used as the means of earthing?

 

[telectrix]

think OP meant could he go from MET to local structural steel, then use that steel to extend bonding t#other end of building, then tap onto gas and water. i think that's a no-no due to the resistance of the steel, possible corrosion, and a few others i can't think of. it's saturday and well past beer o'clock.

 

[jdd]

Mmmmmmmmm... Thanks for the info. Purely hypothetical.

 

[Sparkystu79]

I believe this is permitted, don't know the regs or any particular conditions which have to be met but when I worked for my old company there was certain occasions when this was done on large steel frame structures.

 

[jdd]

I seem to have read something similar, but it involved the structural steel being used as the means of the earthing (eg. steel being used as a big earth rod.)

 

[Guest123]

Yes you can.

543.2.1 refers.

There are considerations to made though, see the above reg.

 

[MarkieSparkie]

Extraneous-conductive-part(s) (your buildings steel frame work) may be used as productive conductor(s) providing the conditions of BS7671:2008 Amt 1:2011, 543.2.6 are met. This is quite commonly applied in both commercial and industrial installations, using building structural steel and other extraneous conductive parts too reduce the amount of green/yellow bonding conductor that needs to be run.

 

[Knobhead]

Never had a problem bonding to this little lot
View attachment 12940
Your MFT wouldn't even give a reading for the earth retutrn path. We used a Ductor to test continuity .0005 ohm would be normal.
Addional CPC's weren't entertained.

PS my workshop is in the foreground
View attachment 12941

 

[Dean Williams]

in my last company we always did it like this, especially in very large factories.

 

[Silly Sausage]

View attachment 12940


PS my workshop is in the foreground

You had a mobile workshop, genius, drive it to where ever you need it.

 

[Knobhead]

Great for carrying tools around but not practical, it wouldn’t fit in the lifts!

For working on the quarry navies we had a mobile workshop in the back of a 5 ton Tames Trader wagon. It could be linked up to the 3.3KV or 440V as available.

The nearest brick building was my workshop. A no go area unless you were invited in.