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Discuss earthing of steel trunking in the Commercial Electrical Advice area at ElectriciansForums.net

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hi guys just bare with me please still learning lol! if i have connected my steel trunking to the metal frame work via bush and cuplin and and the steel frame is earthed and i can prove continuity from my trunking to the steel work do i still need to earth my steel trunking and also do i need fly links to my lid thanks in advance 🙂
 
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Risteard

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It's an exposed-conductive-part and therefore must be earthed. Don't rely on a fortuitous connection with a steel structure bonded to the MET.
 

davesparks

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No you don't need a flylead to each trunking lid.

And I wouldn't normally earth the trunking seperately if it is bolted to the DBs and numerous other earthed metal objects.
 

Risteard

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Agree with Dave sparks on this one as should be well fixed with bolts to the DB with a Paxlin segregation between.
Yes, agreed also. I had read the OP as being fixed to structural steel.

Personally I would use copper links between lengths of trunking because it's the accepted practice here (even though they're not cheap).
 

davesparks

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Yes, agreed also. I had read the OP as being fixed to structural steel.

Personally I would use copper links between lengths of trunking because it's the accepted practice here (even though they're not cheap).
I have never seen the point, you fix the lengths together with steel plates then add a tiny bit of copper under two of the screws.
 

Risteard

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I have never seen the point, you fix the lengths together with steel plates then add a tiny bit of copper under two of the screws.
Yes, but most specs here will demand them.
 
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