Conveyor earthing/bonding

[Mr S. Parks]

Hello.
On paper I'm a fairly well qualified electrician but lack some experience of this stuff.
Got a large flat bed roller conveyor system(perhaps 40/45, 3m sections) that I look after just now.
240v, rcd protected in main control panel.
Most all bolted to concrete slab and mechanically coupled together but, 9 portable sections are not and sit on rubber wheels.
These 9 portable sections "but"up against main conveyor so operatives can load(and touch main conveyor). And are connected via 240v commando type plug/sockets. Section are made of steel.
Should these portable sections be bonded to main conveyor Or just rely on CPC incase af a fault?

Hope above makes sense. Cannot find any reg but my background more bs 7671.

Thanku o' learned colleagues

 

[James]

I would consider the portable section to be a machine in its own right.
Therefore it’s protection comes from the cpc.

 

[westward10]

The cpc of the connecting cable should be adequate.

 

[Mr S. Parks]

Hi James an westie thanks for replies.
Wish I'd also added my concerns with bonding.
With any of the above 9 conveyors (mounted on insulated wheels) being within touching distance of so much earth and earthed conveyors should these 9 also have their chassis bonded to earth?
Under certain(highly unusual) fault conditions the chassis could remain live until a operative touches it and, very likely, another conveyor or earth itself. Or would that introduce some problem that I've not thought of?

 

[loz2754]

There is no particular requirement to bond such apparatus. Unless any part of it can bring an earth potential into the equation.

 

[Mr S. Parks]

Thanku loz