running cables on a concrete floor

[stillp]

 

[RF Lighting]

power pole?

Doesn't solve the problem of chasing the floor, though!

Why would you need to?

Get the long one, install it floor to ceiling and feed it from above. No need to chase the floor at all then.

 

[ban-all-sheds]

Do you know what the protective conductor current of the treadmills is? They might need high integrity earthing, in which case a 13A socket is not much use.

Why not?

 

[RF Lighting]

If the protective conductor current exceeds 10mA for one piece of equipment then a BS 60309-2 plug / socket must be used.

I find it hightly unlikely that a treadmill would exceed this current, and even less likely that the manufacturers would supply their equipment with BS 1363 plugs if this were the case.

 

[stillp]

RF, thanks for the comment re the BS EN 60309 connector.

In an ideal world I'd agree with your other points, but sadly some manufacturers are not aware of their responsibilities. When I spoke to the supplier of treadmills with > 10mA PCC they couldn't see what the problem was!
Incidentally, the problem was discovered when these machines were about to be installed in a council gym, and the county "electrical engineer" insisted on PAT testing them, and of course they failed the leakage current test, which he interpreted as meaning they were faulty. They were eventually hard-wired via FCUs, because the gym manager said the 60309 connectors looked "too industrial" for a gym.

 

[RF Lighting]

Were the circuit and sub circuit specifically designed for high PCCs?

 

[stillp]

I can only hope so. I wasn't involved in the final installation.

I'm not an electrician, so perhaps you could educate me - how would you design the circuit differently for a high PCC?

 

[RF Lighting]

There's a whole section in BS7671 specifically about special installations for circuits supplying equipment with high PCCs


There's also some light reading about them

here

and

here