"Andrew Gabriel" wrote in message
.. .

Really you want Andy for this, but the 5kA sounds wrong to me.

Supply impedance for 6kA PSC is 240 / 6000 = 0.04 ohms.

Yup, agree that.

Add to that the 0.5m of 2.5mmsq T&E, which will have a
resistance of 0.09 ohms,

I don't get that - 90 mOhm.
I think it's more like 7 mOhm.

Cheers,

Will