Do the regulations permit the use of copper pipe as conduit for twin and earth cable ?
A friend is being told by an electrian that the replacement 10 mm cooker cable cannot be run in the copper tube ( 28 mm diameter ) that the damaged cable is run in. ( damage is elsewhere and the full run is being replaced) I would think that provided the pipe is bonded the rules for steel conduit would apply.
I have just tried 10mm cable in 22mm pipe and it looks like it is within the 45% limit. So 28 mm pipe would have plenty of free space.
A friend is being told by an electrian that the replacement 10 mm cooker cable cannot be run in the copper tube ( 28 mm diameter ) that the damaged cable is run in. ( damage is elsewhere and the full run is being replaced) I would think that provided the pipe is bonded the rules for steel conduit would apply.
I have just tried 10mm cable in 22mm pipe and it looks like it is within the 45% limit. So 28 mm pipe would have plenty of free space.