Then if they're ordinary insulated & sheathed tails, they'd need to be protected by earthed steel conduit, or earthed steel trunking suitable for use as a protective conductor (so that option's out for TT systems) (steel capping isn't acceptable) - or have mechanical protection sufficient to stop nails, screws etc. (in these days of nail guns, that's pretty difficult to demonstrate).
Then if they're ordinary insulated & sheathed tails, they'd need to be protected by earthed steel conduit, or earthed steel trunking suitable for use as a protective conductor (so that option's out for TT systems) (steel capping isn't acceptable) - or have mechanical protection sufficient to stop nails, screws etc. (in these days of nail guns, that's pretty difficult to demonstrate).
