Hi James,
The connection from the incoming mains supply (from the substation) at my meter and CU downstairs. From there, the armoured cable in question runs along the side of the house, through the wall on the outside, and into my listening room upstairs, where it meets the junction box, powering my system.If one end of your 25mm armoured is to your hifi, what is at the other end of the armoured cable?
I trust that the set-up I have in place is clearer now
I should also mention that all my mains leads are fitted with fused 13A plugs, as is all my equipment fitted with its internal case fuse(s). The dedicated mains supply feeding my hi-fi system is also shut down, when I'm away for any length of time, and the system disconnected.
Marco.