UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

Oldcodger · 31st Jan 2018, 11:20 pm

3rd rail is a rail close to a running rail and constantly powered at 650vDC. The fourth rail is a rail in the middle of the running rails ( referred to as the "four foot"). I've heard several tales of when this rail is live. But the consensus of opinion on all NR courses I've been on was to treat as live, as it depended on trains/UG in section.

31st Jan 2018, 11:20 pm	#44
Oldcodger Nonode Join Date: Oct 2014 Location: West Midlands, UK. Posts: 2,181	Re: Earthing of phone lines 3rd rail is a rail close to a running rail and constantly powered at 650vDC. The fourth rail is a rail in the middle of the running rails ( referred to as the "four foot"). I've heard several tales of when this rail is live. But the consensus of opinion on all NR courses I've been on was to treat as live, as it depended on trains/UG in section.