Maximum Track Circuit Length

[PJW]

Assuming I'm signalling a layout with Track Circuit Block working and Track Circuits (not Axle Counters), what would be a reasonable maximum TC length to assume in the exam (for plain line sections, long signal spacing).
I'm thinking somewhere between 600m and 1000m - any advice please?

Not sure why you would be worrying about the physical length of the electrical sections of the individual track circuits for module 2. What PJW writes is all true for the physical constraints (any a typical thing to consider in detail for mod 5), but for the detail shown in module two, you are showing the length of the functional section. Yes, on a real scheme plan, you would show xx/1, xx/2 etc, but for the module 2 paper, I am not sure that anything other than a note saying that "long" sections may be made up of multi section tracks will gain you much credit. To be hones, I have never asked that question of anyone involved. Does anyone have direct experience of that point?

Peter

Who knows how the examiners score the layout?
I agree that getting sensible track layouts is not the most crucial element of the paper, but we do know that they do award marks for SAFETY, OPERABILITY and ECONOMY and I believe in that order. If the layout is not basically safely signalled (i.e. an individual error won't be fatal but too many certainly will be) then it will not pass, if the layout can't achieve the operational moves and train frequencies etc. then it it may not pass, if far too much signalling is provided then it won't score a Credit.
Track circuit lengths most distinctly are the "icing on the cake" but elements like this could well be the difference between Credit and Distinction. Dorothy achieved a Credit last year in mod 3 and has thus set herself a standard to achieve in mod 2 this year!