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D for Green

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D for Green

Unread postby bob.the.train » Sun Jul 23, 2017 5:50 pm

Hello All,
Does anyone know why we use D for Green and H for Yellow? TIA
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Re: D for Green

Unread postby Fast Line Floyd » Sun Jul 23, 2017 7:29 pm

bob.the.train wrote:Hello All,
Does anyone know why we use D for Green and H for Yellow? TIA

Distant and Home simple as that.
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Re: D for Green

Unread postby baconandeggs » Mon Jul 24, 2017 4:47 am

bob.the.train wrote:Hello All,
Does anyone know why we use D for Green and H for Yellow? TIA


This was discusssed on this forum some time ago. I may have started that earlier thread :D

D & H are part of an apparatus naming convention. The convention used in NZ is

http://valleysignals.org.nz/petone/apparatusnames.html

I recall that someone on this forum said that this was similar (or the the same as) BS ????. I was somewhat surprised by this as NZ followed North American automatic signalling practice. I am sure that there is someone on his list who can clarify things.
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Re: D for Green

Unread postby baconandeggs » Mon Jul 24, 2017 4:56 am

baconandeggs wrote:I recall that someone on this forum said that this was similar (or the the same as) BS ????. I was somewhat surprised by this as NZ followed North American automatic signalling practice. I am sure that there is someone on his list who can clarify things.


I was worried that someone would tell me not to be lazy and to search the forum :D

I did - have a look at the thread " Logic of circuit letter Nomenclature" viewtopic.php?f=6&t=5889&p=59447#p59432

The standard is BS 376 part 2.
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Re: D for Green

Unread postby JRB » Mon Jul 24, 2017 2:00 pm

This is one area where British & US practice overlap.
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