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Class 73/0 jumper cables

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robertclark125

robertclark125

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On the first batch of class 73s, which were the 73/0s, they had an extra jumper cable, which the 73/1s didn't have. The jumper cable was a high level one, not a blue star one. So, what was the extra jumper cable for, and if two 73/0s were in multiple, did both jumper cables have to be used?
 
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Phil.

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Cant think of this one, do you have photographs? I have no recollection of the 73/0s and 73/1s having differing ends.
 
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dubscottie

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They indeed have a extra set of jumpers. I think it was to provide light to pre 1951 SR stock.. The 4-CEP seemed to have the same.
 
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JohnElliott

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The first EPBs had a 750v power bus line in that position -- could this be what it's for?
 
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Phil.

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JohnElliott said:
The first EPBs had a 750v power bus line in that position -- could this be what it's for?
Click to expand...

Are you sure about that? You're not thinking of the wonderful SUBs are you?
Looking at pictures (I found a couple) of 73/0s front ends the additional jumper is definitely the standard S.R. 27 pin one.
I'll see if I can get hold of an old Woking driver that I know. He may be able to shed some light on the puzzle.
 
507 001

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I've done quite a bit of research on JAs for modelling purposes (some of them ended up in Merseyside, as I'm sure most of you know).

As far as I could find out it was simply a duplicated standard 27 pin Jumper. It was done away with on the JBs as it was more or less pointless.
 
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Phil.

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Yep, further to the above that is indeed the answer as I've now discovered.
 
Smudger105e

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The 750v socket on the front of the EPBs was for shed supplies where no 3rd rail was available. Never used to multi vehicles.

The second jumper on the JAs was in a different orientation to the EMU 27 way jumpers. As i said i am 95% sure they were for coupling to the DEMUs.

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JohnElliott

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Phil. said:
Are you sure about that? You're not thinking of the wonderful SUBs are you?
Click to expand...

I'm going by David Brown's "Southern Electric - a New History", which says that the EPBs originally had the power connector, but it was found not to be useful not to mention dangerous to staff, and was removed. IIRC there was a picture showing an EPB with the connector in place, with conduit running across the front of the cab to it from the depot power socket.
 
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contrex

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There is a rather fuzzy picture of 5001 at the SERA website; you can see a kind of conduit going across the front just under the windows and headcode. Could that be the conduit you speak of?

http://www.emus.co.uk/zone/southern/5001.jpg

Also the Tyneside emus which went to the SR as 2-EPBs seemed to have that same thing

http://www.emus.co.uk/toon62.jpg

I think both the BR standard unit on the left of this picture and the SR type on the right had this too?

http://i176.photobucket.com/albums/w174/robertcwp/Units/2EPB_5707_CX_s.jpg
 
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Clip

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Smudger105e said:
So, guys, how did the EPBs get moved out of depots where there was no third rail (eg. when over a pit).

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Click to expand...

Shore supply(unless thats a relativly new thing) or a shunter of some sort I would guess
 
Smudger105e

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Clip said:
Shore supply(unless thats a relativly new thing) or a shunter of some sort I would guess
Click to expand...
Indeed a shore supply, which plugs into the power recept under the SMS window.

The items that were removed were the power jumpers. The power recepts were always fitted on powered vehicles. 1963 stock (VEPs CIGs etc) had the recepts on each end of the motor coach, hence nobe on the nose ends of the driving vehicles.

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