Deleted
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Post by Deleted on Aug 27, 2012 17:09:31 GMT
Hi all,
I was recently given a cab ride on an S Stock. Video here:
When I was there I remember seeing some yellow type plugs in the top of the tunnel. I imagined these would be for engineers but they look more like cable runs that along the top of the tunnel. Surely though that would be a lot more dangerous than if a clip fell from the wall?
Thanks to the driver for the ride too!
Cheers
Jason
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Deleted
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Post by Deleted on Aug 27, 2012 17:36:24 GMT
Jason
From my recollection they are for 110v power supplies which most professional power tools work from. I assume they have permanently installed the power supply to speed up the time it takes for engineers to start and finish work as they don’t need to deploy endless numbers of power cables. From my days – finding a suitable place to tap into the 240v, install a transformer and so on, took up time.
I would also expect it regulates the places that engineers can draw power from as they will not have access to switchrooms without permission.
Dean
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Fahad
In memoriam
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Post by Fahad on Aug 27, 2012 23:05:10 GMT
Very interesting, I'd always assumed it was to make it harder for the regular punter to charge their phone from one  |
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Post by 1018509 on Aug 28, 2012 11:24:08 GMT
Very interesting, I'd always assumed it was to make it harder for the regular punter to charge their phone from one At delivery the 73 stock had a metal standard 13amp socket under one of the cross seats - maybe every car - I never checked - pity very few people had mobile phones in them days. I don't think the sockets survived refurb.  Come to that each car had a VHS recorder too - I know because I removed most of them - wonder where they went. |
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Fahad
In memoriam
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Post by Fahad on Aug 28, 2012 11:39:44 GMT
Was that for the in-car CCTV?
There are standard BS1363 sockets in the saloon of an LO 378, of course. Wonder what the official use for those is
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Post by causton on Aug 28, 2012 13:40:17 GMT
Was that for the in-car CCTV? There are standard BS1363 sockets in the saloon of an LO 378, of course. Wonder what the official use for those is Usually officially for cleaners in most mainline stock I believe  |
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Ben
fotopic... whats that?
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Post by Ben on Aug 28, 2012 16:56:21 GMT
Why were ES sockets prefered to bayonet fittings? Always found the screw plugs want to unscrew as the flex wants to untwist
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Post by Dstock7080 on Aug 28, 2012 19:36:25 GMT
Ben, is that a serious question?  Think about it, think how many thousands of 240v bulbs LT required for its 240v tunnel lighting and equipment room lighting etc and then wonder what percentage of those would be lost to pilfering if they had the same BC fittings as normal domestic bulbs! Nothing wrong with ES fittings and the ES plugs on our transformers were built much like motors, that is they could rotate endlessly without twisting the flex at all! Didn't LT also use 3-pin plugs/sockets but with the pins rotated through 90° for similar reasons? |
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cso
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Post by cso on Aug 28, 2012 20:09:08 GMT
Doesn't a 180 degree roation mean the pins are the same way anyway...
I know some shops and venues use plugs with the Earth Pin rotated 90 degrees to stop normal plugs being plugged in...
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Post by Dstock7080 on Aug 28, 2012 20:23:30 GMT
Doesn't a 180 degree roation mean the pins are the same way anyway... I know some shops and venues use plugs with the Earth Pin rotated 90 degrees to stop normal plugs being plugged in... Yes! quite right 90° , post modified. |
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Deleted
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Post by Deleted on Aug 28, 2012 21:27:11 GMT
Ben, is that a serious question? Think about it, think how many thousands of 240v bulbs LT required for its 240v tunnel lighting and equipment room lighting etc and then wonder what percentage of those would be lost to pilfering if they had the same BC fittings as normal domestic bulbs! For the same reason the NY Subway had ES bulbs & fittings (standard that side of the Atlantic), but which screwed the opposite direction to normal. |
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Ben
fotopic... whats that?
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Post by Ben on Aug 28, 2012 22:28:11 GMT
Ahhhh, but I didn't say the regular domestic BC  On a tangental question, were the ES caps of the type that is popular in the States (and sometimes seen over here), or of the reverse screw type, as etr220 mentions? The 13amp with rotated pins was designed by Walsall Gauge; so recons the internet. |
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Deleted
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Post by Deleted on Aug 29, 2012 8:11:32 GMT
Several years back during engineering hours, we set off to make a station staff track familiarisation film in the tunnel north of Hampstead.
To set up the lights, I needed to unscrew the tunnel light bulb to fit in our more powerful temporary lights. Unfortunately the bulb was red hot and I had no gloves. So using a spare Hi-Vi as a large pair of oven gloves, I started to unscrew the bulb. While at the same time standing on the discharged current rail and keeping my balance by holding the tunnel wall.
As soon as I started to unscrew the bulb, that section of tunnel went dark. So while someone was scrambling to position the torch towards where I was working, I inadvertently touched the bare metal surround of light bulb –WHACK! 240v shot down my arm.
Lesson learned – the outside metal edge of an Edison screw fit bulb is live! And at least everyone else enjoyed it.
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Post by Dstock7080 on Aug 29, 2012 20:07:08 GMT
No that is not correct. The three pin 'square' plugs and sockets that you refer to were line/neutral/line rather than line/earth/neutral and had fuses in both line connections My apologies, my memory must be failing with increasing years. Perhaps it was another application outside LT where I saw them. |
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Post by caravelle on Aug 30, 2012 1:40:22 GMT
As soon as I started to unscrew the bulb, that section of tunnel went dark. So while someone was scrambling to position the torch towards where I was working, I inadvertently touched the bare metal surround of light bulb –WHACK! 240v shot down my arm. Lesson learned – the outside metal edge of an Edison screw fit bulb is live! And at least everyone else enjoyed it. That really shouldn't have happened. I don't know if it's common practice on LU but for home installations it must not be done. For safety reasons the live should be the center "dot" and the screw the neutral as it's very easy to touch it and have a "deansullivan" experience. In the worst case scenario where the installation is not protected with a differential circuit breaker/switch and your hand "claws" the bulb you might even end up dead. Of course ordinary users should change a bulb with the light switch in the "OFF" position... ;D |
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Post by bassmike on Aug 30, 2012 3:02:43 GMT
I agree you always connect an ES holder with the neutral to the screw section.
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Post by caravelle on Aug 30, 2012 11:13:44 GMT
Thank you for your explanation. I had really no idea of that problem.
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bowchurch
The next train on Platform 2 is the District Line to...
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Post by bowchurch on Sept 2, 2012 19:52:51 GMT
LT used two types of 55v plugs and sockets, the three 'square' pin made by Walsall and supplied in both yellow and white I've worked in places with Walsall guage outlets, it's to stop unauthorised equipment being plugged into the 'clean' technical supplies that are backed by UPS and genny. I've seen these in more modern installations, although most buildings put the technical mains on BS4343 connectors now. Granted they are a lot more common, but they are different enough to stop a hoover getting plugged in to one by accident. |
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Deleted
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Post by Deleted on Sept 4, 2012 20:04:37 GMT
Thanks for the responses guys! Also noticed them on the Northern Line in a drivers eye view video I've got!
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Think about it, think how many thousands of 240v bulbs LT required for its 240v tunnel lighting and equipment room lighting etc and then wonder what percentage of those would be lost to pilfering if they had the same BC fittings as normal domestic bulbs! Nothing wrong with ES fittings and the ES plugs on our transformers were built much like motors, that is they could rotate endlessly without twisting the flex at all!
