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Topic Title: 25mm swa
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Created On: 12 February 2013 08:35 PM
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 12 February 2013 08:35 PM
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frspikeyhead

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Joined: 27 December 2004

Just been reading a couple of past threads and threads on another forum about moving CUs using 3 core 25mm swa and how to make of the swa into the plastic CU. There seems to be a whole consortium of ideas but one thing I have noticed is that no one seems to have mentioned how to terminate a 25mm core into the earth bar on a domestic board??????
 12 February 2013 08:48 PM
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peteTLM

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You dont, you lug the cpc and bolt it to the metalclad board, or if plastic, you bolt it to the 6x6 galv box that you are glanding it to, and using a 16mm flylead to get it to the earth bar ( via a 32mm bush between the galv box and plastic box).

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 12 February 2013 08:50 PM
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daveparry1

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I guess you're saying the holes in the earth bar are not big enough for the 25mm conductor? If there's enough metal available drill one of the holes out a bit, otherwise split the strands and put two in one hole and three in the adjacent hole. I have done that once or twice when fitting 16mm into those old skeleton type c/units,

Dave.
 12 February 2013 09:03 PM
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frspikeyhead

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Sorry but am trying to watch the celtic game and type at the same time. I cannot multi task. I don't think I've ever lugged one of the cores and then put a tail to that before. May be am old fashioned but I don't like the idea of introducing more breaks into the earthing cable. Usually split and twist but that can be a pain in the ***** when the board is already pretty full.
 12 February 2013 09:12 PM
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Jobbo

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The use of a pin terminal lug allows the use of larger conductors into smaller holes.

Regards

Jobbo
 12 February 2013 09:14 PM
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frspikeyhead

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I think Celtic could do with a pin terminal lug at the moment.
 12 February 2013 09:20 PM
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frspikeyhead

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Just out of interest where can you get 25*16 terminal pins.
 12 February 2013 09:22 PM
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slittle

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Certainly not Eddy's at Chelmsford. We've tried before


Stu
 12 February 2013 09:53 PM
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Jobbo

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Lockwell Electrical. Not sure where you are based, but we use a branch in Wickford Essex.

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Jobbo
 12 February 2013 10:07 PM
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slittle

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Yes, I've used Lockwell in Wickford before for odd control bits.

We don't have an account there but when I've been stuck a quick phone call has normally saved me.

I had an interesting conversation with the buyer in eddies at Chelmsford this morning. He was telling me that they hold over £3 million in stock lines.....He wasn't quite so impressed when I told him that was really interesting but they actually needed to keep stock lines that we used :-)

Stu
 13 February 2013 11:20 AM
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frspikeyhead

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Yeah, there is a Lockwell not far from here, I will give em a call. Thanks
 13 February 2013 01:33 PM
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Jaymack

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What would be the thermal rating of the "16"?

Regards
 13 February 2013 01:59 PM
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AJJewsbury

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What would be the thermal rating of the "16"?

Hopefully at least as good as the 16mm2 earthing conductor. In any event it's probably no worse than what the CU manufacturers seem to use to make their internal connections on "17th Ed" CUs these days
- Andy.
 13 February 2013 07:10 PM
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tattyinengland

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How about an external earth bar? I like them, especially in this case when the 25mm core needs terminating properly.
 13 February 2013 08:01 PM
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slittle

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Originally posted by: tattyinengland

How about an external earth bar? I like them, especially in this case when the 25mm core needs terminating properly.


Tricky with SWA I find.

Stu
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