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Topic Title: "Type of wiring"
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Created On: 29 October 2007 05:13 PM
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 29 October 2007 05:13 PM
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Smith249

Posts: 362
Joined: 09 September 2004

On an EIC, theres a tab for "Type of wiring" does this refer to weather its T&E or singles or does it refer to the way in which it's installed, i.e T+E clipped direct?

What would go in the box if it was T+E and what would go in the box if it was singles in conduit?

Thanks.
 29 October 2007 05:20 PM
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rocknroll

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Joined: 03 October 2005

Type of wiring.

PVC/PVC = T&E
PVC
SWA/PVC
SWA/XPLE

etc; etc;

And now for something I did earlier, if you are using the IEE forms why not use this one for your test results, gives a little bit extra info; I know it looks similar to the ones we use from an excellent provider of which I am a member but they are slightly different.

http://uk.msnusers.com/SparkyH...FTest%20Results-1.doc

regards

-------------------------
"Take nothing but a picture,
leave nothing but footprints!"
-------------------------
"Oh! The drama of it all."
-------------------------
"You can throw all the philosophy you like at the problem, but at the end of the day it's just basic electrical theory!"
-------------------------

Edited: 29 October 2007 at 05:34 PM by rocknroll
 29 October 2007 05:31 PM
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OMS

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There is no tab on an EIC for type of wiring other than for Main Protective Conductors.

There may be a code system adopted on the accompanying schedule of test results but these are not a requirement of BS 7671 - usually they appear on several organizations versions of an EIC Schedule.

From memory, NICEIC for example use the following codes:

A - PVC/PVC Cables

B - PVC Cables in metallic conduit

C - As above in non metallic conduit

D - as above in metal trunking

E - as above in non metallic trunking

F - PVC/SWA

G - MICC

Regards

OMS

-------------------------
Failure is always an option
 29 October 2007 06:30 PM
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Stumorri

Posts: 35
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Hi, just an observation (but noticed this on 2391 tutors notes as well). Column 15,16,17 are incorrectly identified (I think) and should be r1, rn, r2

i.e. lower case for end to end resistance of ring, upper case when its an effective impedance path.

I assume the mafia style certs have correct identity?

Not being pedantic, just it does trip people up.

Could be wrong, any thoughts?

Stuart
 29 October 2007 08:50 PM
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loftyloo

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same as some sheets require no. of points others dont...






lofty
 30 October 2007 07:23 AM
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normcall

Posts: 8143
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Isn't life complicated.
Yesterday I even had a ECA guy telling me that I had to be Part P registered to do electrical work and wouldn't believe me when I said that Part P was part of the building regulations and doesn't even require adherence to BS7671.
Then started to tell me that in his town (over the hill about 5 miles away) most sparks are not registered and they don't even test their own work. My eyes started to glaze over at that point and I made by excuses and left.

-------------------------
Norman
 01 November 2007 01:28 PM
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Stumorri

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Urm, how do I contact neilr10 then? Haven't tried private mail thingy........

Was going to start another post but cheekily tag it onto this one; very old brown MCBs on TPN board in a pub, what BS number are they likely to be, and thus what max Zs figures? Also, would it be legit to suggest board change to enable RCBOs for certain circuits? If yes what code would I use?

hmm..........

Thanks

Stuart
 01 November 2007 02:50 PM
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normcall

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'Old brown mcb's' - sounds like Crabtree C50 range and still available.

-------------------------
Norman
 01 November 2007 03:54 PM
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Stumorri

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Hi Normcall, thanks for info, do you know if there is any way of retro fitting RCBOs to these boards? No spare ways with 30A showers in 3 guest rooms, numerous socket outlet circuits including split ring with 20A cb.

Do you know where to find max-Zs figures?

thanks (in anticipation)

Stuart
 01 November 2007 04:22 PM
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normcall

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Never seen a RCBO in the C50 range.
Try the crabtree site just in case and that should give the technical data as well.
They were introduced in the 70's initially for 3 phase boards (when the likes of Bill/MEM still had little bits of fuse wire) and brought in the 'domestic' range shortly after (I have one in my wee bungalow!).

-------------------------
Norman
 01 November 2007 04:40 PM
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John Peckham

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Norm

I had not seen a C50 RCBO unti about 2 months ago when I was walking around a boot sale. A bloke had a box on new/unused ones. I asked how much as I wanted one for my colection of strange odds/sods. 50p and it was mine wished I had brought a few more at that price.

John Peckham

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John Peckham

http://www.astutetechnicalservices.co.uk/
 01 November 2007 04:52 PM
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normcall

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That's wot I like about this site, you always learn something new everyday.
Is it DP or SP, does it have a single neural wire or two?
Just curious, as it must have been/be way ahead of it's time. Must confess, I always used to used Crabtree stuff as they do everything from 3 phase to all wiring accessories, but the local stockist stopped doing them and the new one doesn't keep a lot of the range (price maybe?).

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Norman
 01 November 2007 05:10 PM
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John Peckham

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Just metered it. Single pole with 2 neutrals. BS4293 4.5kA rated In 15A 30mA C50 RCCB with a BS3871 Type 2 breaker.

If anyone is interested I could photograph the rare beast if they want to put it on Sparky Heaven.

-------------------------
John Peckham

http://www.astutetechnicalservices.co.uk/
 01 November 2007 05:55 PM
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ebee

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Bring it on John

-------------------------
Regards,
Ebee (M I S P N)

Knotted cables cause Lumpy Lektrik
 01 November 2007 06:30 PM
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John Peckham

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I bet everyone out there is thinking I bet old JP is bullls***ing. They have never seen one, and Old Norm has never seen one so he must be having us over!

John Peckham

-------------------------
John Peckham

http://www.astutetechnicalservices.co.uk/
 01 November 2007 07:20 PM
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normcall

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I believe you, honest.
It just goes to show I haven't seen and done everything - yet!

-------------------------
Norman
 01 November 2007 07:22 PM
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ebee

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Oh yes you have!
LOL

-------------------------
Regards,
Ebee (M I S P N)

Knotted cables cause Lumpy Lektrik
 01 November 2007 08:38 PM
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John Peckham

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Thanks to Ebee the rare beast can be seen on Sparky Heaven.


John Peckham

-------------------------
John Peckham

http://www.astutetechnicalservices.co.uk/
 02 November 2007 06:51 AM
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normcall

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Had a look John, it looks like one of their hybreds of combining standard components, in this case a C50 and adding a 'bit'.
A bit like their 500mA RCD which is just a E60 with an amplifier to detect and amplify the inherent current inbalance of the ELCB.
I take it you don't want the one I have as you got one nearer.

-------------------------
Norman
 02 November 2007 07:40 AM
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Stumorri

Posts: 35
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Incredible, I wasn't expecting to see one of those!

However this now raises bigger challenges!
a) where can i buy some?
b) How do I fit them into a full board?
c) Which circuits are highest priority, Showers, Sockets or metallic fixed kitchen equipment!


Oh and can I take it that c50 cbs are 3871 type 2 for Max Zs tables (2D) ?

Renewed optimism,

thank you all (esp JP)

Stuart
IET » Wiring and the regulations » "Type of wiring"

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