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by SMOKEYBOB - 02/15/21 04:59 PM
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Uk 'Imperial' cable Q
#169240
09/29/07 12:34 PM
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Joined: Sep 2007
Posts: 2
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Hi, Searched high and low. Could someone please verify the following 'Imperial' 'stranded' cable conductor dimensions. Uk circa 1968, 1966 14th Edition I believe. 2+E PVC insulated & Sheathed. Particularly the CPC values. -------------------------------------------- Phase : 7 x 0.029" diam. CPC : 3 x 0.036" diam. Is this correct? or was the CPC 3 x 0.029" If it isn't too much trouble, could someone please check by reference?
I have measured the old stuff using micrometer, but unfortunately mislaid the notes for this cable. I am sure CPC was 3 x 0.036" but have been thrown by some possibly vague posts elsewhere on the web.
Many thanks, Jak
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Re: Uk 'Imperial' cable Q
[Re: jak]
#169333
10/02/07 04:01 AM
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Joined: Sep 2007
Posts: 2
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Ok, sorted. Found more cable, accurately measured diameters of cpc 0.036" x 3 strands equates to 1.98mm² CSA. -
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Re: Uk 'Imperial' cable Q
[Re: jak]
#169364
10/03/07 05:31 AM
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Joined: Aug 2001
Posts: 7,520
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Hello jak, and welcome to the forum. I'm pretty sure that the 13th and/or 14th editions had a table showing the ECC (Earth Continuity Conductor, the then-current term) sizes for T&E cable. I'll try and find it later and scan. We already have this table of Imperial cable current ratings from the 14th edition on the site, but it doesn't include ECC/CPC sizes: https://www.electrical-contractor.net/pc/IEE1966_T3.JPG
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Re: Uk 'Imperial' cable Q
[Re: pauluk]
#169371
10/03/07 08:51 AM
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Joined: Aug 2001
Posts: 7,520
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Re: Uk 'Imperial' cable Q
[Re: pauluk]
#174327
02/01/08 08:59 PM
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Joined: Jul 2007
Posts: 19
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7/029 was imperial equivalent of 2.5mm 7/036 was imperial equivalent of 4.0mm
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Re: Uk 'Imperial' cable Q
[Re: iansettle]
#174469
02/05/08 05:41 PM
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Joined: Aug 2001
Posts: 7,520
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The full range of smaller Imperial sizes for current-carrying conductors, with metric equivalent to two decimal places:
1/.044 = 0.97 sq. mm 3/.029 = 1.29 3/.036 = 1.94 7/.029 = 2.90 7/.036 = 4.52 7/.044 = 6.45 7/.052 = 9.35 7/.064 = 14.52
And to one decimal place:
19/.044 = 19.4 19/.052 = 25.8 19/.064 = 38.7 19/.083 = 64.5 37/.072 = 96.8 37/.083 = 129.0 37/.103 = 193.6
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