Old cable Size help please.

[EdwardCurrent]

Hello All.

Could somebody please help me convert some old T&E sizes please ?
They are on a PIR schedule issued @2001. I only have the certs and have not seen the installation.

7/.044 3/.029
7/.029 3/.029
1/044 1/044

Many thanks for any help.
Regards

Ed

 

[Johnmelad502]

1/.044 = 1.0mm.
3/.026 = 1.5mm;
7./026 = 2.5mm;
7/.036 = 4.0mm;
7/.044 = 6.0mm;
7/.053 = 10mm;
7/.064 = 16mm;
19/.064 = 25mm.

Could only find the above on a quick search...

 

[GaryMo]

Try this pdf

 

[Johnmelad502]

Try this pdf

Nice one...

 

[ericmark]

7 = number of strands and 0.029 is thickness in inches so using pi*r squared in excel I get.
7/0.044= 6.866899757 mm sq
3/0.029= 1.27842297 mm sq
7/0.029= 2.982986929 mm sq
3/0.029= 1.27842297 mm sq
1/0.044= 0.98098568 mm sq
Where A1 = number if strands and C1 thickness then
=POWER(((C1*25.4)/2),2)*PI()*A1
Works it out in excel

 

[GaryMo]

An example of how to work it out yourself:

7/.044

7 strands of 0.044" diameter

Convert 0.044" to mm

0.044 x 25.4 = 1.12mm

CSA = (π x d²)/4

CSA = (3.142 x (1.12 x 1.12)) / 4

CSA = 0.99mm

That's just one strand so multiply by 7 to get total CSA

0.99 x 7 = 6.93mm

 

[securespark]

According to Gary's formula, the following are computed:

1/.044 = 0.98mm² = 13A

3/.029 = 1.28mm² = 16A

3/.036 = 1.97mm² = 20A

7/.029 = 2.98mm² = 25A

7/.036 = 4.6mm² = 33A

7/.044 = 6.87mm² = 41A

7/.052 = 9.59mm² = 52A

7/.064 = 14.53mm² = 67A

19/.044 = 18.64mm² = 79A

19/.052 = 26.03mm² = 94A

19/.064 = 39.43mm² = 125A

All current carrying capacities are taken from the 14th Edition, clipped direct.

 

[ban-all-sheds]

'tis in the Wiki now...