Discuss Swa sheath size too small in the UK Electrical Forum area at ElectriciansForums.net

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an outbuilding is supplied by a 50mm twin SWA cable from a PME supply

The assessor has told me to convert to a TT as the steel csa is too small, is there a way I can prove that surely a 50mm twin swa sheath is suitable to be a 16mm earth?
 
an outbuilding is supplied by a 50mm twin SWA cable from a PME supply

The assessor has told me to convert to a TT as the steel csa is too small, is there a way I can prove that surely a 50mm twin swa sheath is suitable to be a 16mm earth?
yes look at this table
SWA
 
Sorry never copied, there is a table you can refer to unfortunately I can't copy it, try again
file:///C:/Users/Pete/Desktop/Resources/SWA%20CPC.pdf
No no
an outbuilding is supplied by a 50mm twin SWA cable from a PME supply

The assessor has told me to convert to a TT as the steel csa is too small, is there a way I can prove that surely a 50mm twin swa sheath is suitable to be a 16mm earth?
Has it worked this time
file:///C:/Users/Pete/Desktop/Resources/swa-as-the-cpc.html
 
Sorry never copied, there is a table you can refer to unfortunately I can't copy it, try again
file:///C:/Users/Pete/Desktop/Resources/SWA%20CPC.pdf

Try the 'Upload a File' option near 'Post Reply' button mate.. That might work
 
Try the 'Upload a File' option near 'Post Reply' button mate.. That might work
an outbuilding is supplied by a 50mm twin SWA cable from a PME supply

The assessor has told me to convert to a TT as the steel csa is too small, is there a way I can prove that surely a 50mm twin swa sheath is suitable to be a 16mm earth?
Chris sorry can't copy and paste my table try Google SWA as the cpc should come up with some thing.
 
Hi - looking in GN8 tables B 1, 2 or 3 it has 50mm swa with steel of 68 (2 core), 78 (3 core) or 90 (4 core). For bonding it's the ratio of resistivity which is about 8. This means the steel armour is worth about 8.5, 9.75 or 11.25 mm2 of copper. The incoming DNO neutral may be bigger than 50, but even 50 needs 16mm (Table 54.8).
 
Keeps me entertained every few weeks theres just like 3 posts from pete with links to a file on his desktop that nobody can obviously access then he eventually figures it out..... Then forgets for next time :D

Leave him alone...you may need to know how to replenish a Le Clanche Jar,one day,and he'll not help you...;)
 

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