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Application of BS7671 Table 54.7

McN41R 10 months ago

Can anyone offer experience on the application of Table 54.7 for Main Earth size on non PME supplies for supplies that have parallel incoming cables.

For example, 2 x 185mm2 PCV/SWA installed in separate ducts.

Thanks

Parents

0 McN41R 10 months ago
This question is with respect to understanding the application of:

Table 54.7

Parallel incoming cables.

Non PME supplies (so all supplies other than TN-C-S)

This question does is not with respect to:

Adiabatic equation

The most economical application

any specific size of cable

single cables
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0 McN41R 10 months ago
This question is with respect to understanding the application of:

Table 54.7

Parallel incoming cables.

Non PME supplies (so all supplies other than TN-C-S)

This question does is not with respect to:

Adiabatic equation

The most economical application

any specific size of cable

single cables
Cancel
Vote Up 0 Vote Down

Cancel

Children

0 Chris Pearson 10 months ago in reply to McN41R

If you can tell us clearly what you don't understand, there is a possibility of explaining it.
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0 McN41R 10 months ago in reply to Chris Pearson

I think I have provided a simple question that the IET finest should not have a problem with. I have nothing more to add.
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