Great freebies of our time

[matty]

I have just received in the post a pocket guide (#18, no less) to 'maximum measured values of earth fault loop impedance (Zs)'.

 

Interesting, it states "the values of maximum earth fault loop impedance (Zs) given in tables 41.2, 41.3 and 41.4 in Chapter 41 of BS 7671:2008, for commonly-used overcurrent protective devices, should not be exceeded when the conductors are at their normal operating temperature (such as up to 70 degrees C for thermoplastic insulated conductors).

 

How I've survived this long without it, I will never know.

[charlie clown]

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[ManxRed]

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[matty]

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[Sir Tokyo Sexwale]

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[Falconhoof]

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