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Name the breaker. (Dorman Smith BS3871 Type D).

Sparkingchip

I an trying to determine the maximum Zs for the spare 16 amp MCB with a 5 second disconnect time. 

The maximum Zs of the SWA distribution circuit will be less than 1.4 ohms using a third core as the CPC not including the armour, so it will be lower.

Edit- taking Ze as 0.8 ohms TNS.

professional-electrician.com/.../

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    it will be a type 1 or 2 in domestic

    Probably should be type 1 or 2, but you do occasionally come across odd things, like type 4s.

      - Andy.

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  • 0

    it will be a type 1 or 2 in domestic

    Probably should be type 1 or 2, but you do occasionally come across odd things, like type 4s.

      - Andy.

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