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Harry The Hole
Im carrying out a Minor Works Cert on a Hager dist board. The switch disconnector is a 3p 100A MCB to BS5419. Can anyone please tell me what the maximum Zs permitted by BS7671 would be.
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Harry The Hole
Spark123 said:
Basically the original switch disconnector in the off position would not disconnect the BLACK (YELLOW) phase to the dist board
Spark123 said:
Just to expand a little for the OP
A BS5419 device is a switch disconnector. It is not an MCB, therefore it does not have a max permitted Zs, as regardless of how large or small a fault were to occur the BS5419 device will not trip (because they are just a switch).
On the MEW cert. you need to put the characteristics of the OCPD which feeds the switch disconnector you have replaced.
As a side note, I thought BS5419 had been superseded by BSEN60947-3
Does anyone know if they still make BS5419 isolators?
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Harry The Hole
RF Lighting said:
Many thanks for your help.
I agree BS5419 has now been superseded, but when I received the replacement disconnector, the new one had BS5419 stamped on it. By the way it is Hager. Obviously old stock
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