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Fire Alarm Panel Electrical Isolation.

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Is single pole electrical isolation suggested here even if we are going to prod and poke about inside the fire alarm panel? And, what are the two fuses removed mentioned all about? Is the lecturer confused?


Please see 41.12 onwards.

https://www.bing.com/videos/search?q=youtube+bs+5839+part+1&&view=detail&mid=92E9069FDA874942E42A92E9069FDA874942E42A&rvsmid=7BBC139314220094A9417BBC139314220094A941&FORM=VDQVAP


Z.
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  • 0
    What is 537.2.6 all about then? 


    Switched fused connection units are double pole switched, as are 45 Amp cooker switches and shower switches, and consumer unit main switches, but extractor fan switches are triple pole. All used as isolators. I think that the presenter believes that neutrals are fused, that is why he is referring to two fuses being removed for fire alarm panel isolation, L & N. Still, hopefully the P.S.U. bits inside the panel are well insulated and the 24 Volts won't be too deadly.


    Z.
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  • 0
    What is 537.2.6 all about then? 


    Switched fused connection units are double pole switched, as are 45 Amp cooker switches and shower switches, and consumer unit main switches, but extractor fan switches are triple pole. All used as isolators. I think that the presenter believes that neutrals are fused, that is why he is referring to two fuses being removed for fire alarm panel isolation, L & N. Still, hopefully the P.S.U. bits inside the panel are well insulated and the 24 Volts won't be too deadly.


    Z.
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