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Best practices

Hi all can someone please give me some advice on the following? 

 

  1. say you’re maintaining a circuit and you realise parts of the circuits do not comply to the regulations what is the standard procedure for example ZS values that do not comply or IR that’s too low. I know in the industrial setting we are pressured to keep things going (critical kit) but say even if we’ve got it in writing we’ve said it’s potentially dangerous and we’ve been told in writing to switch it back on who is then at fault?

 

  1. say the circuit is an old installation and complied at the time of installation if we were then doing work on that circuit say for instance changing adding a spur to sockets that aren’t RCD protected what is the protocol with regards to bringing it up to current standard? 

 

Parents
  • That R1+R2 seems a little high unless it is a very long circuit. Table 41.4 gives 0.42 s for a 100 A BS 88-2 fuse at 5 s disconnection time. Table 41.2 does not go to 100 A. Not a country mile out and I think advise rather than refuse to re-energise. Perhaps a supplementary CPC is required?

Reply
  • That R1+R2 seems a little high unless it is a very long circuit. Table 41.4 gives 0.42 s for a 100 A BS 88-2 fuse at 5 s disconnection time. Table 41.2 does not go to 100 A. Not a country mile out and I think advise rather than refuse to re-energise. Perhaps a supplementary CPC is required?

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