24Hour:
lack of surge is a note for me , unless other circumstances.
obvious c3 for me re the plastic fusebord , but and i say but with tongue in cheek !, the napit code breaker book states a c2 for a plastic db with no thermal or other damage if it’s mounted under the stairs , my opinion is it’s still a c3 if in good order , and that’s the nub bright there , it’s engineering judgement by an inspector who should have the necessary experience and expertise, and in the current market those 2 attributes are in short supply .
The lack of S.P.Ds is a contentious issue. Most customers do not understand them, they just think that we want to profit from their installation. They are expensive and a pain to install in some cases. Also, do they really work for sustained long fault overvoltages?
I have seen many local cases of damage due to long sustained overvoltages when an S.P.D. probably would not have helped. Perhaps they are good for short transient overvoltages but for a long term fault I do not think so.
Z.
24Hour:
lack of surge is a note for me , unless other circumstances.
obvious c3 for me re the plastic fusebord , but and i say but with tongue in cheek !, the napit code breaker book states a c2 for a plastic db with no thermal or other damage if it’s mounted under the stairs , my opinion is it’s still a c3 if in good order , and that’s the nub bright there , it’s engineering judgement by an inspector who should have the necessary experience and expertise, and in the current market those 2 attributes are in short supply .
The lack of S.P.Ds is a contentious issue. Most customers do not understand them, they just think that we want to profit from their installation. They are expensive and a pain to install in some cases. Also, do they really work for sustained long fault overvoltages?
I have seen many local cases of damage due to long sustained overvoltages when an S.P.D. probably would not have helped. Perhaps they are good for short transient overvoltages but for a long term fault I do not think so.
Z.
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