keniff
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i went to look at a job today, the fuseboard was fed by 16mm t+e, from a 60amp switchfuse. im guessing its been moved at somepoint, do you take a ze reading from the switchfuse or from the board its feeding? iv never come across this, normally if its a submain from another board i would treat as db-zs but this is straight from the meter to the switchfuse that in turn feeds the fuseboard. any opinions welcome 
