sub DB supplies

[bobby101]

hi all just a quick question when on a site i came acreoss a sub db (single phse 4 way)(30 mts from main db) being fed via a 10mm t&e i was unsure whether or not to report it to the client as unsuitable cable size and advise to upgrade, the sub db had 4x 30 amp supplies please advise

 

[bigspark17]

need more info..what circuit breaker is protecting the sub.? what is the surrounding enviroment.? what are the 30A supplies on the sub board.?

 

[bobby101]

It was a 60or 80amp switch fuse isolator looped from the incoming

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It was a 60or 80amp switch fuse isolator looped from the incoming

 

[nicsin02]

Are u saying it has been dipped into the 80a mainswitch meaning the 10mm cable is probably protected by 100a cut-off fuse ?