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4 wire main panel switched to sub panel


Jerry Lozier
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Remoldel on older home, switched previous main panel to sub panel off new main panel. Old 200 amp main (now just a disconnect) they ran #2 AL with a 70 amp breaker in new main panel.

QUESTION: any reason the old (now subpanel) should not have been rewired with neutrals floated as they are bonded like a main panel.

old panel

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tn_2011104185146_PA040096.jpg

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#2 AL from new panel

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tn_2011104185222_PA040099.jpg

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70 amp breaker in new panel to sub

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tn_2011104185244_PA040101.jpg

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Grounds and neutrals bonded

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tn_201110418538_PA040102.jpg

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thanks guys

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