ses
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- Joined
- Oct 15, 2009
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I have recently been on two jobs in factories where they have two incoming supplies.
1 3 phase supply for main factory and 1 single phase supply for offices.
The gas bonding on the one job was 50mm fed from the main 3 phase met and the water bonding was 10mm fed from the single phase supply.
The gas and water supplies are shared throughout the building.
Water incoming in offices and gas in main factory area.
however electric circuit from 3 phase are run into some of office areas.
My question is thus:
What size is the bonding supposed to be in this case?
do you go off the incoming 3 phase supply size or the single phase?
1 3 phase supply for main factory and 1 single phase supply for offices.
The gas bonding on the one job was 50mm fed from the main 3 phase met and the water bonding was 10mm fed from the single phase supply.
The gas and water supplies are shared throughout the building.
Water incoming in offices and gas in main factory area.
however electric circuit from 3 phase are run into some of office areas.
My question is thus:
What size is the bonding supposed to be in this case?
do you go off the incoming 3 phase supply size or the single phase?
