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That would need a busbar, an aluminium one with a cross section of 1 cm by 9 cm (or larger).

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A 600 MCM copper conductor with an insulation factor of 90 degrees C is rated at 475 amps.

A 300 MCM copper conductor with an insulation factor of 90 degrees C is rated at 320 amps.

A 3/0 copper conductor with an insulation factor of 90 degrees C is rated at 225 amps.

These size wires can be installed in parallel 600 MCM, tripled for 300 MCM or grouped in four 3/0 wires groups to achieve the amperage required.

Special parallel, three barrel and four barrel lugs have to be used to make the connection to the required load.

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10y ago
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6mo ago

For a 900 amp load, you would typically need very heavy-duty wire such as 600 MCM (thousand circular mils) or larger. The exact size will depend on the specific application, distance, and voltage drop considerations. It is recommended to consult with a professional electrician or engineer for a precise calculation.

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Q: What size wire do you need for 900 amp?
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