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Discuss Main switch and breaker arrangements which way..... in the Electrical Forum area at ElectriciansForums.net

Jimmy Boy

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Arms
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Do you prefer to do them I prefer Main on left breakers to the right 6A > Highest reason for asking ? I have seen a few pics on here of late with main on right.

ATB J
 
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Suppose it depends on the flavour of CU you use.

I always go high-low from MS/RCD though.
 

spark 68

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I usually reconfigure to suit the installation, and like Lenny said High to low (as this was the way I was taught) from the MS/RCD.
Sometimes on CU replacements this is not always easily possible, but I try to keep to this convention where possible, I suppose since almost all CU's nowadays have 100A busbars this is not as important as it once was.
 

Jimmy Boy

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Was there a logical reason for 'High to low' as opposed to 'Low to high' ?

ATB J
 

spark 68

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Was there a logical reason for 'High to low' as opposed to 'Low to high' ?

ATB J
Yes,

Heaviest current/load towards the main switch (incoming supply).
 
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