cable selection
- Thread starter pino
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stew
Senior Member
- Location
- federal way,washington
Re: cable selection
What is the voltage and what will the load current be on the panel or do you want to size for 40 amps?
What is the voltage and what will the load current be on the panel or do you want to size for 40 amps?
bphgravity
Senior Member
- Location
- Florida
Re: cable selection
Is there such thing as a 40A panel? Asumming a few things due, I am supposing since this is a feeder it will either be 240V or 480V. I am also assuming 5% voltage drop and a K value of 12.9 for copper conductors.
At 240V, #3 AWG will be sufficent for a 40A load
At 480V, #6 AWG will be sufficent for a 40A load
Is there such thing as a 40A panel? Asumming a few things due, I am supposing since this is a feeder it will either be 240V or 480V. I am also assuming 5% voltage drop and a K value of 12.9 for copper conductors.
At 240V, #3 AWG will be sufficent for a 40A load
At 480V, #6 AWG will be sufficent for a 40A load
charlie
Senior Member
- Location
- Indianapolis
Re: cable selection
Is this homework or an actual situation? What answers did you come up with, show us your calcs.
Is this homework or an actual situation? What answers did you come up with, show us your calcs.
- Location
- Bremerton, Washington
Re: cable selection
While it may be a 40 amp panel, it may not be a 40 amp load, it could be only 2500 VA or less. The panel size doesn't dictate the load.
While it may be a 40 amp panel, it may not be a 40 amp load, it could be only 2500 VA or less. The panel size doesn't dictate the load.
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