chevyx92
Senior Member
- Location
- VA BCH, VA
Will aluminum wire with deoxide on it suffice as a main bonding jumper?
250.28(a)
- Thread starter chevyx92
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walkerj
Senior Member
- Location
- Baton Rouge
I say there is no problem with the aluminum
Will the aluminum jumper "ensure electrical continuity and the capacity to conduct safely any fault current that is imposed on it"?
If so, then yes, in my opinion.
Proper sizing and the operating environment are also factors to consider.
What kind of equipment are you talking about?
Did the manufacturer not supply a jumper with the equipment?
steve
- Location
- Logan, Utah
That's not the whole story concerning 250.28(D).
If the largest un-grounded phase conductor is larger than 1100 KCM Cu (or 1750 KCM Al), you can't use the table.
Why? Simply because it doesn't go that high.
If larger than the numbers given, and the materials (metals) are the same type, you simply use a ratio of the largest un-grounded conductor....12 1/2% of the area..to size the bonding jumper
If the bonding conductor is of a different material than the un-grounded service conductors, you simply use the equivalent ampacity of the different material, and size the jumper according to that....12 1/2% of the ampacity of the largest un-grounded conductor.
So, a Aluminum bonding conductor will be larger than a Copper Bonding Jumper....
Why?....because it takes more aluminum to conduct the same amperage as copper.
My opinion
steve
chevyx92
Senior Member
- Location
- VA BCH, VA
Of course it will be sized properly, just wanted to make sure "aluminum" was allowed. I don't know why it specifically says "Copper" and then says or other corrosion-resistant material. Aluminum does corrode so I wasn't sure. It doesn't specifically say "Aluminum".
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