Aluminum Stranded Wire On QO Breaker? - Electrical - DIY Chatroom Home Improvement Forum

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Old 04-18-2012, 12:28 PM   #1
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Aluminum stranded wire on QO breaker?


I just purchased a new Leviton whole-house surge suppressor (model 51110-001):

It requires a 2-pole 20 amp breaker. I have a Square D 200 amp service panel (house is new -- about 3 years old) and I have installed a new QO 20 amp breaker (model QO220CP) to be dedicated to the surge suppressor connection:

However, I noticed the Leviton SPD has what appears to be stranded aluminum wires rather than copper which I thought was unusual. Is it acceptable to attach the stranded aluminum wires to the breaker even though the breaker has copper terminals? Do I need to use an anti-oxidant compound on the wires before connecting them to the breaker?



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Old 04-18-2012, 01:12 PM   #2
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I doubt that is AL.
More likely tined copper.
Nolox not required.


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Old 04-19-2012, 01:01 PM   #3
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QO breakers can use copper or aluminum conductors for one-wire applications. if using two-wire terminations (i.e. two conductors on the load terminal), then they must be copper. Stranded or solid doesn't matter.
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aluminum , breaker , copper , stranded , wire

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