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-   -   Aluminum stranded wire on QO breaker? (

swbrains 04-18-2012 01:28 PM

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?


jbfan 04-18-2012 02:12 PM

I doubt that is AL.
More likely tined copper.
Nolox not required.

itsnotrequired 04-19-2012 02:01 PM

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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