Copper-Clad Aluminum NM-B: Relax. This isn't that aluminum

If you heard "aluminum wire" and felt a little sweat on the back of your neck — we get it.

The 1970s aluminum branch wiring earned its reputation. Soft conductors. Oxidation. Loose connections. Fires. Every old-timer has a story. Most of them are true.

But this isn't that aluminum.

So what is it?

Copperweld Copper-Clad Aluminum (CCA) NM-B is a modern bi-metal conductor. Solid AA-8000 series aluminum core. Permanently bonded to an outer layer of copper.

That means you get the termination compatibility of copper with the weight and cost advantages of aluminum. Completely different engineering. Same installation habits. No new tools. No new tricks.

Why are builders and contractors taking a look?

Because the appeal isn't theoretical. It shows up on bids. And on the job site.

First, pricing stability. CCA uses significantly less copper, which helps soften the hit when copper prices go crazy.

Second, it's lightweight. Aluminum is dramatically lighter than copper. Easier pulls. Less fatigue by 4pm. Your shoulders will thank you.

Third — and this one's real — lower theft risk. Copper-clad conductors have far less scrap value than solid copper. True story: an Atlanta contractor had a container emptied by thieves. They left the CCA. Didn't even touch it.

What we have in stock right now

At all CPESI locations in Denver:

12/2 and 12/3 NM-B in 250' coils
10/2 and 10/3 NM-B in 250' coils
6/3 and 4/3 NM-B cut-to-length by the foot

The sizing map — read this twice

If you're used to copper, here's the substitution:

15A / 14 AWG copper → 12 AWG CCA
20A / 12 AWG copper → 10 AWG CCA
30A / 10 AWG copper → 8 AWG CCA

Size up. Still lighter on the pull.

Yes, it's UL listed. Yes, it's code compliant.

Copperweld CCA NM-B is UL listed (E538020, E510284, E492024) and identified for use with standard wiring devices and connectors rated for CC, Cu, Cu/Al, and CO/ALR.

If you're splicing with twist-on connectors, pre-twisting is not required. Just install it like you always have.

Bottom line

Large residential builders are taking a closer look as material economics keep changing. EV chargers. Heat pumps. Solar. Higher circuit counts. This is built for the way homes are being wired today.

Stop by any CPESI location. Or call. A human picks up.