Type NM-B
CCA Building Wire

600V | Premium Building Wire

The Copperweld NM-B Advantage

Copperweld NM-B Building Wire is a welcome value to every stakeholder in the residential space.

Installed to NEC requirements, Copperweld NM-B Building Wire offers more electrical efficiency than its alternatives, pointing to lower monthly utility costs and smoother running equipment.  Its light weight and flexibility create opportunities for labor savings.  Disincentivizing pilferage and theft, it offers thieves only a small fraction of the scrap value of single-metal copper scrap.

Product overview

Cu-Clad Aluminum (CCA) Conductor — Drawn from a copper-clad aluminum rod, with the copper metallurgically bonded to an AA 8000 series aluminum core, where oxygen-free copper forms a minimum of 10 percent of the cross-sectional area of a solid conductor or each strand of a stranded conductor.

Application Standards — UL (UL-83, UL-719, UL-1581, UL-2556); NFPA 70 (NEC®) Article 334; ASTM-B-566; NEMA RV 2-2011

Conductors — For wire sizes 12-10, solid annealed THHN Copper-Clad Aluminum with solid Copper Clad Aluminum ground.  For 8 AWG sizes and larger, stranded annealed THHN Copper-Clad Aluminum with solid Copper-Clad Aluminum ground.

Conductor Insulation — Color-coded Polyvinyl Chloride (PVC) compound meeting the required thickness of Type THHN with a heat-stabilized Nylon jacket rated for 90°C in dry locations.

Grounding Conductor — For NM-B 12-10 AWG sizes: ground will be 12-10 AWG, solid, annealed conductor. For NM-B 8 AWG sizes and larger: ground will be 8 AWG, solid, annealed.

NM-B Jacket — Made with 30-mil flame retardant and moisture resistant PVC to safety listing standards. Colors according to industry norms and specific application.

Identification, applications and usage

Copperweld® Copper-Clad Aluminum Type NM-B (non-metallic sheathed cable) is referenced by Article 334 of the National Electrical Code. OSHA safety listed: UL E492024. ETL listing: 5021266.

Wiring Methods: Per Article 334 of the NEC, Copperweld® Type NM-B shall not be used in wet or damp locations where an electrolyte might be present. It may only be used in dry locations for indoor wiring. Copperweld® NM-B cable should be sized per NEC ampacity table 310.16 using the 60°C column. It may be used as the primary electrical conductor for the residential branch circuit system, providing service for outlets, switches and 240 Volt appliance loads. It cannot be used as a service entry cable, nor can it be buried.  Copperweld NM-B must be protected from physical damage per Article 300.4 of the NEC.  It must not be installed in locations exposed to corrosive fumes or vapors. Per Article 590, Copperweld® NM-B can be used in temporary installations as feeders and branch circuits for power and lighting. Type NM-B is rated 600-volt for both exposed and concealed work in dry locations, as defined by the National Electrical Code.

Identified for use with wiring devices, splice connectors and equipment terminals rated for CC, Cu, Cu/Al and CO/ALR. When terminating with twist-on splice connectors, pre-twisting is not recommended. Torque until the wires are tight under the cap and visibly twisted together two times outside of the cap to ensure electrical contact. Do not over-torque or under-torque. Ensure secure connection limiting wire deformation. Copperweld® NM-B is made with ASTM B-566 Copper-Clad Aluminum bare wire, which carries its own component listing, RU DVVU2 and DVVV2. Copperweld NM-B conductors are suitable to terminate on 15 and 20 ampere rated wiring devices (receptacles and snap switches) marked "copper only" or "CO/ALR."  For termination on devices rated 30 amperes or greater, the termination must be marked "CU/AL" or equivalent.  Please consult UL Product IQ guide information RTRT and WJQR if further confirmation is required. Copperweld® NM-B may be pigtailed to single-metal copper wire in dry locations. Copperweld® NM-B cable should not be terminated with single-metal aluminum wire without the application of an oxide inhibitor or a terminal or connector specifically listed for the intermixing of dissimilar conductor metals. Copperweld® ASTM B-566 Copper-Clad Aluminum wire is not dissimilar to copper, brass or zinc-plated steel.

Copperweld NM-B Product Offering

12 AWG

Replaces: 14 AWG Solid Copper

12/2-G

12/3-G

Strands:

1

1

Jacket Color:

White

White

Ground Wire Size:

12 AWG

12 AWG

THHN Insulation Thickness (PVC):**

0.015

0.015

THHN Jacket Thickness (Nylon):

0.004

0.004

Allowable Ampacity @ 60° C*

15

15

Outside Diameter (in)

0.191 x 0.403

0.191 x 0.522

Approx. Weight (lb/1000 ft)

45.51

61.25

Standard Packaging

250' Coil, 1000' Wood Reel

250' Coil, 1000' Wood Reel

Standard 48x48 Pallet Qty.

108/12

81/12

*
Ampacity of NM-B conductors are based on NFPA 70 (NEC) Table 310.16 for a temperature rating of the conductors of 60°C according to article 334.80 (Ampacity for NM Cable).See 110.14 (C), 240.4(D), 310.15(B) and 334.80 for other limitations where applicable. Note: Additional ampacity limitations, adjustments or corrections may apply per 310.16, 334.80 and 240.4 of the NEC
**
Jacket thickness for NM-B cable is 30 mils

10 AWG

Replaces: 12 AWG Solid Copper

10/2-G

10/3-G

Strands:

1

1

Jacket Color:

Yellow

Yellow

Ground Wire Size:

10 AWG

10 AWG

THHN Insulation Thickness (PVC):**

0.020

0.020

THHN Jacket Thickness (Nylon):

0.004

0.004

Allowable Ampacity @ 60° C*

25

25

Outside Diameter (in)

0.222 x 0.487

0.222 x 0.637

Approx. Weight (lb/1000 ft)

67.21

89.84

Standard Packaging

250' Coil, 1000' Wood Reel

250' Coil, 1000' Wood Reel

Standard 48x48 Pallet Qty.

81/12

54/12

*
Ampacity of NM-B conductors are based on NFPA 70 (NEC) Table 310.16 for a temperature rating of the conductors of 60°C according to article 334.80 (Ampacity for NM Cable).See 110.14 (C), 240.4(D), 310.15(B) and 334.80 for other limitations where applicable. Note: Additional ampacity limitations, adjustments or corrections may apply per 310.16, 334.80 and 240.4 of the NEC
**
Jacket thickness for NM-B cable is 30 mils

8 AWG

Replaces: 10 AWG Solid Copper

8/2-G

8/3-G

Strands:

7

7

Jacket Color:

Orange

Orange

Ground Wire Size:

8 AWG

8 AWG

THHN Insulation Thickness (PVC):**

0.030

0.030

THHN Jacket Thickness (Nylon):

0.005

0.005

Allowable Ampacity @ 60° C*

35

35

Outside Diameter (in)

0.277 x 0.693

0.582

Approx. Weight (lb/1000 ft)

123.64

155.65

Standard Packaging

1000' Wood Reel

1000' Wood Reel

Standard 48x48 Pallet Qty.

10

10

*
Ampacity of NM-B conductors are based on NFPA 70 (NEC) Table 310.16 for a temperature rating of the conductors of 60°C according to article 334.80 (Ampacity for NM Cable).See 110.14 (C), 240.4(D), 310.15(B) and 334.80 for other limitations where applicable. Note: Additional ampacity limitations, adjustments or corrections may apply per 310.16, 334.80 and 240.4 of the NEC
**
Jacket thickness for NM-B cable is 30 mils

6 AWG

Replaces: 8 AWG Solid Copper

6/2-G

6/3-G

Strands:

7

7

Jacket Color:

Black

Black

Ground Wire Size:

8 AWG

8 AWG

THHN Insulation Thickness (PVC):**

0.030

0.030

THHN Jacket Thickness (Nylon):

0.005

0.005

Allowable Ampacity @ 60° C*

40

40

Outside Diameter (in)

0.314 x 0.769

0.674

Approx. Weight (lb/1000 ft)

155.65

213.06

Standard Packaging

1000' Wood Reel

1000' Wood Reel

Standard 48x48 Pallet Qty.

10

10

*
Ampacity of NM-B conductors are based on NFPA 70 (NEC) Table 310.16 for a temperature rating of the conductors of 60°C according to article 334.80 (Ampacity for NM Cable).See 110.14 (C), 240.4(D), 310.15(B) and 334.80 for other limitations where applicable. Note: Additional ampacity limitations, adjustments or corrections may apply per 310.16, 334.80 and 240.4 of the NEC
**
Jacket thickness for NM-B cable is 30 mils

4 AWG

Replaces: 6 AWG Solid Copper

4/2-G

4/3-G

Strands:

7

7

Jacket Color:

Black

Black

Ground Wire Size:

8 AWG

8 AWG

THHN Insulation Thickness (PVC):**

0.040

0.040

THHN Jacket Thickness (Nylon):

0.006

0.006

Allowable Ampacity @ 60° C*

55

55

Outside Diameter (in)

0.385 x 0.909

0.843

Approx. Weight (lb/1000 ft)

225.49

315.91

Standard Packaging

1000' Wood Reel

1000' Wood Reel

Standard 48x48 Pallet Qty.

8

4

*
Ampacity of NM-B conductors are based on NFPA 70 (NEC) Table 310.16 for a temperature rating of the conductors of 60°C according to article 334.80 (Ampacity for NM Cable).See 110.14 (C), 240.4(D), 310.15(B) and 334.80 for other limitations where applicable. Note: Additional ampacity limitations, adjustments or corrections may apply per 310.16, 334.80 and 240.4 of the NEC
**
Jacket thickness for NM-B cable is 30 mils

Allowable Ampacities

Jacket
Color

Copperweld Cu-Clad

Copper
AWG

Standard Copper

(in)

Types: TW, UF

Types: TW, UF

Types: RHW, THHW, THW, THWN, XHHW, USE

60°C
(140°F)

75°C
(167°F)

90°C
(194°F)

Cu-Clad AWG

Copper
AWG X-ref

60°C
(140°F)

75°C
(167°F)

90°C
(194°F)

Types: TBS, SA, SIS, THHN, THWN, THW-2, THWN-2, RHH, RHW-2, USE-2, XHH, XHHW, XHHW-2, ZW-2

White

12**

Types: RHW, THHW, THW, THWN, XHHW, USE

Replaces

Types: TBS, SA, SIS, THHN, THWN, THW-2, THWN-2, RHH, RHW-2, USE-2, XHH, XHHW, XHHW-2, ZW-2

15

20

25

14**

15

20

25

Yellow

10**

Exceeds by 5 Amps

25

30

35

12**

20

25

30

Orange

8*

Exceeds by 5 Amps

35

40

45

10**

30

35

40

Black/
Other

6

Replaces

40

50

55

8

40

50

55

Black/
Other

4

Replaces

55

65

75

6

55

65

75

*
Refer to 310.15(B)(2) for the ampacity correction factors where the ambient temperature is other than 30°C (86°F).
**
Refer to 240.4(D) for conductor overcurrent protection limitations.

Copperweld Building Wire Benefits

Reduces Theft Incentive

CCA offers a fraction of the scrap value of copper building wire.

Energy Efficient

When sized per Code, CCA delivers improved energy efficiency over alternatives.

Easy to Install

CCA is lightweight, flexible, and terminates to standard torquing values.

Code Compliant

NEC compliant for 600 Volt residential branch circuit conductors since 1971.

Safety Tested

Listed for safety for use in general electrical wiring and branch circuits.

Proven Performance

CCA has 50 years of safe performance history in standard circuits.