Parent SKU : MCCUSTR3-3
SKU : MCCUSTR3-3-FT
3/3 Stranded Copper MC Feeder Cable W/ Ground is a heavy-duty 600V Metal-Clad (MC) building wire engineered for high-amperage 85A to 100A commercial feeder circuits, 120V/240V subpanel feeds, commercial HVAC equipment, and 3-phase power distribution.
Constructed with three flexible 3 AWG stranded bare copper conductors, an insulated 6 AWG green ground wire, THHN/THWN-2 insulation, protective binder tape, and an overall aluminum interlocked armor, this pre-armored MC feeder cable delivers maximum crush resistance while eliminating the high labor costs of pulling heavy conductors through rigid conduit.
Labor-Saving MC Feeder Design: Pre-armored assembly eliminates the labor-intensive process of pulling heavy gauge feeder conductors through conduit, significantly reducing jobsite installation time and labor costs.
Heavy Subpanel Feeder Capacity: Three 3 AWG copper conductors comfortably handle 85A to 100A 120V/240V split-phase distribution subpanels, 208V 3-phase 3-wire equipment, or commercial machinery.
High-Flex Stranded Copper: Built with Class B stranded bare copper conductors to provide superior flexibility, easier pulls, and clean terminations inside panel boards and disconnect switches.
Dual-Rated THHN/THWN-2 Insulation: High-dielectric PVC insulation with a clear nylon outer skin provides superior heat, flame, moisture, and gasoline/oil resistance rated for 90°C dry applications.
Lightweight Aluminum Interlocked Armor: Tough interlocked aluminum armor (AIA) shields internal conductors from physical damage, crushing, and abrasion while maintaining maximum bendability.
Integrated Green Ground Conductor: Includes a dedicated 6 AWG green THHN/THWN-2 insulated stranded copper ground conductor for complete system grounding and safety.
Engineering Overview
Application: Commercial and industrial feeder circuits, main subpanel power distribution, 3-phase machinery, and heavy equipment feeds.
Voltage Rating: 600 Volts.
Ampacity: 115 Amps @ 90°C (Based on 30°C ambient temperature per NEC Table 310.16; typically rated at 100A under standard 75°C terminal ratings per NEC Article 310).
Conductor Material: Class B stranded soft-drawn bare copper (3 conductors, 3 AWG).
Insulation: PVC (0.040" thickness) with clear Nylon jacket (0.006" thickness) (THHN/THWN-2).
Grounding Conductor: One 6 AWG green THHN/THWN-2 insulated stranded copper conductor.
Phase Identification: White, Black, Red phase conductors (120V/208V system color code).
Armor: Overall lightweight aluminum interlocked armor.
Diameter over Armor: 1.066 inches (27.076 mm).
Approximate Net Weight: 804 lbs / 1,000 ft.
Temperature Rating: -40°C to +90°C Dry.
Approvals & Compliance: UL Listed (UL 83, UL 1569, UL 1581), IEEE 1202 Vertical Tray Flame Test (70,000 BTU/hr), ASTM B3 & B8, Federal Spec A-A-59544, NEC Articles 230.43, 300.22, 330, 518.4, 520.5, 530, 545.4, 645. Hazardous Locations: Class I Div. 2, Class II Div. 2, Class III Div. 1 & 2.
**All values are nominal and subject to correction
| Wire Size (AWG/MCM) | 3 AWG |
| Conductor Material | Copper |
| Conductor Type | Stranded |
| Outer Diameter (OD) (in/mm) | 1.066 In. |
| Conductor Count | 3 |
| Shield | Unshielded |
| Insulation Type | PVC |
| UL Listing Numbers | UL 83, Ul 1569, UL 1581, UL 2556 |
| Voltage Rating | 600V |
| Submersible | No |
| Temperature Rating | 90ºC |
| Standards | UL Standards 83, 1569, 1581 & 2556 IEEE 1202 vertical tray flame test, 70, 000 BTU/hr ASTM B3, B258 NEC Articles 300.22, 330, 518.4, 520.5, 530, 545.4 & 645 Class I Div. 2, Class II Div. 2 and Class III Div. 1 Div. 2 for hazardous locations Federal Specification A-A59544 |
| Miscellaneous Information | All values are nominal and subject to correction. |
| RoHS Compliance | Yes |
| Primary Applications | Commercial Branch Circuits, Industrial Facilities, Lighting Systems, Residential Multi-Family Housing, Environmental Air Spaces, Exposed and Concealed Wiring |
| Common Uses |
|
| Weight per Foot | 0.804 lb |
Real-world application examples are provided for educational and general planning purposes only. Project requirements vary based on system design, environmental factors, and local codes. Buyers and specifiers are responsible for verifying that all materials meet exact job specifications and comply with NEC and local electrical regulations. Always consult with a licensed electrician prior to installation.
In-stock orders placed before 3pm EST typically ship within 1-2 business days. Our business days are Monday through Friday; we do not process orders on Saturday, Sunday, or major US Holidays.
You will receive an e-mail with a tracking number within 1-2 business days from the time its shipped. You will also be able to view your order status and tracking numbers in your account order history.
Expedited shipments are delivered Monday-Friday except on US Holidays. The order must be placed before 12pm CST to ship same day ( Mon-Fri Only).
You have 30 days from the day you receive the item to contact us for a return. Returns are subject to a 30% Restocking Fee.
Please contact us at help@wireamerica.com to request a return authorization. Have your order number or name the order was placed with ready and we will email you an RMA (return) number and instructions for return. Currently, we do not offer exchanges. A new order must be placed if you need a different item. If you provide the new order number at the time of your return request, the restocking fee may be lowered.
Orders on any items with a material value of $50 or less are non-returnable.
Parent SKU : MCCUSTR3-3
SKU : MCCUSTR3-3-FT
Parent SKU : MCCUSTR3-3
SKU : MCCUSTR3-3-FT
3/3 Stranded Copper MC Feeder Cable W/ Ground is a heavy-duty 600V Metal-Clad (MC) building wire engineered for high-amperage 85A to 100A commercial feeder circuits, 120V/240V subpanel feeds, commercial HVAC equipment, and 3-phase power distribution.
Constructed with three flexible 3 AWG stranded bare copper conductors, an insulated 6 AWG green ground wire, THHN/THWN-2 insulation, protective binder tape, and an overall aluminum interlocked armor, this pre-armored MC feeder cable delivers maximum crush resistance while eliminating the high labor costs of pulling heavy conductors through rigid conduit.
Labor-Saving MC Feeder Design: Pre-armored assembly eliminates the labor-intensive process of pulling heavy gauge feeder conductors through conduit, significantly reducing jobsite installation time and labor costs.
Heavy Subpanel Feeder Capacity: Three 3 AWG copper conductors comfortably handle 85A to 100A 120V/240V split-phase distribution subpanels, 208V 3-phase 3-wire equipment, or commercial machinery.
High-Flex Stranded Copper: Built with Class B stranded bare copper conductors to provide superior flexibility, easier pulls, and clean terminations inside panel boards and disconnect switches.
Dual-Rated THHN/THWN-2 Insulation: High-dielectric PVC insulation with a clear nylon outer skin provides superior heat, flame, moisture, and gasoline/oil resistance rated for 90°C dry applications.
Lightweight Aluminum Interlocked Armor: Tough interlocked aluminum armor (AIA) shields internal conductors from physical damage, crushing, and abrasion while maintaining maximum bendability.
Integrated Green Ground Conductor: Includes a dedicated 6 AWG green THHN/THWN-2 insulated stranded copper ground conductor for complete system grounding and safety.
Engineering Overview
Application: Commercial and industrial feeder circuits, main subpanel power distribution, 3-phase machinery, and heavy equipment feeds.
Voltage Rating: 600 Volts.
Ampacity: 115 Amps @ 90°C (Based on 30°C ambient temperature per NEC Table 310.16; typically rated at 100A under standard 75°C terminal ratings per NEC Article 310).
Conductor Material: Class B stranded soft-drawn bare copper (3 conductors, 3 AWG).
Insulation: PVC (0.040" thickness) with clear Nylon jacket (0.006" thickness) (THHN/THWN-2).
Grounding Conductor: One 6 AWG green THHN/THWN-2 insulated stranded copper conductor.
Phase Identification: White, Black, Red phase conductors (120V/208V system color code).
Armor: Overall lightweight aluminum interlocked armor.
Diameter over Armor: 1.066 inches (27.076 mm).
Approximate Net Weight: 804 lbs / 1,000 ft.
Temperature Rating: -40°C to +90°C Dry.
Approvals & Compliance: UL Listed (UL 83, UL 1569, UL 1581), IEEE 1202 Vertical Tray Flame Test (70,000 BTU/hr), ASTM B3 & B8, Federal Spec A-A-59544, NEC Articles 230.43, 300.22, 330, 518.4, 520.5, 530, 545.4, 645. Hazardous Locations: Class I Div. 2, Class II Div. 2, Class III Div. 1 & 2.
**All values are nominal and subject to correction
| Wire Size (AWG/MCM) | 3 AWG |
| Conductor Material | Copper |
| Conductor Type | Stranded |
| Outer Diameter (OD) (in/mm) | 1.066 In. |
| Conductor Count | 3 |
| Shield | Unshielded |
| Insulation Type | PVC |
| UL Listing Numbers | UL 83, Ul 1569, UL 1581, UL 2556 |
| Voltage Rating | 600V |
| Submersible | No |
| Temperature Rating | 90ºC |
| Standards | UL Standards 83, 1569, 1581 & 2556 IEEE 1202 vertical tray flame test, 70, 000 BTU/hr ASTM B3, B258 NEC Articles 300.22, 330, 518.4, 520.5, 530, 545.4 & 645 Class I Div. 2, Class II Div. 2 and Class III Div. 1 Div. 2 for hazardous locations Federal Specification A-A59544 |
| Miscellaneous Information | All values are nominal and subject to correction. |
| RoHS Compliance | Yes |
| Primary Applications | Commercial Branch Circuits, Industrial Facilities, Lighting Systems, Residential Multi-Family Housing, Environmental Air Spaces, Exposed and Concealed Wiring |
| Common Uses |
|
| Weight per Foot | 0.804 lb |
Real-world application examples are provided for educational and general planning purposes only. Project requirements vary based on system design, environmental factors, and local codes. Buyers and specifiers are responsible for verifying that all materials meet exact job specifications and comply with NEC and local electrical regulations. Always consult with a licensed electrician prior to installation.
In-stock orders placed before 3pm EST typically ship within 1-2 business days. Our business days are Monday through Friday; we do not process orders on Saturday, Sunday, or major US Holidays.
You will receive an e-mail with a tracking number within 1-2 business days from the time its shipped. You will also be able to view your order status and tracking numbers in your account order history.
Expedited shipments are delivered Monday-Friday except on US Holidays. The order must be placed before 12pm CST to ship same day ( Mon-Fri Only).
You have 30 days from the day you receive the item to contact us for a return. Returns are subject to a 30% Restocking Fee.
Please contact us at help@wireamerica.com to request a return authorization. Have your order number or name the order was placed with ready and we will email you an RMA (return) number and instructions for return. Currently, we do not offer exchanges. A new order must be placed if you need a different item. If you provide the new order number at the time of your return request, the restocking fee may be lowered.
Orders on any items with a material value of $50 or less are non-returnable.
Get notified when this product is back in stock
Physical Specifications
Technical Specifications
Usage & Installation:
Packaging & Dimensions:
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3/3 Stranded Copper MC Feeder Cable is a 600V metal-clad feeder cable used for 85A, 90A, and 100A subpanel feeds, commercial HVAC equipment, industrial machinery, and 120V/240V distribution. It features three 3 AWG stranded copper circuit conductors (Black/Red/White) and one 6 AWG green insulated ground enclosed in an aluminum interlocked armor.
3/3 MC Cable contains three current-carrying conductors (Black/Red/White) plus ground for single-phase 120V/240V split-phase systems, subpanels, or 3-phase 3-wire equipment. 3/4 MC Cable adds a fourth conductor (Blue), enabling full 3-phase 4-wire wye distribution (Black/Red/Blue/White) or running dual branch circuits with dedicated neutrals in a single armor sheath.
Yes. Under NEC Article 330, 3/3 MC Cable is fully approved as a subpanel feeder cable in commercial, industrial, and multi-residential structures. Its continuous interlocked metal armor provides full mechanical protection without requiring pipe or conduit.
Per NEC Table 310.16, 3 AWG copper carries a maximum thermal rating of 115 Amps at 90°C. However, because standard breaker lugs and equipment terminals are rated for 75°C terminations, 3 AWG copper is sized at 100 Amps. Depending on continuous load calculations and next-standard-fuse rules (NEC 240.4(B)), it is most commonly paired with an 80A, 90A, or 100A circuit breaker.
In accordance with UL 1569 manufacturing standards for feeder-size MC cable, 3/3 MC Cable includes a 6 AWG green THHN/THWN-2 insulated stranded copper grounding conductor.
Yes. Because the aluminum interlocked armor provides continuous mechanical protection, MC feeder cable is approved under NEC Article 330 to be installed directly inside walls, exposed across ceilings, or laid in cable trays without pulling through pipe or conduit.
Standard 3/3 MC cable with aluminum interlocked armor is designed for dry indoor applications (rated 90°C Dry). For direct burial or wet outdoor environments, a PVC-jacketed MC cable (PVC over armor) or liquid-tight raceway system is required.
Yes. We stock a full selection of lightweight, cost-effective Aluminum MC Cable for commercial and industrial feeder applications. While stranded copper offers higher ampacity per conductor size and smaller overall cable diameters, aluminum MC cable provides significant cost savings and reduced overall weight on long feeder pulls. Note that aluminum conductors typically require upsizing by one or two wire sizes (e.g., 1 AWG aluminum to match 3 AWG copper ampacity) and require dual-rated AL7CU/AL9CU terminations.
Yes! Wire America supplies and custom-cuts 3/3 Stranded Copper MC Feeder Cable by the foot with zero cut fees, allowing you to buy the exact length your project requires and eliminate jobsite scrap. We also supply full master coils and reels for major commercial contractors. Order online or call our sales desk directly at (833) 268-8644 for cut lengths, submittal sheets, or bulk project pricing.
(833) 268-8644
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