Parent SKU : MCCUSTR8-4
SKU : MCCUSTR8-4-500
8/4 Stranded Copper MC Cable W/ Ground is a heavy-duty 600V Metal-Clad (MC) building wire engineered for 3-phase 4-wire power distribution, 40A/50A commercial equipment feeders, 120V/208V commercial lighting distribution, and dual-circuit subpanel runs.
Constructed with four flexible 8 AWG Class B stranded bare copper conductors, an insulated 10 AWG green ground wire, THHN/THWN-2 insulation, protective binder tape, and an overall aluminum interlocked armor, it delivers exceptional crush resistance while eliminating the high labor costs of pulling heavy gauge conductors through conduit.
Labor-Saving Metal-Clad Design: Pre-armored assembly eliminates the time-consuming process of pulling heavy gauge conductors through conduit, lowering jobsite labor costs and accelerating project timelines.
3-Phase 4-Wire Power Distribution: Four 8 AWG circuit conductors support 120V/208V 3-phase wye power runs, or dual 40A/50A 120V branch circuits with separate neutrals.
High-Flex Stranded Copper: Built with Class B stranded bare copper conductors to provide superior flexibility, easier pulls, and smooth 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 10 AWG green THHN/THWN-2 insulated stranded copper ground conductor for complete circuit safety.
Engineering Overview
Application: 3-phase branch, feeder, and distribution circuits in commercial, industrial, institutional, and multi-residential power, lighting, control, and signal systems.
Voltage Rating: 600 Volts.
Ampacity: 55 Amps @ 90°C (Based on 30°C ambient temperature per NEC Table 310.16; refer to equipment termination temperature ratings, typically 75°C / 50A, per NEC Article 310; apply derating factors per NEC 310.15(C)(1) when more than three conductors carry current).
Conductor Material: Class B stranded soft-drawn bare copper (4 conductors, 8 AWG).
Insulation: PVC (0.030" thickness) with clear Nylon jacket (0.004" thickness) (THHN/THWN-2).
Grounding Conductor: One 10 AWG green THHN/THWN-2 insulated stranded copper conductor.
Phase Identification: White, Black, Red, Blue phase conductors (120V/208V system color code).
Armor: Overall lightweight aluminum interlocked armor.
Diameter over Armor: 0.819 inches (20.802 mm).
Approximate Net Weight: 412 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) | 8 AWG |
| Conductor Material | Copper |
| Conductor Type | Stranded |
| Outer Diameter (OD) (in/mm) | 0.819 In. |
| Conductor Count | 4 |
| Shield | Unshielded |
| Insulation Type | PVC |
| UL Listing Numbers | UL 83, Ul 1569, UL 1581, UL 2556 |
| Voltage Rating | 600V |
| Ampacity Rating | 55 |
| 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 | 0.412 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 : MCCUSTR8-4
SKU : MCCUSTR8-4-500
Parent SKU : MCCUSTR8-4
SKU : MCCUSTR8-4-500
8/4 Stranded Copper MC Cable W/ Ground is a heavy-duty 600V Metal-Clad (MC) building wire engineered for 3-phase 4-wire power distribution, 40A/50A commercial equipment feeders, 120V/208V commercial lighting distribution, and dual-circuit subpanel runs.
Constructed with four flexible 8 AWG Class B stranded bare copper conductors, an insulated 10 AWG green ground wire, THHN/THWN-2 insulation, protective binder tape, and an overall aluminum interlocked armor, it delivers exceptional crush resistance while eliminating the high labor costs of pulling heavy gauge conductors through conduit.
Labor-Saving Metal-Clad Design: Pre-armored assembly eliminates the time-consuming process of pulling heavy gauge conductors through conduit, lowering jobsite labor costs and accelerating project timelines.
3-Phase 4-Wire Power Distribution: Four 8 AWG circuit conductors support 120V/208V 3-phase wye power runs, or dual 40A/50A 120V branch circuits with separate neutrals.
High-Flex Stranded Copper: Built with Class B stranded bare copper conductors to provide superior flexibility, easier pulls, and smooth 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 10 AWG green THHN/THWN-2 insulated stranded copper ground conductor for complete circuit safety.
Engineering Overview
Application: 3-phase branch, feeder, and distribution circuits in commercial, industrial, institutional, and multi-residential power, lighting, control, and signal systems.
Voltage Rating: 600 Volts.
Ampacity: 55 Amps @ 90°C (Based on 30°C ambient temperature per NEC Table 310.16; refer to equipment termination temperature ratings, typically 75°C / 50A, per NEC Article 310; apply derating factors per NEC 310.15(C)(1) when more than three conductors carry current).
Conductor Material: Class B stranded soft-drawn bare copper (4 conductors, 8 AWG).
Insulation: PVC (0.030" thickness) with clear Nylon jacket (0.004" thickness) (THHN/THWN-2).
Grounding Conductor: One 10 AWG green THHN/THWN-2 insulated stranded copper conductor.
Phase Identification: White, Black, Red, Blue phase conductors (120V/208V system color code).
Armor: Overall lightweight aluminum interlocked armor.
Diameter over Armor: 0.819 inches (20.802 mm).
Approximate Net Weight: 412 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) | 8 AWG |
| Conductor Material | Copper |
| Conductor Type | Stranded |
| Outer Diameter (OD) (in/mm) | 0.819 In. |
| Conductor Count | 4 |
| Shield | Unshielded |
| Insulation Type | PVC |
| UL Listing Numbers | UL 83, Ul 1569, UL 1581, UL 2556 |
| Voltage Rating | 600V |
| Ampacity Rating | 55 |
| 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 | 0.412 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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8/4 Stranded Copper MC Cable is a 600V metal-clad cable used for 120V/208V 3-phase 4-wire power distribution, 40A/50A equipment feeders, commercial lighting distribution, and dual-circuit subpanel runs. It features four 8 AWG stranded copper circuit conductors (Black/Red/Blue/White) and one 10 AWG green insulated ground enclosed in an aluminum interlocked armor.
8/3 MC Cable contains three current-carrying conductors (Black/Red/White) plus ground for single-phase 120V/240V or 3-phase 3-wire runs. 8/4 MC Cable adds a fourth conductor (Blue), enabling full 3-phase 4-wire wye wiring (Black/Red/Blue/White) or running two separate 120V circuits with dedicated neutrals in a single cable pull.
Per NEC Table 310.16, 8 AWG copper carries a maximum thermal rating of 55 Amps at 90°C. Standard breaker terminals and equipment lugs are typically rated for 75°C terminations, sizing this cable at 50 Amps for circuit breaker selection.
Yes, in certain installations. When all four conductors are carrying current simultaneously (such as two single-phase branch circuits sharing a single cable sheath), NEC Table 310.15(C)(1) requires an 80% adjustment factor on the conductor ampacity rating.
Yes. Because the aluminum interlocked armor provides continuous mechanical protection, MC 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 8/4 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.
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