“A dependable industrial and commercial choice for heavy 3-phase feeder systems, branch circuits, and main service sub-panel installations requiring a neutral conductor. Engineered with a lightweight, interlocking aluminum armor jacket, this pre-protected 4-conductor plus ground assembly eliminates the extensive material and labor expenses of traditional conduit piping. It allows electrical crews to route heavy service lines directly through walls, ceilings, and open cable trays in a fraction of the time.”

Key Features & Benefits: 250-4 Aluminum MC Cable w/ Ground

250 MCM 4-Conductor Aluminum Metal Clad (MC) Cable delivers a completely code-compliant, pre-armored wiring solution designed to minimize field labor hours and maximize jobsite efficiency. Featuring four compact-stranded AA-8000 series aluminum phase conductors insulated with cross-linked polyethylene (XLPE/XHHW-2) and a dedicated bare grounding wire, the assembly is protected by an overall interlocking aluminum armor jacket.

• Labor-Saving Armor: The integrated aluminum interlocked armor serves as its own flexible metallic protective raceway, removing the tedious labor of bending and installing separate EMT or rigid conduit systems.

• AA-8000 Conductor Material: Manufactured with compact-stranded 8000-series aluminum alloy to ensure high electrical conductivity, dramatically reduced weight strain during long structural pulls, and excellent flexibility.

• XHHW-2 Insulation: Individual phase conductors are insulated with cross-linked polyethylene (XLPE), providing elite resistance to heat, moisture, and electrical stress in challenging industrial environments.

• Maximum Versatility: Code-approved for an exceptionally broad range of heavy-duty installations including 3-phase commercial distribution panels, large equipment feeders, vertical risers, and environmental air-handling spaces (plenums).

• Cut to Length or Bulk Spools: Order custom cut-to-length footage to eliminate jobsite waste, or select full factory spools and reels for major commercial installation pulls.

Technical Specifications: 250-250-250-250 Aluminum Metal Clad (MC) w/ Ground

• Conductor Configuration: 4 Insulated Conductors + 1 Bare Ground Wire

• Conductor Size: 250 MCM (kcmil)

• Conductor Material: AA-8000 Series Compact Stranded Aluminum Alloy (per ASTM B800 & B801)

• Conductor Colors (240V ): Black, White, Red, Blue

• Ground Wire Size: 1 AWG (Bare Stranded Aluminum)

• Insulation: High-Heat & Moisture Resistant Cross-Linked Polyethylene (XLPE / Type XHHW-2). A binder tape is wrapped over the insulated conductors’ assembly.

• Armor: Overall Aluminum Interlocked Armor

• Voltage Rating: 600 Volts

• Temperature Rating: -40C to 90C

• Amp Rating (@ 75C – NEC): 205 Amps

• Amp Rating (@ 90C – NEC): 230 Amps

• Insulation Thickness: 0.065 inches

• Diameter Over Armor: 1.99 inches

• Net Weight: 1,600lbs per 1,000 ft

• Minimum Bending Radius: 13.93inches (Calculated as 7x Diameter Over Armor)

• Compliance Standards: UL 44, UL 1569 for Type MC Cable (CT Use Rated), NEMA WC-70/ICEA S-95-658, IEEE 1202 70,000 BTU/HR Vertical Tray Flame Test, ASTM B800 & B801, NEC 518.4, NEC 520.5, NEC 645.5, and NEC 300.22 for environmental air-handling spaces (plenums).

Common 250 MCM 4-Conductor Alum MC Cable Applications

• 200A225A Sub-Panel Feeds: Primary 3-phase, 4-wire feeder lines running from main distribution switchboards to 200A or 225A sub-panels in commercial distribution centers, retail stores, and multi-tenant commercial facilities.

• Heavy HVAC & Mechanical Systems: Direct power feeds for large rooftop HVAC units (RTUs), commercial chillers, air compressors, and industrial refrigeration equipment requiring a dedicated neutral.

• Open Plenum & Drop-Ceiling Routing: Fully certified under NEC 300.22 for routing directly through environmental air-handling plenum spaces, dropped ceiling voids, and raised floors without conduit.

• Commercial EV Charging & Transformers: Reliable power distribution for commercial EV charging hubs, battery backup systems, and 480V-to-208V step-down transformer connections.

• Multi-Story Vertical Shafts: Approved for vertical riser shafts in multi-family residential and high-rise commercial structures when secured per NEC 300.19 and 330.30 guidelines.

Technical Note:All values are nominal and subject to industry tolerances and manufacturer corrections. Specifications are subject to change without notice. It is the buyers responsibility to verify that all materials meet the specific requirements of the project and comply with local electrical codes. Reference NEC Article 330 for specific Metal-Clad installation guidelines.

Ampacity Note: Values calculated based on National Electrical Code (NEC) standards. Because most standard commercial electrical panels, breakers, and terminal lugs feature 75C termination points, circuits are typically designed based on the conservative 205-Amp standard. The 230-Amp rating at 90C is highly utilized for ampacity adjustment and correction factors.