1000 MCM 25kV MV-105 EPR/PVC Copper Tape Shield

1000 MCM 25kV MV-105 (Medium Voltage 105°C) Cable is an ultra-high-capacity, single-conductor primary power distribution cable engineered for high-voltage commercial substations, large industrial manufacturing plants, and massive utility infrastructure grids. Designed to handle extreme electrical loads safely at an elevated continuous conductor temperature of 105°C, this heavy-duty cable features a 1000 kcmil (MCM) stranded bare copper conductor, premium Ethylene Propylene Rubber (EPR) primary insulation, a triple-extruded concentric electrostatic shielding layout, a 5-mil metallic copper tape shield, and a rugged, flame-retardant Polyvinyl Chloride (PVC) outer jacket.

This medium-voltage infrastructure cable is optimized for main utility feeder trunks, heavy substation transformer links, and industrial plant distribution loops requiring maximum amperage capacity. It is engineered for optimal performance in wet or dry locations, and can be placed in underground ducts, structural conduits, direct burial trenches, or open-air cable trays where proper grounding mechanisms are maintained.

AMPACITY RATINGS (NEC Table 310.60)

The following ratings are baseline engineering values for a single conductor copper 1000 MCM 25kV MV-105 cable operating at 105°C under standard National Electrical Code configurations:

• In Underground Duct (Three Circuits / One Duct Bank): ~550 – 590 AMPS Calculated based on standard 20°C earth ambient temperature, 90% load factor, and typical soil thermal resistivity (Rho 90) parameters.

• Direct Buried (In Triplexed or Bundled Configuration): ~640 – 690 AMPS Sized for direct earth installation with adequate spacing, assuming standard soil moisture and thermal dispersion.

• In Isolated Air (In Open Cable Trays / Racks): ~910 – 980 AMPS The highest available capacity rating. This configuration relies on continuous free-air circulation to dissipate massive inductive core heat at a maximum 40°C ambient air temperature.

Industry Standard Single-Value Listing

If your application or catalog requires listing one single, definitive ampacity rating for this cable, the industry standard baseline is:

• Ampacity: 565 Amps (Underground Duct Bank / 105°C Conductor / 20°C Ambient)

This 565A baseline is the standard reference because underground duct banks are the most common commercial installation method, and this rating safely maximizes standard medium-voltage grid equipment parameters without exceeding physical thermal constraints.

Key Features

• 105°C Continuous Thermal Performance: Certified for an elevated 105°C normal operating temperature, allowing for significantly higher ampacity capacities compared to standard 90°C medium-voltage lines, as well as 130°C emergency overload and 250°C short-circuit thresholds.

• Premium EPR Insulation Performance: Ethylene Propylene Rubber (EPR) provides exceptional dielectric strength, superior resistance to corona discharge, electrical tracking, and treeing, and remains highly flexible over a wide range of operating temperatures.

• Advanced Tape Shielding System: Utilizes a triple-extruded manufacturing process consisting of a semi-conductive conductor shield, the primary high-dielectric EPR insulation layer, and a semi-conductive insulation shield, wrapped with a helical 5-mil bare copper tape shield (minimum 12.5% overlap) to evenly distribute electrical stress and safely channel fault currents.

• Excellent Moisture and Chemical Resistance: The outer extruded PVC jacket combined with thermoset EPR insulation forms an impermeable barrier against moisture ingress, oil tracking, industrial chemical spills, and ultraviolet decomposition.

• Rigorous Medium-Voltage Certifications: Fully certified to pass the demanding electrical, physical, and flame-propagation benchmarks mandated by AEIC CS8, ICEA S-93-639, UL 1072, and IEEE 1202.

Common Applications

• Primary Utility Feeder Loops: Supplying main power distribution trunks from electrical utility substations into large-scale commercial complexes, master-planned developments, and institutional campuses.

• Industrial Plant Infrastructure: Routing high-amperage sub-station loops, heavy-duty processing mill connections, grid ties for generation plants, and primary distribution in chemical refineries or automated manufacturing plants.

• Renewable Energy Grid Integration: Serving as the core underground collector system network for wind generation towers and large-scale utility solar arrays connecting back to main step-up transformers.

• Conduit and Duct Bank Utility Routes: Pulling robust high-voltage circuits through concrete-encased underground duct banks, utility tunnels, or structural vertical shafts.

• Hazardous Environment Deployment: Approved under strict National Electrical Code provisions for installation within Class I, Division 2 hazardous industrial environments.

Cable Layer Architecture (From Core to Jacket)

To handle 25,000 volts safely, medium-voltage cables use a highly specific concentric layout rather than simple conductor-and-jacket configurations:

1. Conductor: 1000 MCM (kcmil) compact or compressed stranded bare copper.

2. Conductor Shield: Extruded semi-conducting thermosetting polymer layer to eliminate voltage concentrations at the conductor strands.

3. Primary Insulation: Thermoset Ethylene Propylene Rubber (EPR) available in standard thickness profiles:

   • 100% Insulation Level: Sized for cleared grids where ground faults are automatically isolated within 1 minute.

   • 133% Insulation Level: Sized with added thickness for ungrounded or delayed-clearing networks where a fault may persist for up to 1 hour.

4. Insulation Shield: Extruded semi-conducting thermosetting layer over the insulation core ensuring uniform radial electrical stress distribution.

5. Metallic Shield: Helically applied bare copper tape layer (5-mil minimum thickness) to carry charging current, provide a path for fault currents, and complete the shield grounding track.

6. Outer Jacket: Extruded Black Polyvinyl Chloride (PVC), distinctly marked with surface-printed identification text indicating voltage, size, listing, and sequential footage.

Technical Specifications

• Conductor Size: 1000 MCM (kcmil)

• Voltage Rating: 25,000 Volts (25kV)

• Conductor Material: Stranded Bare Copper

• Insulation Type: Premium EPR (Ethylene Propylene Rubber)

• Insulation Level: 100% or 133% (Specification Dependent)

• Shielding Type: Helical Copper Tape Shield (5-mil minimum thickness)

• Jacket Material: PVC (Polyvinyl Chloride) - Black

• Maximum Temperature Rating: 105°C Normal / 130°C Emergency / 250°C Short Circuit

• Flame Test Ratings: IEEE 1202 / UL 1685 Vertical Tray Flame Test, FT4

• Compliance Standards: UL 1072 (Type MV-105), ICEA S-93-639 / NEMA WC74, AEIC CS8, RoHS Compliant

Technical Note: When engineering layouts or terminating 1000 MCM 25kV MV-105 cable, specialized medium-voltage execution protocols must be strictly followed due to the immense physical size, heavy weight, and stiff profile of the line. The installer must account for the Minimum Bending Radius constraints to prevent structural damage to the tape shield and primary insulation core. Per NEC Article 300.34, the minimum bending radius during installation is typically 12 times the overall cable diameter for tape-shielded lines.

Additionally, this cable requires proper medium-voltage stress cones or termination kits at all transition points, splice intersections, and equipment lugs. Simply stripping back the jacket and connecting the conductor without an engineered stress relief device will result in immediate tracking insulation failure and catastrophic flashover due to the concentrated radial electrical stresses at the shield termination cutoff boundary.

CABLE TYPE: 1000 MCM Single-Conductor 25kV Shielded EPR/PVC Type MV-105 Power Cable

DISCLAIMER: The technical information provided is for general reference only. Medium-voltage power distribution networks, sub-station layouts, and high-voltage terminations must strictly adhere to the National Electrical Code (NEC), National Electrical Safety Code (NESC), local utility engineering mandates, and certified industrial safety rules. Always cross-reference the official product submittal data sheet from the chosen manufacturer prior to finalizing electrical layout designs, structural pulling calculations, or cutting structural cable lengths.

General Shipping Information

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 Shipping

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).

Returns

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.