“The industry standard for maximum-capacity 600V single-phase overhead utility drops, heavy commercial service entrances, and primary temporary power distribution requiring 19-strand phase conductors and a full-size neutral messenger. Engineered for dependable 600V aerial power delivery from utility lines to building weatherheads, this 3-conductor triplex cable features two 336.4 MCM insulated aluminum phase conductors, heavy-duty weather-resistant XLP insulation, and a matching bare 336.4 MCM steel-reinforced ACSR neutral messenger built to withstand extreme environmental strain.”

Key Features & Benefits: 336.4 MCM Triplex Overhead Service Drop Cable

The 336.4 MCM Limpet Triplex Cable is designed for industrial and commercial-grade overhead secondary power distribution requiring maximum ampacity and a full-size neutral conductor to handle heavy unbalanced loads or utility specifications. Designed to span long overhead distances from utility pole transformers to service masts, it provides a high-capacity, sag-resistant solution for heavy-duty service drops and temporary construction power feeds.

By pairing two 19-strand 1350-H19 series 336.4 MCM aluminum phase conductors with a heavy-duty 336.4 MCM 18/1 ACSR neutral messenger, Limpet triplex delivers 420-amp capacity with 8,680 lbs of mechanical break strength. The extra-thick 80-mil cross-linked polyethylene (XLP) insulation offers superior protection against severe UV rays, freezing rain, and harsh industrial environments.

• 600V Heavy Industrial Aerial Reliability: Rated for continuous 600V max aerial service at conductor temperatures up to 90C with XLP insulation.

• Full-Size 18/1 ACSR Messenger: Features a matching 336.4 MCM steel-reinforced ACSR neutral messenger delivering 8,680 lbs of breaking strength to prevent sag and withstand severe ice, wind, and extreme span loads.

• Extra-Thick 80-Mil Weather-Resistant XLP: Heavy-duty black cross-linked polyethylene insulation prevents UV degradation, cracking, and moisture damage in severe outdoor environments.

• Cut to Length by the Foot: Order only the exact span length needed for your project, eliminating jobsite waste and unused spools.

Technical Specifications: Limpet 336.4 MCM Triplex Overhead Cable

• Application: Overhead secondary power drops (600V max) from utility pole to weatherhead, heavy commercial service feeds, and primary temporary jobsite power.

• Code Word: Limpet.

• Voltage Rating: 600 Volts Maximum (Phase-to-Phase).

• Phase Conductors Size & Stranding: Two (2) 336.4 MCM (19-strand 1350-H19 Series Aluminum).

• Neutral Messenger Size & Stranding: One (1) 336.4 MCM ACSR Full-Size Neutral (18 Aluminum / 1 Steel Strand).

• Messenger Breaking Strength: 8,680 lbs.

• Insulation Material: Black Cross-Linked Polyethylene (XLP).

• Insulation Thickness: 0.080 inches (2.03 mm).

• Nominal Outer Diameter: 1.72 inches.

• Approximate Cable Weight: 1,161 lbs per 1,000 ft.

• Ampacity (90C XLP Conductor): 420 Amps.

• Ampacity (75C Poly Conductor): 325 Amps.

• Compliance & Standards: ASTM B-230, ASTM B-231, ASTM B-232, ICEA S-76-474, RUS Accepted.

Common 336.4 MCM Limpet Triplex Overhead Applications

• High-Capacity Commercial Service Drops: Single-phase power runs from utility pole transformers to commercial weatherheads, industrial subpanels, or large agricultural service entrances requiring up to 400A service with a full neutral.

• Heavy-Duty Temporary Construction Power: Overhead power delivery for massive jobsite temporary service poles and main distribution switchgear.

• Industrial & Agricultural Facilities: Aerial power supply to heavy workshops, barns, manufacturing facilities, and outbuildings.

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.

Ampacity Reference:Based on conductor temperature of 90C for XLP (75C for Poly), 40C ambient temperature, 0.9 emissivity, and 2 ft/sec wind in full sun. Reference applicable NEC articles for site-specific installation guidelines.