SE-U (UL 44) Service Entrance Cable

1. Model Definition & Compliance Standards

Full Name

SE = Service Entrance Cable U = Style U, flat parallel construction Individual insulated conductors comply with UL 44 (XHHW-2 thermoset insulation); the whole service cable is also certified under UL 854 and governed by NEC Article 338.

Voltage & Installation Restriction

Rated voltage: 600V AC Continuous operating temperature: constant 90°C for dry & damp outdoor locations Critical NEC rule: approved only for overhead aerial routing and exterior wall mounting; direct underground burial is strictly prohibited

2. Internal Construction (Flat Parallel Layout, Inner to Outer)

1. Conductor Class B compact stranded bare copper or AA8000 series aluminum alloy (dominant for residential use). Standard gauge range: 6AWG ~ 4/0AWG. Unique concentric neutral grounding: bare copper strands helically wrapped around the two phase conductors, integrated ground design eliminates separate ground wiring.

2. XLPE Insulation Thermoset cross-linked polyethylene, listed XHHW-2 per UL 44, sunlight & moisture resistant; phase cores color-coded black and red for easy field termination.

3. Reinforced Binding Tape Glass-fiber reinforced tape wraps the assembly to lock the flat parallel structure and resist abrasion.

4. Overall Outer Jacket Light gray sunlight-resistant flame-retardant PVC sheath, protects against UV radiation, rain and outdoor aging.

3. Key Technical Specifications

Rated voltage: 600V AC Continuous temperature: 90°C dry & damp locations Short-circuit withstand temperature: max 250°C Cold bend performance: no cracking at -25°C Flame rating: UL VW-1 Weather resistance: UV stabilized, rainproof, mild salt spray tolerant Minimum bending radius: 7.5 times overall cable diameter Installation allowed: overhead service drop, exterior wall fixture, under eave routing; underground burial forbidden.

4. Core Advantages

1. Streamlined flat design ideal for aerial overhead installation Parallel dual-phase layout plus integrated concentric ground creates a slim profile with low wind load, easy to attach along building exteriors and under roof eaves.

2. Stable ampacity for full household power demand XHHW-2 insulation delivers consistent 90°C current carrying capacity, sufficient for residential heavy loads including air conditioners, water heaters and large appliances.

3. Cost-effective aluminum alloy option AA8000 aluminum is lighter than copper, minimizes line sag for long overhead spans and reduces support hardware load, widely adopted for suburban residential districts.

4. Excellent outdoor weather durability Combination of XLPE inner insulation and UV-resistant PVC outer jacket resists long-term outdoor exposure, with a service lifespan of 30~40 years.

5. Simplified field termination Built-in concentric ground removes the need for separate ground wire installation, drastically shortening wiring time at meter bases.

5. Application Scope

1. Overhead service drop for single-family houses, suburban rural homes from utility poles to residential meter boxes

2. Exterior overhead power feed for small suburban retail stores

3. Exterior wall wiring for coastal towns with mild salt fog conditions

4. Power supply for standalone farm houses and small workshops

5. Renovation replacement for aged overhead residential service lines