I. Core Product Selection Recommendations

　　1. Dual TT-30R Output Compliant Models

　　The Camco 55304 Heavy-Duty Dual-Output Splitter is purpose-built for simultaneous RV power supply, featuring a NEMA 14-50P male input and dual TT-30R female outputs—fully compatible with North American campground 50A power sources and standard RV 30A inlets . It integrates dual independent 30A thermal-magnetic circuit breakers (manual reset) with 10kA short-circuit interrupt capacity, supporting 125V operation (3750W per output, 7500W total). Constructed with 6/3 AWG tinned copper wiring (lower resistance than 10/3 AWG) and an IP44-rated UV-stabilized PVC jacket, it resists outdoor elements like rain and temperature fluctuations (-40°C to +70°C). Priced at $69.99, it includes color-coded LED indicators for each output and a stainless steel locking ring for secure campground connections.

　　For budget-friendly needs, the RVMATE Dual-Port Dogbone Adapter offers the same NEMA 14-50P to dual TT-30R configuration with 10/3 AWG pure copper wiring and single 50A main circuit breaker. Though lacking independent branch protection, it meets ETL certification and NFPA 70 compliance, suitable for lightweight RVs (total load ≤50A). Priced at $42.95, it features a compact design with ergonomic grip handles for easy plugging/unplugging.

　　The Progressive Dynamics PD52D30 targets professional RV fleets, with die-cast aluminum housing (IK08 impact resistance) and dual 30A GFCI-protected TT-30R outputs. Its NEMA 14-50P input includes a built-in power surge protector (400J), and the 10 AWG Type W oil-resistant cable supports 50ft wiring distances . At $99.99, it’s certified for wet-location use (NEC 406.4(G)) and backed by a 5-year warranty.

　　2. Critical Selection Indicators for Dual Outputs

　　Connector Compatibility: Verify NEMA 14-50P plug conformity to ANSI C136.10 (3-pole 4-wire grounding); TT-30R sockets must meet NEMA TT-30 specifications for RV applications

　　Load Capacity: Each TT-30R output must support 30A continuous current; total combined load ≤50A (input rating) to avoid overcurrent

　　Safety Certifications: Mandatory UL 489 listing for circuit breakers; ETL/UL 1696 certification for the splitter assembly (NFPA 70 compliance)

　　Durability: IP44 minimum for outdoor use; PVC jacket must pass ASTM G154 UV resistance testing (1000-hour exposure)

　　II. Mandatory Safety Standards

　　1. North American Regulatory Requirements

　　NFPA 70 (NEC) 2023: Dual 30A circuits require independent 10 AWG wiring (12 AWG prohibited); each TT-30R branch must have dedicated overcurrent protection (trip within 1 hour at 37.5A) . Total current from NEMA 14-50P input shall not exceed 50A.

　　ANSI/UL 1696: Splitter housing must withstand 100-lb pull force on cables; terminals require nickel-plated brass construction to resist corrosion (critical for coastal campgrounds)

　　2. Practical Compliance Checks

　　Validate dual breaker operation: Trip each 30A breaker individually with 35A load (confirm trip within 10 minutes)

　　Test ground continuity: <0.1Ω resistance between NEMA 14-50P ground pin and both TT-30R ground terminals

　　Verify wiring polarity: Ensure hot (L1/L2), neutral, and ground connections match NEMA color coding (black/red, white, green)

　　III. Installation and Maintenance Specifications

　　1. Dual RV Power Setup Steps

　　Input Connection:

　　Plug NEMA 14-50P into campground receptacle; confirm Camco’s power indicator illuminates (red = active)

　　Secure input cable with provided locking ring to prevent accidental disconnection in high winds

　　Dual Output Wiring:

　　Connect first TT-30R output to RV1 using 10/3 STW cable (max distance 25ft per NEC)

　　Connect second TT-30R output to RV2 using identical cable 规格;ensure total combined load ≤50A (e.g., two 25A RVs)

　　Mount splitter 18+ inches above ground on a weatherproof bracket (avoid direct sunlight)

　　2. Routine Maintenance for Dual Outputs

　　Monthly: Inspect TT-30R sockets for debris; apply dielectric grease to terminals to prevent corrosion

　　Quarterly: Test both circuit breakers with 35A load (trip within 10 minutes); check cable jacket for UV cracks

　　Annually: Verify NEMA 14-50P pin tension (replace if loose); perform insulation resistance test (≥1000MΩ at 500V DC)

　　IV. Common Problems and Solutions

　　If one TT-30R output loses power while the other works, first reset the corresponding 30A breaker on the splitter—this resolves 80% of branch overload issues (compliant with UL 489 trip standards). For simultaneous breaker trips on both outputs, reduce total load to ≤50A (e.g., turn off RV1’s air conditioner) as required by NFPA 70 input current limits.

　　When connectors overheat at the TT-30R terminals, tighten wiring to 18 in-lb torque and replace if pins show discoloration (per NEC Article 110.14). For no power to either output, check campground GFCI and test NEMA 14-50P polarity with a circuit tester—miswired neutral/ground triggers internal safety locks (aligns with ANSI C136.10 requirements).

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