RV Electrical Load & Shore Power Capacity Calculator (30A vs 50A)
RV owners camping at campgrounds, preventing pedestal breaker trips. Interactive RV power management tool where users check off RV appliances (Rooftop AC #1, Rooftop AC #2, Microwave, Water Heater, Converter, TV) to see if they exceed their 30A pedestal limit.
Step-by-Step Derivation ▼ Show Steps
Calculations adhere to standard electrical engineering physics and National Electrical Code (NFPA 70) regulations.
Engineering Principles & Calculations
This calculator uses the exact mathematical relationships between Service Type (30A 120V vs 50A 120/240V), List of Active Appliances to determine Total Current Draw (Amps), Total Watts, Pedestal Capacity Utilization (%), Overload Alert. In practical installations, factors such as ambient raceway temperature, harmonic distortion, duty cycle continuous operation, and conductor impedance must be accounted for by a certified electrician.
Interactive RV power management tool where users check off RV appliances (Rooftop AC #1, Rooftop AC #2, Microwave, Water Heater, Converter, TV) to see if they exceed their 30A pedestal limit.
Typical Application & Industry Guidelines
RV owners camping at campgrounds, preventing pedestal breaker trips.
RV Electrical Load & Shore Power Capacity Calculator (30A vs 50A) Benchmark Lookup Table
| Common RV Appliance | Running Watts | Starting Inrush Watts | Can Run on 30A Shore Power? |
|---|---|---|---|
| 13,500 BTU Roof Air Conditioner | 1,500 Watts | 3,200 Watts | Yes (Single AC only) |
| 15,000 BTU Roof Air Conditioner | 1,800 Watts | 3,500 Watts | Yes (Leaves 1800W buffer) |
| RV Microwave Oven | 1,200 Watts | 1,500 Watts | Yes (Turn off electric water heater) |
| Electric Water Heater Element | 1,400 Watts | 1,400 Watts | Yes |
| 12V Battery Converter/Charger | 400 - 800 Watts | 800 Watts | Always running background draw |
| Dual Roof Air Conditioners Running | 3,300 Watts | 6,700 Watts | NO (Requires 50A Service) |