Use this Arcon 11827 Power Adapter to convert your 30A L5-30 parallel cable to a 20A 5-R20 socket. This will allow you to connect to household items and other devices other than your RV. Product features:

• Generator Adapter L5-30 to 5-20r - 30Amp twist lock male to 20-amp female
• UV Protected, durable PVC with solid brass contacts
• Bright Yellow for visibility
• Prop 65 Warning