Now inspect the terminals of the outlet in the actual position(mounted in a device).Ĭheck the left rectangular port and screw the live wire in it. To wire 30 amps plug, screw the ground wire in the D-shaped terminal. Insert the red multimeter probe inside the ground terminal and the red probe inside both live terminals (left and right).īoth live wires of 50 amp RV should have around 120 Volts. Set your multimeter to the AC voltage to test a 50 amp RV plug (male or female). The ground terminal is at the top (D shaped) and neutral at the bottom. This plug is commonly used for RVs with lower load requirements, such as a microwave or coffee maker.Ī 50 amp RV outlet male or female plug has 4 terminals 2 at the left and right are live terminals. It includes a 120-volt hot wire (live terminal), a neutral, and a ground wire. Frequently Asked QuestionsĪ 30-amp plug has three prongs. If the multimeter reads more than a few volts in the ground and neutral wire, then the ground wire or terminal in an outlet is damaged or improperly connected. If the RV outlet’s ground wiring is fine, the multimeter should read as nearer to zero between the ground and neutral wire because the ground and neutral wires don’t supply current.Ī neutral wire is the backway path for current to complete the loop (circuit), and the ground wire or terminal provides safety for electrical hazards. Your RV outlet wiring(either live or ground wire) has been shorted, and the current is leaking. If the multimeter reads less than 120 in the live wire, such as around 100. Step 3: Evaluate your RV outlet with multimeter results Place the black probe again in the ground port (D) and the red probe in the live port (bottom right rectangular). Now we’ll check the neutral and ground terminal for any current leakage. If your RV outlet (circuit) is fine, then the multimeter should read 120 volts in the live and ground terminal. Place the red probe in the live terminal (rectangular port at bottom left). Insert the black probe’s metal tip inside an RV outlet’s D-shaped (half-round) ground port. Step 2: Insert Multimeter probes in outlet holes(terminals) Select the AC voltage setting( A〜 or ACV) on your multimeter with a higher range, such as min 200V. Insert the black probe in the COM port and the red probe in the VmAΩ port on the multimeter.
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