Thor Forums

[PEHetzer]

Keep in mind that a 20 ampere shore power panel utilizes smaller conductors which can result in a higher voltage drop then what would be experienced with a 50 ampere service panel. At best a 20 ampere circuit should not see more then 15 amperes of load, while a 30 ampere circuit should see no more then 24 amperes. A 50 ampere circuit should have no problems with a 40 ampere load. These loads are engineered to prevent severe voltage drops.
Also, the distance between the "hotel" service outlet and the main service panel can have an effect too. My RV required a 30 ampere service panel, which I fed using a AWG#6 sized cable. The 30 ampere outlet is located aproximately 150 feet from my service panel, so I slightly oversized the conductors. As a result, I can run everything from my "hotel" service without problems along with an air compressor to checl tire pressure.
As any circuit load increases, the circuits voltage will drop resulting in increased amperes. As more load is added voltage critical components may stop working or the increased load may trip a circuit breaker. Eliminating the voltage drop is key!