No 50 AMP on shore power

1. Doubt the Transfer switch is bad. It is extremely rare for a transfer switch to only close 1 leg of power.
2. Your EMS senses the OUT OF PHASE 2 -120 legs of power. IF those 2 legs are on the same phase, the EMS assumes you have 30 amp service
3. VERIFY that you have double the line voltage between the 2- 120 legs at the 50 amp service pole(3 and 9 position). IF NOT, you do not have 50 amp service. But, "Cheated" 50 amp service. Cheated is a 50 amp breaker on the same phase supplying ONLY power on a 50 amp breaker and not a TOTAL of 100 amps which is true 50 amp service
4. EMS systems do not have to be "set" to 50 amp service. It is Automatic when connected to true 50 amp service. You cannot even change to 30 or 20 if on 50 amp service.
Do these tests and post. Doug

Perhaps your Energy Management System is not set for 50 amps.

I am connected through a portable Progressive surge protector which shows correct wiring and 50 amps. Everything works inside the MH but I cannot run both a/c units unless I turn off something (like the water heater). The transfer switch has no problem switching between genset and shore power. Something is just not letting 50 amps through.

I would guess that you have lost one leg of your input line/plug to your coach.

hanko wrote:
with your voltage tester, check to see if you have 230 volts between phases at the park pedestal, if you do, the problem is inside the coach. Possible a transfer switch issue or a bad two pole 50 amp breaker in the panel

the OP CLEARLY said he has correct voltage at park supply

with your voltage tester, check to see if you have 230 volts between phases at the park pedestal, if you do, the problem is inside the coach. Possible a transfer switch issue or a bad two pole 50 amp breaker in the panel

TNGW1500SE wrote:
Do you mean you're only getting one phase of the 50 amp? Are all your 110 volt devices working or are some things dead?

what was asked already see previous post?

Do you mean you're only getting one phase of the 50 amp? Are all your 110 volt devices working or are some things dead?

jswat wrote:
A new problem for me, I can only get 30 AMP coming into my coach even though I am connected to a 50 AMP OUTLET. The outlet checks good with my multimeter. When I switch to the genset I have full power. Could this be a failure of the transfer switch? I have the IOTA ITS-50R switch. My coach is a 2004 HR Ambassador.

how do u know your only getting 30 amps? even if your getting 30 amps you should have full power to all systems just not the same amperage
draw capabilitys?

or did u mean to say when on shore power I only get power to part of the coach? that could mean you have a bad 120V leg at the ATS from SP cord
pull the cover off the ATS and when on SP check the voltage at the two black wires or maybe one black and one red where they feed into the MH (out lines)