Only getting 30A indicated on 50A connection

CatchinBluegill wrote:
I recently bought a 2009 Bounder 35H, it has 50A service via an Intellitec Smart EMS, model 900.

I had my electrician (licensed, bonded, experienced, has been doing work for my family for many years and has never messed anything up) add a 50A-240V circuit for shore power, and the voltages test correctly at the socket, as described in this thread.

Measured voltage is 235V across the outside pair, and 118 on each of the 120V pairs.

However, the panel only reports 30A service, among the choices of Gen Set, 50A, 30A, 20A.

I measured voltage at the RV end of the power cable, and am seeing a lot of voltage loss. Measured voltage at the RV end of the cable is 185 across the outside pair, and 88V on the 120V legs. I'm losing 60V on the 240 and (consistently), 30V on each of the 120V legs, over a 25 foot cable.

Is this just a bad power cable, or do I need to look for some other issue? When I got the RV, there was a gap of about 1/2 inch between the end of the outer cable jacket and the male plug, so I had my electrician replace that plug at the same time he installed my 50A circuit, but perhaps some evil lurks in the heart of that cable anyway?

Thanks!

pull the ats cover off and measure the voltage coming in/out of the ATS
if its still low I will assume bad plug at house outlet or bad wire in the 25 cord
someone suggested a crossed G+N seeing as there almost the same thing iam not seeing that as causing voltage drop in a power cord however
its a extremely unsafe way to wire and the gfi may not work as required .I doubt the electrician did this in this case
also make sure there is zero draw in motor home when measuring the voltage as it comes into the ATS. SO TURN turn off the dual 50 amp main breaker in the MH panel