Snownyet,
It is truly 100A like you originally said. It is two 50A poles (standard term 50A 240VAC).
Decades ago, if you really had a nice RV, you had 30A service (1 110VAC circuit). Parts for the 30A 110VAC was commercially available, but rare.
When RVs moved on the the next step with W/D, AC, (electric fireplaces), more power was needed and 30A was the maximum available standard for 110VAC. The next logical step would have been 30A 240VAC like your dryer uses, but the industry stepped all the way up to a full 50A 240VAC like what is used in an oven/range. All parts were commercially available, however because most RVs do not use 240VAC appliances, it gets confusing to think we actually have 100A available for 110VAC equipment.
If your breaker at home is 2 - 25A poles, it would be correctly termed 25A 240VAC I believe, not 50A. Your house main service is probably 150A 240VAC, meaning you have 150A available on each leg, or 300A total power available for 110VAC appliances.
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