Yes it will protect you and yes if you have 50a service you will need to use your 50/30 adapter. But you'd have to use that adapter anyway if that was all that was available on the pedestal.
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Tony & Ruth........... FMCA#F416727
2016 London Aire 4519, Freightliner chassis, Cummins ISX, 2018 Jeep Wrangler Unlimited, Blue Ox Avail with AF1. TST 507 TPMS
No amount of money can buy you an extra second of time.
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