Camco has a Power Grip - Circuit Analyzer - 30Amp Plug-Type 125V
Item #: 55310, which is like many of the very inexpensive imported Analyzer/Surge Protectors. Low price, no mention of overvoltage at 132v.
Camco has "Voltage Protector" models, which state they handle over 132v.
Testing is great, but best to use your "power of the press" to make it clear to RVers, many surge protectors will not protect you from brown out or overvoltage. They only protect from a rapid surge, that is considerably above 240v.
Progressive in Southwire RV EMS and surge protectors handle 240 volt over protection. Has anybody tested the inexpensive RV surge protectors, which may not clamp until 300 or 400 volts.
From what I know about basic surge protectors, they won’t protect your 30-amp RV from a 240-volt miswiring condition. But that’s something I can try in my lab as a demonstration. I have a basic Camco 30-amp surge protector that can be sacrificed in the name of science.
Another story - Years ago I hunted out of a horse trailer I converted to RV use. Parked at a friend's newly purchased farm. As I was setting up, I plugged a radio into a 120v recept that was on a nearby power pole. Turned it on and, POW! The 120v household type recept was wired for 220v : hot-hot-neutral. Luckily it only got the radio, which I was able to fix later. I rewired the recept and used it for years. Might have been the last time I plugged in anywhere before metering. I get laughed at occasionally, but it gives me a chance to tell the story.
A neighbor had a licensed electrician wire him a 30 amp trailer outlet. The licensed electrician wired it as a dryer out putting 240 v where 120 v should be. Blew out the inverter, microwave, etc. The licensed electrician got paid before the homeowner plugged in the trailer. He said he did it right and the neighbor mus tree have done something wrong. So much for licensed electricians.
Camco has a Power Grip - Circuit Analyzer - 30Amp Plug-Type 125V
Item #: 55310, which is like many of the very inexpensive imported Analyzer/Surge Protectors. Low price, no mention of overvoltage at 132v.
Camco has "Voltage Protector" models, which state they handle over 132v.
Testing is great, but best to use your "power of the press" to make it clear to RVers, many surge protectors will not protect you from brown out or overvoltage. They only protect from a rapid surge, that is considerably above 240v.
Progressive in Southwire RV EMS and surge protectors handle 240 volt over protection. Has anybody tested the inexpensive RV surge protectors, which may not clamp until 300 or 400 volts.
From what I know about basic surge protectors, they won’t protect your 30-amp RV from a 240-volt miswiring condition. But that’s something I can try in my lab as a demonstration. I have a basic Camco 30-amp surge protector that can be sacrificed in the name of science.
Another story - Years ago I hunted out of a horse trailer I converted to RV use. Parked at a friend's newly purchased farm. As I was setting up, I plugged a radio into a 120v recept that was on a nearby power pole. Turned it on and, POW! The 120v household type recept was wired for 220v : hot-hot-neutral. Luckily it only got the radio, which I was able to fix later. I rewired the recept and used it for years. Might have been the last time I plugged in anywhere before metering. I get laughed at occasionally, but it gives me a chance to tell the story.
A neighbor had a licensed electrician wire him a 30 amp trailer outlet. The licensed electrician wired it as a dryer out putting 240 v where 120 v should be. Blew out the inverter, microwave, etc. The licensed electrician got paid before the homeowner plugged in the trailer. He said he did it right and the neighbor mus tree have done something wrong. So much for licensed electricians.
Residential electricians may never have wired a 30-amp RV outlet before, so you should measure the voltages yourself before plugging in your RV.