Multi meter and pedestal power

pianotuna wrote:
Yup,

And that is one of the several reasons I won't use such so called "protection".

spike99 wrote:
For "safe" voltage range readings, I use 102

Then please provide reliable and verifiable information on what numbers should be used instead of alluding to some "secret handshake" knowledge base that it seems only you might be a member of. The Dometic service manual from 2000 specifies that their ACs are 115V units and have a PROPER operating voltage of between 103 and 126.5V so if you have reliable and verifiable information that those numbers should not be used please provide the source for your information so all of us that believe the ENGINEERS that designed and company that warranties at least the Dometic line of ACs know more than us arm chair engineers can update our benchmarks. I don't have any documented information more recent than the 2000 SM so if someone has a specific document they can cite and hopefully give a link to so we can independently see what it says PLEASE DO.

One can PERSONALLY set any number they want, but when they imply that other lower numbers can/might/could/will cause issues or problems they are SIMPLY MISLEADING those looking for correct and accurate information and are doing IMO a HUGE DISSERVICE to the membership here. Even the engineers at Progressive that designed their EMS to protect such appliances as ACs have spec'd their units for a low/high voltage limits of 104/132. I admit there is some delta in the high end, but at least progressive's low voltage cut out meets Dometic's specification. I don't remember the specs for the SurgGuard, but think the low limit might be 102 which while outside Dometic's specs is only 1V off.

I submit that Dometic WOULD NOT specify a voltage that had even a remote probability of doing damage since that would open them up to unnecessary warranty liability and $$$. Thus I and others I think should be comfortable in taking that 103V figure spec'd by DOMETIC "TO THE BANK" so to speak and if they personally want to use a higher number as I said fine, but make sure they are clear in the number they are using is only a personal one and not one backed by any reliable and authoritative source.

For the O.P. I think you got your basic question answered, but I would like to caution you that simply doing what you propose is a fairly poor way of actually protecting you trailer from voltage issues specifically. Unless you intend to stare at a voltmeter 24/7 while hooked up voltages as CGs are know to vary and unless you have a system that automatically monitors them you are I submit providing almost no REAL PROTECTION since you are only looking an one voltage at one specific time and even then are not measuring it under a load, but open circuit. It's better than nothing, but just barely IMO in the overall scheme of things.

Larry