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11-17-2019, 10:36 PM
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#1
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Senior Member
Join Date: Aug 2019
Location: Rapid City
Posts: 218
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Double surge protectors
Being new to RV'ing (32RTLS on order delivery January) but not new mechanics and electrical systems I have been reading various opinions on where to place a surge protector (PI EMS50 hardwired).
PI strongly suggests to install before the TS thus protecting everything downwind, individuals think after the TS to protect from shore and generator.
The thought after the TS, a surge would blow the TS and then you are out of power period until repaired. Before the TS, the TS is protected but possible mishaps from generator. I just started, please give me grace.
Would it be possible maybe to have both worlds made in heaven? 1) SP before the TS and 2) another after the TS ? Have no clue if that would work!
or maybe that's just dumb!
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11-17-2019, 10:50 PM
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#2
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Lost in the Woods
Join Date: Apr 2019
Location: Ocean County
Posts: 2,807
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On most, there's a delay before power is sent when you fire up the generator. I haven't heard of a spike issue from the genny side yet, just from the CG and pedestal side.
That said, there are different opinions... hardwired versus portable. Some people have the same worry as you mounting AFTER the TS. If the EMS goes poof, you have no power. Same with the hardwired units before the TS. It malfunctions, no power to the rig.
With a portable unit, if it goes poof, you have a option to plug in directly without it and still get power to the rig... tough decisions....
If it was me, and money is no object, two portable EMS units (one as a backup).
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11-17-2019, 11:15 PM
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#3
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Senior Member
Join Date: Aug 2019
Location: Rapid City
Posts: 218
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Did I get this right, if there is a surge the EMS (hardwired before TS ) fries? Not self protected? I most likely will carry a portable unit in the event the hardwired self destructs, they are not that expensive.
I haven't called PI yet.
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11-17-2019, 11:29 PM
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#4
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Lost in the Woods
Join Date: Apr 2019
Location: Ocean County
Posts: 2,807
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The EMS will protect a surge, no matter where it's located in the circuit. All the TS does is determines where the power is coming from (shore or genny), and sends it to the electrical panel. There's no protection built in at the TS.
The gennys have their own regulators on them, to regulate/stabilize power, so I haven't heard anyone putting a EMS after the genny output, or between the TS and the electrical panel.
Most surges or low voltage conditions come from the shore power direction, so having the EMS there, outside before it goes into the rig, is the most common place.
The question is, if you have a hardwired one onboard, and it fries, I'm not sure a second, outside portable one, will do anything for you, if power isn't passing through the dead hardwired unit.
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11-18-2019, 10:20 AM
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#5
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Senior Member
Join Date: Aug 2019
Location: Rapid City
Posts: 218
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My question was answered in full. My solution:
EMS hard wired before TS, carry a spare portable, and if EMS fries in no mans land - remove EMS, splice wires together and plug in portable until a new EMS is had if not on gen.
That will work, worries over. Thanks guys!
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11-18-2019, 10:34 AM
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#6
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Senior Member
Join Date: Mar 2015
Location: Port Orchard
Posts: 2,064
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My EMS is hardwired in between transfer switch and converter. If the genset has a problem, the converter and house is protected. Yes, the genset may have some built in safety but my preference is to wire it this way. If the TS gets hammered, it's easy enough to wire around it temporarily.
__________________
Don
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11-18-2019, 01:59 PM
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#7
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Site Team
Join Date: Apr 2012
Location: Newark, NY
Posts: 15,932
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Quote:
Originally Posted by Edutron
My question was answered in full. My solution:
EMS hard wired before TS, carry a spare portable, and if EMS fries in no mans land - remove EMS, splice wires together and plug in portable until a new EMS is had if not on gen.
That will work, worries over. Thanks guys!
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That sounds like a good plan!
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Think you're too old to cry or swear out loud...walk into your hitch in the dark.
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2016 Ford F150 XLT 2X4 SC 3.5L Eco Max Tow
2010 Tundra TRD DBL Cab (Traded)
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