Thread Tools Display Modes
Old 11-11-2013, 07:16 PM   #11
Jack of All Trades
RJHuser's Avatar
Join Date: Oct 2010
Location: Fletcher, Ohio
Posts: 282
GFCI's work by comparing the current in the hot wire to the current in the neutral wire. If there is an imbalance, in the order of a few milliamps, the GFCI will trip. The GFCI assumes the imbalance is caused by current leakage to another path, such as to the ground connector or through a body to ground.

In a RV, a common source of this leakage current is the 12 volt convertor, especially the "newer" (post 1980-1990 era) switching type power supplies. These type of convertors commonly have input RFI suppression to keep high frequency energy off the incoming power wiring. These filters typically leak several milliamps to ground as there normal function. As they age, the leakage current can increase (that's why a GFCI might not trip when the RV or converter is new, then after a period of time the GFCI starts to trip). This leakage current can be high enough to trip a GFCI on the shore power.

Also, using more than one GFCI's in series can cause nuisance trips. The normal operation of the sensing circuitry in the GFCI can cause an apparent current leakage in an upstream GFCI. Again, as the GFCI ages, this apparent leakage current can increase. This can occur in a sticks and bricks house as well as in a RV.


Rick & Debbie; Brandy & Schnoodle (Dexter & Fritz R.I.P.) the Doxie "Kids"
2015 Jayco Pinnacle 36RSQS 5'er
2018 GMC Sierra Denali 3500HD, 6.6L Diesel Dually; B&W Companion 5'er hitch
ScanGauge, TST 507 TPMS
RJHuser is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Featured Campgrounds

Reviews provided by is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 03:33 PM.