GFCI for Engine block heaters

[LarryFine]

Re: GFCI for Engine block heaters

Originally posted by triphase:
If the current going out differs between 4 and 6 milliiamps from the current going back it will trip!

There is absolutely no correlation betwixt voltage drop and GFCI tripping. As long as there is no external-to-the-cord current path to earth, the current in both circuit conductors is the same. Voltage drop is irrelevant.

 

[RockFish]

Re: GFCI for Engine block heaters

Nuisance trips of 5ma GFCI Breakers are common when supplying self-regulating electric heating elements.
Seems that you may have an application for EPD Breakers, which are used for electric heat trace. They trip at approx. 30ma fault current.

 

[iwire]

Re: GFCI for Engine block heaters

Originally posted by RockFish:
Seems that you may have an application for EPD Breakers, which are used for electric heat trace.

It may be a application could use them but I do not think the code will allow it for this application.