E-stop!

[piercent]

Not specific to BCS but EAO posted an article on e-stop switches including background, relevant standards, codes, and compliances to determine the approriate device. Thought it might be helpful. http://www.newark.com/pdfs/techarticles ... itches.pdf http://www.newark.com/emergency-stop

[shroomzofdoom]

A design by P-J over at HBT uses a 1k ohm-1watt resistor as leakage current to trip the GFCI with the E stop mushroom switch.

This would stop all current at the GFCI breaker and protect the box and it's operator. Since a properly wired GFCI should trip at fraction of this, I thought this to be a pretty safe design when wired properly.

Source: P-J over at homebrewtalk.com

http://www.pjmuth.org/beerstuff/images/ ... -2-4-s.jpg

http://www.homebrewtalk.com/f170/bcs-46 ... ps-288207/

[clearwaterbrewer]

I prefer self sealing circuits http://en.wikipedia.org/wiki/Relay_logic, with the E-Stop having a direct wire to break the power that goes to the contactor that supplies any HV leaving the panel....And that when re-activated, does not automatically energize the contactor... that requires the use of a physical momentary start button ON THE PANEL. (If you have fermenters, they should obviously not be on the same E-Stop as your brewing system)

I have had GFCI outlets 'fail' and keep power on all the time, that is probably why you are supposed to test them monthly or whatever...

You can use both measures with 1 e-stop if you wish, with a NC contact operating the contactor, and the NO contact operating the leakage current to trip the GFCI