I'm pretty sure that US spec GFIs are required to meet an 'inverse time' spec. IE: Trip in X ms at 7ma Trip in Y7ma etc. ie: the higher the current the quicker the trip Bob Ammerman RAm Systems ----- Original Message ----- From: "Sean Alcorn - Avion Sydney" To: Sent: Friday, November 01, 2002 8:34 PM Subject: Re: [PIC]: Direct LED connection? > Bob, > > > I am sure you use higher voltages than 415 for neighborhood > > distribution, > > don't you?!? Otherwise you'd use an awful lot of Cu or Al. > > I have a delightful 11000 volts in the corner of my front yard. I'll > wait until the garden overgrows for a little camouflage before I put it > on the market. On a quiet night, I can hear a distant buzz! :-) > > So yes, we have 33kV and 11kV transformers scattered around the place. > I can not remember what it originates at the stations - it's been far > too long. I was simply referring to the common supply lines. > > > I believe GFIs in the US are supposed to trip at 7 or more ma. > > I have often wondered about this. I have done some paramedics training, > and from memory - doesn't the heart start to fibrillate at about 25mA. > I've often thought it cruel that - if my memory is correct and it is > indeed 25mA - our RCCBs are set at 30mA :-) > > Even at 30mA though, I know that electricians (in Aus) will run > separate unprotected circuits for refrigerators and airconditioners. My > brother recently refurbished his kitchen and his refrigerator is on a > protected circuit. He said it has tripped twice in say, 6 months. 7mA > is incredibly low. I reckon everybody on this list has had more than > that! Nothing like a little heart starter! :-) > > Regards, > > Sean > > -- > http://www.piclist.com#nomail Going offline? Don't AutoReply us! > email listserv@mitvma.mit.edu with SET PICList DIGEST in the body > > -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body