Received: by 10.224.180.141 with SMTP id bu13mr6024428qab.2.1353217113221; Sat, 17 Nov 2012 21:38:33 -0800 (PST) X-BeenThere: midsouth-makers@googlegroups.com Received: by 10.49.71.6 with SMTP id q6ls1390690qeu.31.gmail; Sat, 17 Nov 2012 21:38:32 -0800 (PST) Received: by 10.49.86.106 with SMTP id o10mr1788831qez.14.1353217112388; Sat, 17 Nov 2012 21:38:32 -0800 (PST) Date: Sat, 17 Nov 2012 21:38:31 -0800 (PST) From: Kitten To: midsouth-makers@googlegroups.com Message-Id: <2dd83d1c-b5c7-4777-8f5c-9c6dc132dd26@googlegroups.com> In-Reply-To: References: <4fe8fe4b-4d9e-442b-89bb-611c1db888b0@googlegroups.com> Subject: Re: [MidsouthMakers] Re: Safety Last MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_176_3369623.1353217111682" ------=_Part_176_3369623.1353217111682 Content-Type: multipart/alternative; boundary="----=_Part_177_26931730.1353217111682" ------=_Part_177_26931730.1353217111682 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit The 16 or 14 AWG wire would only run from the coil on the contactor through the NO aux contacts as well as all of the NC E-Stop contacts in series. 10AWG would come into the top of the contactor main contacts and then go out the bottom o the main contacts to all protected outlets. That way if someone hits any of the E-Stops the contactor opens as well as the aux contacts and prevents the contactor from re-energizing once the fault is cleared until you hit the push to reset button which is wired as NO to power. Pressing reset energizes the coil and closes the main contacts and aux contacts allowing it to remain energized when the reset button is released. I apologize for any confusion caused by my poor description. On Saturday, November 17, 2012 10:13:33 PM UTC-6, Ed wrote: > > Hey.. just an aside on the wiring.. if it's a 30-Amp circuit, I think > you'll want to use 10ga copper wiring. 14ga is normally for 15-Amp > circuits.. Granted, I only really know house wiring so if I'm wrong, please > speak up. > > > On Sat, Nov 17, 2012 at 4:15 PM, Kitten >wrote: > >> I should have noted earlier that the E-Stop system proposed is a line >> voltage method, we may want to consider going to a 24V system but that'd >> require a 30A 2 pole minimum 24v coil contactor with aux contacts and an >> additional 30 dollar 24 volt din rail power supply but would be marginally >> safer if someone cut through a cord somehow. In the proposed system there >> would be a 1/4 amp fuse and fuse holder in line with the hots as well as a >> ground wire in the actual wiring. The purchased E-Stops are fine for either >> method and are in plastic enclosures so a shock risk would only be present >> on damaged wiring. >> >> I personally don't feel at this time the added expense is warranted but I >> figured that it should be up for a group opinion/vote. >> > > > > -- > Ed Stafford > ------=_Part_177_26931730.1353217111682 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable The 16 or 14 AWG wire would only run from the coil on the contactor through= the NO aux contacts as well as all of the NC E-Stop contacts in series. 10= AWG would come into the top of the contactor main contacts and then go out = the bottom o the main contacts to all protected outlets.  That way if = someone hits any of the E-Stops the contactor opens as well as the aux cont= acts and prevents the contactor from re-energizing once the fault is cleare= d until you hit the push to reset button which is wired as NO to power. &nb= sp;Pressing reset energizes the coil and closes the main contacts and aux c= ontacts allowing it to remain energized when the reset button is released.<= div>
I apologize for any confusion caused by my poor descript= ion.

On Saturday, November 17, 2012 10:13:33 PM UTC-6, Ed wro= te:
Hey.. just an aside on the = wiring.. if it's a 30-Amp circuit, I think you'll want to use 10ga copper w= iring.  14ga is normally for 15-Amp circuits.. Granted, I only really = know house wiring so if I'm wrong, please speak up.


On Sat, Nov 17, 2012 at 4:15 PM, Ki= tten <ske...@gmail.com> wrote:
=
I should have noted earlier that the E-Stop system proposed is a line volta= ge method, we may want to consider going to a 24V system but that'd require= a 30A 2 pole minimum 24v coil contactor with aux contacts and an additiona= l 30 dollar 24 volt din rail power supply but would be marginally safer if = someone cut through a cord somehow. In the proposed system there would be a= 1/4 amp fuse and fuse holder in line with the hots as well as a ground wir= e in the actual wiring. The purchased E-Stops are fine for either method an= d are in plastic enclosures so a shock risk would only be present on damage= d wiring. 

I personally don't feel at this time the added expense is wa= rranted but I figured that it should be up for a group opinion/vote.
<= /blockquote>



--
Ed Stafford
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