I'm familiar with Hill Billy engineering.. Be careful when taking single phase off 3 phase. Phase to neutral is what you want of course, but if you somehow make a wiring mistake (or they did in the past), you can easily get line to line voltage in a place you don't want it to be. The result can be large amounts of smoke and some fire! Don't ask how I know this... :-/
Dave On 2/5/2016 11:09 PM, Todd Zuercher wrote: > This is the last of our old grandfathered in hill billy engineer machines > that I have to bring into the modern era. Adding an e-stop system is in the > plan as well. I am still amazed that the electrical contractor who installed > the machine when we moved to the new shop in 2008 agreed to put it in this > way. > > My plan was to put in a new panel with a disconnect and feed it with a 40amp > 3-phase breaker from the main panel. Then from the disconnect split it off > into 9 single phase breakers. There already are contactors and such in the > control system, adding the e-stop loop will be very easy. > > ----- Original Message ----- > From: "Dave Cole" <[email protected]> > To: [email protected] > Sent: Friday, February 5, 2016 10:30:50 PM > Subject: Re: [Emc-users] Rewire Question? > > Todd, > > If you have multiple single phase breakers feeding that machine, that is > probably not your only issue when it comes to Osha. > > You need a decent Estop system on the machine also which means at the > least one or more Estop circuits and some contactors to drop out the > power, or more appropriately, bring the machine to a speedy, yet safe > stop. Lock out - tag out is only one of Osha's "hot buttons". > > You need a real control box or you need to adapt an existing control > box. You can add a disconnect switch to an existing panel easy enough, > but you also need downstream breakers from the disconnect as well as > contactors. > > Dave > > > > On 2/5/2016 5:22 PM, Todd Zuercher wrote: >> We have an old machine that through the years has become an ungainly ball of >> wires. Currently with OSHA regs and all lockout tagout is a real pain as it >> is on this machine. >> >> It is a gang router (didn't start out as one), and is connected to 9 >> different single phase 110v breakers. One for each of the six 15amp routers >> plus 3 more for the control, and motion. (that stuff totals at most another >> 15amps.) >> >> Any suggestions for slimming this down so it could run off one set of wires >> with a single disconnect at the machine? >> > ------------------------------------------------------------------------------ > Site24x7 APM Insight: Get Deep Visibility into Application Performance > APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month > Monitor end-to-end web transactions and take corrective actions now > Troubleshoot faster and improve end-user experience. Signup Now! > http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > > ------------------------------------------------------------------------------ > Site24x7 APM Insight: Get Deep Visibility into Application Performance > APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month > Monitor end-to-end web transactions and take corrective actions now > Troubleshoot faster and improve end-user experience. Signup Now! > http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
