---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sat 07/28/18: 16 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:51 AM - Re: Grounding architecture (Eric M. Jones) 2. 08:11 AM - Re: Re: Grounding architecture (Charlie England) 3. 08:50 AM - Re: Re: Grounding architecture (Ken Ryan) 4. 12:09 PM - Can You PLEASE help Me Find a CHINT NP4 Switch (or equivalent) (William Hunter) 5. 12:22 PM - Re: Can You PLEASE help Me Find a CHINT NP4 Switch (or equivalent) (Alec Myers) 6. 12:28 PM - Re: Can You PLEASE help Me Find a CHINT NP4 Switch (or equivalent) (Robert L. Nuckolls, III) 7. 01:07 PM - Re: Can You PLEASE help Me Find a CHINT NP4 Switch (or equivalent) (William Hunter) 8. 01:30 PM - Re: Can You PLEASE help Me Find a CHINT NP4 Switch (or equivalent) (Charlie England) 9. 04:48 PM - Re: Can You PLEASE help Me Find a CHINT NP4 Switch (or equivalen (user9253) 10. 04:52 PM - Re: Can You PLEASE help Me Find a CHINT NP4 Switch (or equivalent) (William Hunter) 11. 05:00 PM - Re: Can You PLEASE help Me Find a CHINT NP4 Switch (or equivalent) (William Hunter) 12. 05:26 PM - 220 VAC Circuit Breaker Question (William Hunter) 13. 07:24 PM - Re: 220 VAC Circuit Breaker Question (user9253) 14. 07:38 PM - Re: 220 VAC Circuit Breaker Question (Charles Plumery) 15. 08:28 PM - Re: Can You PLEASE help Me Find a CHINT NP4 Switch (or equivalent) (Robert L. Nuckolls, III) 16. 08:29 PM - Re: Can You PLEASE help Me Find a CHINT NP4 Switch (or equivalent) (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 07:51:10 AM PST US Subject: AeroElectric-List: Re: Grounding architecture From: "Eric M. Jones" Years ago Bob N. put togther a little collection called the "Economics of Weight Reduction", in which he had a piece I had written. It is still on the Aeroelectric Connection, but I attach it here. Good reading. I too, wonder about using the aluminum skin for a ground conductor...Not that it doesn't work in most cases (it does work), but as the structure ages, and in some special cases, it gives me pause. The rivets could grow weak any you wouldn't even know it. My guess is that steel airframes are best not used as ground due to magnetization. Also to be sure, Aluminum is a far better conductor than copper per weight. I also include my piece on the subject. I sell a lot of Copper Clad Aluminum cable to people who are extremely careful with weight. Drones, NASCAR, EAA aircraft, NASA,Aerovironment, TOP FUEL DRAGSTERS!, Searey, many others. There has never been a problem history with CCA. -------- Eric M. Jones www.PerihelionDesign.com 113 Brentwood Drive Southbridge, MA 01550 (508) 764-2072 emjones(at)charter.net Read this topic online here: http://forums.matronics.com/viewtopic.php?p=481895#481895 Attachments: http://forums.matronics.com//files/copper_cables_607.pdf http://forums.matronics.com//files/economics_of_weight_reduction_139.pdf ________________________________ Message 2 _____________________________________ Time: 08:11:52 AM PST US Subject: Re: AeroElectric-List: Re: Grounding architecture From: Charlie England On 7/28/2018 9:50 AM, Eric M. Jones wrote: > > Years ago Bob N. put togther a little collection called the "Economics of Weight Reduction", in which he had a piece I had written. It is still on the Aeroelectric Connection, but I attach it here. Good reading. > > I too, wonder about using the aluminum skin for a ground conductor...Not that it doesn't work in most cases (it does work), but as the structure ages, and in some special cases, it gives me pause. The rivets could grow weak any you wouldn't even know it. > > My guess is that steel airframes are best not used as ground due to magnetization. > > Also to be sure, Aluminum is a far better conductor than copper per weight. I also include my piece on the subject. > > I sell a lot of Copper Clad Aluminum cable to people who are extremely careful with weight. Drones, NASCAR, EAA aircraft, NASA,Aerovironment, TOP FUEL DRAGSTERS!, Searey, many others. There has never been a problem history with CCA. > > -------- > Eric M. Jones > www.PerihelionDesign.com > 113 Brentwood Drive > Southbridge, MA 01550 > (508) 764-2072 > emjones(at)charter.net > The obvious solution to the unlikely resistance growth issue would be to use a longeron. Obviously won't apply to every a/c design, but the RVs have a continuous longeron from firewall to tail. Tying to a longeron (1/8 thick x 3/4 x 3/4 inches) would give an unbroken path. Charlie --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ________________________________ Message 3 _____________________________________ Time: 08:50:02 AM PST US From: Ken Ryan Subject: Re: AeroElectric-List: Re: Grounding architecture Eric, is the copper clad aluminum cable as stiff as copper of the same gauge? On Sat, Jul 28, 2018 at 6:55 AM Eric M. Jones wrote: > emjones@charter.net> > > Years ago Bob N. put togther a little collection called the "Economics of > Weight Reduction", in which he had a piece I had written. It is still on > the Aeroelectric Connection, but I attach it here. Good reading. > > I too, wonder about using the aluminum skin for a ground conductor...Not > that it doesn't work in most cases (it does work), but as the structure > ages, and in some special cases, it gives me pause. The rivets could grow > weak any you wouldn't even know it. > > My guess is that steel airframes are best not used as ground due to > magnetization. > > Also to be sure, Aluminum is a far better conductor than copper per > weight. I also include my piece on the subject. > > I sell a lot of Copper Clad Aluminum cable to people who are extremely > careful with weight. Drones, NASCAR, EAA aircraft, NASA,Aerovironment, TOP > FUEL DRAGSTERS!, Searey, many others. There has never been a problem > history with CCA. > > -------- > Eric M. Jones > www.PerihelionDesign.com > 113 Brentwood Drive > Southbridge, MA 01550 > (508) 764-2072 > emjones(at)charter.net > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=481895#481895 > > > Attachments: > > http://forums.matronics.com//files/copper_cables_607.pdf > http://forums.matronics.com//files/economics_of_weight_reduction_139.pdf > > ________________________________ Message 4 _____________________________________ Time: 12:09:04 PM PST US From: William Hunter Subject: AeroElectric-List: Can You PLEASE help Me Find a CHINT NP4 Switch (or equivalent) Sorry for the slightly off topic post (however this is for a machine installed inside my airplane hangar). I am looking for a pushbutton switch to replace the broken one on my hydraulic lift. It's a push button momentary contact on single pole single throw switch. The diameter of the hole in the panel is 0.894 inches / 22.72 MM. The switch that broke is labeled CHNT NP4 and it has other numbers on it such as GB140 48.5 and it's a 10 amp switch. It is a switch that you push and hold in the button and then a relay closes to energize the electric motor that moves the hydraulic pump. Again, sorry about the off-topic post however I've spent 30 minutes on the Google with no success but I'm sure there's a guy on this forum that will recognize this switch immediately and know exactly where to find one (or one that will work). Thanks!!! Bill Hunter ________________________________ Message 5 _____________________________________ Time: 12:22:18 PM PST US From: Alec Myers Subject: Re: AeroElectric-List: Can You PLEASE help Me Find a CHINT NP4 Switch (or equivalent) https://www.google.ca/search?q=chint+np4+switch There are about a million options... On Jul 28, 2018, at 20:08, William Hunter wrote : Sorry for the slightly off topic post (however this is for a machine install ed inside my airplane hangar). I am looking for a pushbutton switch to replace the broken one on my hydraul ic lift. It's a push button momentary contact on single pole single throw switch. Th e diameter of the hole in the panel is 0.894 inches / 22.72 MM. The switch that broke is labeled CHNT NP4 and it has other numbers on it suc h as GB140 48.5 and it's a 10 amp switch. It is a switch that you push and hold in the button and then a relay closes t o energize the electric motor that moves the hydraulic pump. Again, sorry about the off-topic post however I've spent 30 minutes on the G oogle with no success but I'm sure there's a guy on this forum that will re cognize this switch immediately and know exactly where to find one (or one t hat will work). Thanks!!! Bill Hunter ________________________________ Message 6 _____________________________________ Time: 12:28:45 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Can You PLEASE help Me Find a CHINT NP4 Switch (or equivalent) At 02:08 PM 7/28/2018, you wrote: >Sorry for the slightly off topic post (however >this is for a machine installed inside my airplane hangar). > >I am looking for a pushbutton switch to replace >the broken one on my hydraulic lift.=C2 > >It's a push button momentary contact on single >pole single throw switch.=C2 The diameter of the >hole in the panel is 0.894 inches / 22.72 MM.=C2 > >The switch that broke is labeled CHNT NP4 and it >has other numbers on it such as GB140 48.5 and it's a 10 amp switch.=C2 =C2 > >It is a switch that you push and hold in the >button and then a relay closes to energize the >electric motor that moves the hydraulic pump. > >Again, sorry about the off-topic post however >I've spent 30 minutes on the Google=C2 with no >success but I'm sure there's a guy on this forum >that will recognize this switch immediately and >know exactly where to find one (or one that will work). > >Thanks!!!=C2 > >Bill Hunter There is nothing electrically special about this switch other than the fact that it's normally open. You probably want to get the door operable ASAP so go to a hardware store and get ANY normally open P.B. Here's one example at Lowes. https://goo.gl/66gez5 Wire it into place temporarily . . . mgiht even let it dangle on the wires wrapped with tape to keep the electrons from tunning onto the floor. Then order one of these: https://goo.gl/pTKXPT It will directly replace the switch that's broken and will be delivered to your door in a few days for free. Bob . . . ________________________________ Message 7 _____________________________________ Time: 01:07:33 PM PST US From: William Hunter Subject: Re: AeroElectric-List: Can You PLEASE help Me Find a CHINT NP4 Switch (or equivalent) That is the one Bob... less than 5 bucks (delivered) is KAZACKLY what I needed. Thanks Again!!!! Bill Hunter On Sat, Jul 28, 2018, 12:32 Robert L. Nuckolls, III < nuckolls.bob@aeroelectric.com> wrote: > At 02:08 PM 7/28/2018, you wrote: > > Sorry for the slightly off topic post (however this is for a machine > installed inside my airplane hangar). > > I am looking for a pushbutton switch to replace the broken one on my > hydraulic lift.=C3=82 > > It's a push button momentary contact on single pole single throw switch. =C3=82 > The diameter of the hole in the panel is 0.894 inches / 22.72 MM.=C3=82 > > The switch that broke is labeled CHNT NP4 and it has other numbers on it > such as GB140 48.5 and it's a 10 amp switch.=C3=82 =C3=82 > > It is a switch that you push and hold in the button and then a relay > closes to energize the electric motor that moves the hydraulic pump. > > Again, sorry about the off-topic post however I've spent 30 minutes on th e > Google=C3=82 with no success but I'm sure there's a guy on this forum th at will > recognize this switch immediately and know exactly where to find one (or > one that will work). > > Thanks!!!=C3=82 > > Bill Hunter > > > There is nothing electrically special about this > switch other than the fact that it's normally open. > > You probably want to get the door operable ASAP > so go to a hardware store and get ANY normally open > P.B. Here's one example at Lowes. > > https://goo.gl/66gez5 > > Wire it into place temporarily . . . mgiht even let it > dangle on the wires wrapped with tape to keep the > electrons from tunning onto the floor. > > Then order one of these: > > > https://goo.gl/pTKXPT > > > It will directly replace the switch that's broken > and will be delivered to your door in a few days > for free. > > Bob . . . > ________________________________ Message 8 _____________________________________ Time: 01:30:32 PM PST US Subject: Re: AeroElectric-List: Can You PLEASE help Me Find a CHINT NP4 Switch (or equivalent) From: Charlie England On 7/28/2018 2:28 PM, Robert L. Nuckolls, III wrote: > At 02:08 PM 7/28/2018, you wrote: >> Sorry for the slightly off topic post (however this is for a machine >> installed inside my airplane hangar). >> >> I am looking for a pushbutton switch to replace the broken one on my >> hydraulic lift. >> >> It's a push button momentary contact on single pole single throw >> switch. The diameter of the hole in the panel is 0.894 inches / >> 22.72 MM. >> >> The switch that broke is labeled CHNT NP4 and it has other numbers on >> it such as GB140 48.5 and it's a 10 amp switch. >> >> It is a switch that you push and hold in the button and then a relay >> closes to energize the electric motor that moves the hydraulic pump. >> >> Again, sorry about the off-topic post however I've spent 30 minutes >> on the Google with no success but I'm sure there's a guy on this >> forum that will recognize this switch immediately and know exactly >> where to find one (or one that will work). >> >> Thanks!!! >> >> Bill Hunter > > > There is nothing electrically special about this > switch other than the fact that it's normally open. > > You probably want to get the door operable ASAP > so go to a hardware store and get ANY normally open > P.B. Here's one example at Lowes. > > https://goo.gl/66gez5 > > Wire it into place temporarily . . . mgiht even let it > dangle on the wires wrapped with tape to keep the > electrons from tunning onto the floor. > > Then order one of these: > > > https://goo.gl/pTKXPT > > > It will directly replace the switch that's broken > and will be delivered to your door in a few days > for free. > > Bob . . . > Hi Bob, You might want to recheck that ebay link. When I click it, I get an emergency stop switch. The industrial E-stop switches I've worked with latch down, opening the safety interlock line and closing a pair of contacts used for monitoring the safety loop. They must be either pulled or rotated back to 'normal' position. The one pictured has circular arrows on the button, which indicates that it latches down and must be rotated to release. The text at the bottom of the listing says that, too. If he's replacing a momentary PB, things could get interesting if he doesn't notice how to release the button. Charlie --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus ________________________________ Message 9 _____________________________________ Time: 04:48:19 PM PST US Subject: AeroElectric-List: Re: Can You PLEASE help Me Find a CHINT NP4 Switch (or equivalen From: "user9253" A search for Chint NP4 gave these: https://www.aliexpress.com/item/CHINT-Button-Switch-Since-Reset-NP4-11BN-Flat-Button-Switch-Reset-Switch-Button-Normally-Open-Often/32828826215.html http://www.usbreaker.com/products/products.php https://www.alliedelec.com/view/search/?category=3|2510419/2737097/2737107&isredirect=1&keyword=switches&n8520=10%20A,15%20A,16%20A,12%20A,13%20A,10.5%20A,20%20A&n8461=Round,Round%2030mm,Round%20Flush,Round%20Recessed&pg=1&mpp &sort=price_retailasc -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=481907#481907 ________________________________ Message 10 ____________________________________ Time: 04:52:18 PM PST US From: William Hunter Subject: Re: AeroElectric-List: Can You PLEASE help Me Find a CHINT NP4 Switch (or equivalent) Thanks Charlie for the heads up! I emailed the seller to confirm what kind of switch it was Thanks, Bill Hunter On Sat, Jul 28, 2018, 13:34 Charlie England wrote: > On 7/28/2018 2:28 PM, Robert L. Nuckolls, III wrote: > > At 02:08 PM 7/28/2018, you wrote: > > Sorry for the slightly off topic post (however this is for a machine > installed inside my airplane hangar). > > I am looking for a pushbutton switch to replace the broken one on my > hydraulic lift.=C3=82 > > It's a push button momentary contact on single pole single throw switch. =C3=82 > The diameter of the hole in the panel is 0.894 inches / 22.72 MM.=C3=82 > > The switch that broke is labeled CHNT NP4 and it has other numbers on it > such as GB140 48.5 and it's a 10 amp switch.=C3=82 =C3=82 > > It is a switch that you push and hold in the button and then a relay > closes to energize the electric motor that moves the hydraulic pump. > > Again, sorry about the off-topic post however I've spent 30 minutes on th e > Google=C3=82 with no success but I'm sure there's a guy on this forum th at will > recognize this switch immediately and know exactly where to find one (or > one that will work). > > Thanks!!!=C3=82 > > Bill Hunter > > > There is nothing electrically special about this > switch other than the fact that it's normally open. > > You probably want to get the door operable ASAP > so go to a hardware store and get ANY normally open > P.B. Here's one example at Lowes. > > https://goo.gl/66gez5 > > Wire it into place temporarily . . . mgiht even let it > dangle on the wires wrapped with tape to keep the > electrons from tunning onto the floor. > > Then order one of these: > > > https://goo.gl/pTKXPT > > > It will directly replace the switch that's broken > and will be delivered to your door in a few days > for free. > > Bob . . . > > Hi Bob, > > You might want to recheck that ebay link. When I click it, I get an > emergency stop switch. The industrial E-stop switches I've worked with > latch down, opening the safety interlock line and closing a pair of > contacts used for monitoring the safety loop. They must be either pulled or > rotated back to 'normal' position. The one pictured has circular arrows o n > the button, which indicates that it latches down and must be rotated to > release. The text at the bottom of the listing says that, too. If he's > replacing a momentary PB, things could get interesting if he doesn't noti ce > how to release the button. > > Charlie > > > Virus-free .. > www.avast.com > > <#m_-6760267267783769634_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> > ________________________________ Message 11 ____________________________________ Time: 05:00:10 PM PST US From: William Hunter Subject: Re: AeroElectric-List: Can You PLEASE help Me Find a CHINT NP4 Switch (or equivalent) The same seller on eBay had the switch I needed so I will swap the emergency stop switch for this one https://m.ebay.com/itm/NEW-TWO-2-Push-Button-Switch-Momentary-Press-Switch- Heavy-Duty/170614528296?hash=item27b96b1928%3Ag%3AOUQAAOxyjzNRF4x~&_pgn =1&rt=nc Thanks again for all your help! Thanks, Bill Hunter On Sat, Jul 28, 2018, 12:32 Robert L. Nuckolls, III < nuckolls.bob@aeroelectric.com> wrote: > At 02:08 PM 7/28/2018, you wrote: > > Sorry for the slightly off topic post (however this is for a machine > installed inside my airplane hangar). > > I am looking for a pushbutton switch to replace the broken one on my > hydraulic lift.=C3=82 > > It's a push button momentary contact on single pole single throw switch. =C3=82 > The diameter of the hole in the panel is 0.894 inches / 22.72 MM.=C3=82 > > The switch that broke is labeled CHNT NP4 and it has other numbers on it > such as GB140 48.5 and it's a 10 amp switch.=C3=82 =C3=82 > > It is a switch that you push and hold in the button and then a relay > closes to energize the electric motor that moves the hydraulic pump. > > Again, sorry about the off-topic post however I've spent 30 minutes on th e > Google=C3=82 with no success but I'm sure there's a guy on this forum th at will > recognize this switch immediately and know exactly where to find one (or > one that will work). > > Thanks!!!=C3=82 > > Bill Hunter > > > There is nothing electrically special about this > switch other than the fact that it's normally open. > > You probably want to get the door operable ASAP > so go to a hardware store and get ANY normally open > P.B. Here's one example at Lowes. > > https://goo.gl/66gez5 > > Wire it into place temporarily . . . mgiht even let it > dangle on the wires wrapped with tape to keep the > electrons from tunning onto the floor. > > Then order one of these: > > > https://goo.gl/pTKXPT > > > It will directly replace the switch that's broken > and will be delivered to your door in a few days > for free. > > Bob . . . > ________________________________ Message 12 ____________________________________ Time: 05:26:41 PM PST US From: William Hunter Subject: AeroElectric-List: 220 VAC Circuit Breaker Question Greetings, If you all would be so kind as to entertain another slightly off topic electrical question. In my hangar I just installed an evaporative cooler and it is powered by a newly purchased 20 amp 220 volt circuit breaker. Due to an internal problem in the toggle switch out at the unit there was a direct short because when I closed the 20 amp circuit breaker(s) about 3 seconds later the entire power to the hanger was shut off because the 60 amp feed circuit breaker out at the house opened. This was kind of surprising because I assume that if there was a short out at the evaporative cooler unit then the new 20 amp circuit breaker that I've installed for that circuit would have opened before the main 60 amp circuit breaker that feeds the entire hanger would open. I removed the toggle switch at the unit and directly wired the 220 volt wires to the unit wires and it's working perfectly (so I have a discussion with Mastercool about getting a replacement toggle switch) but regardless I have concluded that the wires out to the unit are fine and the unit motor is working fine so my only concern at this point is why would the 20 amp circuit breaker not open and why would it stay closed long enough to require the main feed 60 amp circuit breaker to open? I have another 20 amp circuit breaker that I could install in circuit however I figured I would ask the collective what their thoughts were first .. And BTW... the evaporative cooler is taking 100 degree outside Arizona air and making it 80=C2=B0 as it enters the hanger however a 3000 square foot s teel building without insulation in the Arizona Sun is a bit hard to cool. Any suggestions on hanger insulation? Thanks, Bill Hunter On Sat, Jul 28, 2018, 12:32 Robert L. Nuckolls, III < nuckolls.bob@aeroelectric.com> wrote: > At 02:08 PM 7/28/2018, you wrote: > > Sorry for the slightly off topic post (however this is for a machine > installed inside my airplane hangar). > > I am looking for a pushbutton switch to replace the broken one on my > hydraulic lift.=C3=82 > > It's a push button momentary contact on single pole single throw switch. =C3=82 > The diameter of the hole in the panel is 0.894 inches / 22.72 MM.=C3=82 > > The switch that broke is labeled CHNT NP4 and it has other numbers on it > such as GB140 48.5 and it's a 10 amp switch.=C3=82 =C3=82 > > It is a switch that you push and hold in the button and then a relay > closes to energize the electric motor that moves the hydraulic pump. > > Again, sorry about the off-topic post however I've spent 30 minutes on th e > Google=C3=82 with no success but I'm sure there's a guy on this forum th at will > recognize this switch immediately and know exactly where to find one (or > one that will work). > > Thanks!!!=C3=82 > > Bill Hunter > > > There is nothing electrically special about this > switch other than the fact that it's normally open. > > You probably want to get the door operable ASAP > so go to a hardware store and get ANY normally open > P.B. Here's one example at Lowes. > > https://goo.gl/66gez5 > > Wire it into place temporarily . . . mgiht even let it > dangle on the wires wrapped with tape to keep the > electrons from tunning onto the floor. > > Then order one of these: > > > https://goo.gl/pTKXPT > > > It will directly replace the switch that's broken > and will be delivered to your door in a few days > for free. > > Bob . . . > ________________________________ Message 13 ____________________________________ Time: 07:24:35 PM PST US Subject: AeroElectric-List: Re: 220 VAC Circuit Breaker Question From: "user9253" When two circuit breakers (or fuses) are in series, either one or both could trip (or blow) when there is a short circuit. A friend told me that he was working on an electric range outlet without shutting off the power. He stuck his screwdriver where it shouldn't be and shorted out the circuit. The main breaker for the whole apartment building tripped. He had to get the manager to unlock the utility room to reset the main breaker. I do not know if the 40 amp range breaker tripped or not. The above scenario might be one reason why aircraft main bus feeders are not normally fused. I know that the major reason given for not fusing the feeder is that it is not needed. Another reason is that if it is not installed, then it can not blow. -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=481911#481911 ________________________________ Message 14 ____________________________________ Time: 07:38:30 PM PST US From: Charles Plumery Subject: Re: AeroElectric-List: 220 VAC Circuit Breaker Question SSBsaXZlIGluIEZsb3JpZGEgYW5kIGl0IGlzICBhcmd1YWJseSBjb29sZXIgKGluc2VydCBncmlu KSwgSSBpbnN1bGF0ZWQgbXkgc2hvcCB0aGF0IGlzIHByb2JhYmx5IHRoZSBzaXplIG9mIHlvdXIg aGFuZ2VyIHdpdGggaW5zdWxhdGlvbiB0aGF0IGlzIG1ldGFsIGZvaWwgd2l0aCBmb2FtIGluc3Vs YXRpb24gc2FuZHdpY2hlZCBiZXR3ZWVuIGxheWVycy4gQm91Z2h0IGl0IG9ubGluZSBhbmQgYXBw bGllZCBpdCB0byBhbGwgdGhlIHN1cmZhY2VzIGluY2x1ZGluZyB0aGUgbWV0YWwgZG9vci4gU3By YXkgYWRoZXNpdmUgaG9sZHMgaXQgaW4gcGxhY2UuIEhhdmUgaGFkIDEwMCBkZWdyZWUgZGF5cyAh IEFpciBjb25kaXRpb25lciB3aWxsIGZyZWV6ZSB5b3Ugb3V0IG9mIHNob3AuDQpDaHVjaw0KU2Vu dCBmcm9tIG15IGlQYWQNCg0KT24gSnVsIDI4LCAyMDE4LCBhdCA4OjMzIFBNLCBXaWxsaWFtIEh1 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Nuckolls, III" Subject: Re: AeroElectric-List: Can You PLEASE help Me Find a CHINT NP4 Switch (or equivalent) > >You might want to recheck that ebay link. When I click it, I get an >emergency stop switch. The industrial E-stop switches I've worked >with latch down, opening the safety interlock line and closing a >pair of contacts used for monitoring the safety loop. They must be >either pulled or rotated back to 'normal' position. The one pictured >has circular arrows on the button, which indicates that it latches >down and must be rotated to release. The text at the bottom of the >listing says that, too. If he's replacing a momentary PB, things >could get interesting if he doesn't notice how to release the button. > >Charlie Good catch Charlie. I missed that. Perhaps this is a bettery options https://goo.gl/R5rAdN Bob . . . ________________________________ Message 16 ____________________________________ Time: 08:29:29 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Can You PLEASE help Me Find a CHINT NP4 Switch (or equivalent) At 06:59 PM 7/28/2018, you wrote: >The same seller on eBay had the switch I needed so I will swap the >emergency stop switch for this one > >https://m.ebay.com/itm/NEW-TWO-2-Push-Button-Switch-Momentary-Press-Switch-Heavy-Duty/170614528296?hash=item27b96b1928%3Ag%3AOUQAAOxyjzNRF4x~&_pgn=1&rt=nc > >Thanks again for all your help! > >Thanks, > >Bill Hunter Sounds like you guys got it under control . . . that's how this List rolls! Bob . . . ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.