Path: csiph.com!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail From: Joerg Newsgroups: sci.electronics.design Subject: Re: Very slightly OT: Circuit breaker compatibility Date: Tue, 14 Mar 2017 07:59:32 -0700 Lines: 47 Message-ID: References: <0be36c68-424c-419c-bfca-fec9bee50534@googlegroups.com> <87d236bd-4d0a-4ecd-8231-8a460012e5ab@googlegroups.com> <17b3f3eb-2f6c-474a-8613-5373bff79399@googlegroups.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Trace: individual.net bemj0l+jQ9ttvyw4NLkylA50vbeVbL/kC8nI9tvLKL5nKoTm4Y Cancel-Lock: sha1:QNaDEv/0/Q97norbQpJ1RnfF/nk= User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.6) Gecko/20070728 Thunderbird/2.0.0.6 Mnenhy/0.7.6.666 In-Reply-To: <17b3f3eb-2f6c-474a-8613-5373bff79399@googlegroups.com> Xref: csiph.com sci.electronics.design:451774 On 2017-03-14 06:40, tabbypurr@gmail.com wrote: > On Monday, 13 March 2017 22:49:13 UTC, Joerg wrote: >> On 2017-03-12 11:38, tabbypurr wrote: >>> On Sunday, 12 March 2017 14:14:07 UTC, Joerg wrote: >>> >>>>>> I found a whole slew of those. However, you also see >>>>>> breakers like that at yard sales and typically their >>>>>> contacting screws are rusted shut. The material quality >>>>>> wasn't all that great. That also was the case for all the >>>>>> breakers I tore out of this panel. I had to snip the wires >>>>>> as there was no way to loosen those screws one more time. >>>>>> >>>>> >>>>> http://www.ebay.com/itm/190797335710 >>>>> >>>> >>>> Provided they did not store it in the basement, attic or garage >>>> for 30 years. In the verious listings nearly none of the photos >>>> shows the screw terminal. That's the part that rusts out and >>>> makes a breaker de-facto unusable. That is what ruined all the >>>> ones in the panel I was dealing with (non-heated room), even >>>> one that was never used. >>> >>> sand/file/grind some rust off & solder to it. >>> >> >> And then Monsieur L'Inspecteur waltzes in. One guy around here >> soldered connections in his house wiring which IMHO made it much >> safer than the usual fare. However, the inspector blew a gasket and >> made him rip it all out. > > Soldered connections aren't necessarily safer, it depends. It's easy > to inadequately mechanically support a soldered joint making it > fragile & thus unsafe. It also can melt, raising resistance under > adverse conditions. If you're an EE you oughta be able to do it > properly though. > Yes, and if properly soldered and kept from moving they sure last longer than those dreaded wire nuts. I can't even count anymore how many times I opened a box and one of more of the wire nuts almost fell off. I've also see my share of wire nuts where the plastic cover had clearly melted. -- Regards, Joerg http://www.analogconsultants.com/