I'm not an expert on this, but I've been told you shouldn't mix AC switches/breakers for DC use. Different cutoff mechanics inside the switch lead to arching and finally switch failure when you least expect it. AC switches terminate the circuit easier when used in an AC environment because of the oscillating nature of the current. DC current causes a longer hotter spark that can cause the switch to fail.
Les Criscillo Tampa, FL [email protected] http://groups.msn.com/LesLifeandfriends/homepage ----- Original Message ----- From: Martindale Family To: KRnet Sent: Friday, December 19, 2003 02:57 Subject: KR>Switch ratings Folks For the elecrically inclined, a very basic qustion? How does one convert an AC switch rating to the DC equilivent. For example 125V AC 3-amp relates to 12V DC at what amps?? I know DC ratings are less for a given voltage due to the one way current gradually removing metal from one contact whereas an AC current gives even wear but..... I'm getting a 1/2 volt drop across my ignition switches after about 20 hours that was not present initially and I'm wondering if the above rating is insufficient. Regards The Martindale Family 29 Jane Circuit TOORMINA NSW 2452 AUSTRALIA phone: 61 2 66584767 email: [email protected]_______________________________________________ see KRnet list details at http://www.krnet.org/instructions.html
