> Hi Larry > > Yeh that's what I thought but something still niggles. > > 125VAC at 3 amps should be roughly equilvalent to 14VDC at 27 amps. I ought > be OK but somehow the latter seems excessive? > > 125VAC at 3 amps relates to 125VDC at only 0.375 amps by Jim's rule of > thumb, that is, voltage being equal, DC current rating is about 1/8 of AC > but > it can vary depending on switch quality according to Aeroelectrics. > > Aeroelectrics also says "in a nutshell, 125VAC ratings equate favourably and > conservatively to 14VDC ratings -as long as the switch has a healthy snap > action"....the latter to minimise arcing time. > > ...and so I am relieved in some ways but still curious about what is causing > my 1/2 volt drop across the switches... maybe they are arcing internally and > building up a resistance or maybe they're just dirty...either way as Jim > suggests, they're headed for the bin. > > > See Ya > > The Martindale Family > 29 Jane Circuit > TOORMINA NSW 2452 > AUSTRALIA > > phone: 61 2 66584767 > email: johnj...@chc.net.au
..............Watts are volts X amps. You are talking 375 watts (AC) vs 4+ watts (DC). > > You went the wrong way way with the 1/8...... >
