My understanding of a cut out switch is that it kills ALL POWER AT THAT SINGLE POINT!!!, The MSA don't have to bother with the niggly issues of how this is achieved, nor the fact that there may or may not be a switch suitable, thats the competitors problem,remember its up to the competitor to prove his truck complies!!! not the scrutaneer to prove it dose!! so if mr scrutaneer pops around ur truck with a volt meter, as ive seen in the past, checking for voltage at alternators, coils, starters,ect and he pops it on a winch solinoid, and it stays live, u dont comply!!!so u don't play!. Like i said it's ur responcability as a competitor to comply, so basicly its ur fault u fitted a winch which pulls too much power for a switch "u fitted" and it melts / fails!! . Remember the MSA are basicly"""insurance"", and if u want to be covered by there insurance, u have to play by there rules!!!