Keith Posted August 27, 2006 Share Posted August 27, 2006 can anyone please explain the difference between type A and type AC " interrupteur differentials" I have been told that AC are for specialist circuits eg washing machine, oven ,dishwasher etc and type A are for general power and light circuits whereas the Leroy Merlin free guidance booklet shows the exact opposite ! Link to comment Share on other sites More sharing options...
Nick Trollope Posted August 28, 2006 Share Posted August 28, 2006 Type A are for "gros appareils" - washing machines & the like.The difference is about what they detect - essentially, A type detect failures where the failure is large amount of continuous current & AC detects differential failures... Link to comment Share on other sites More sharing options...
fulcrum Posted August 28, 2006 Share Posted August 28, 2006 [quote user="nicktrollope"]Type A are for "gros appareils" - washing machines & the like.The difference is about what they detect - essentially, A type detect failures where the failure is large amount of continuous current & AC detects differential failures...[/quote]NickBoth the Type A and AC detect differential failures. Being as an electric cooker/hob and or washing machine have their own two pole disjuncteurs, after the Type A, for detecting over current. Why is a type A necessary? The description on page 190 of the L'installation electrique mentions residual currants. Link to comment Share on other sites More sharing options...
Dave&Olive Posted August 28, 2006 Share Posted August 28, 2006 hi ok they way my limited french read the book was type AC for general use ( for ac current) and type A for anything that might have a dc and ac current like the control circuits on a washing machine and type hi for computers and freezers, !!!!!! hope it`s right thats how iv`e done mine !!!!!!!come on Nick put our minds to rest dave Link to comment Share on other sites More sharing options...
Nick Trollope Posted August 29, 2006 Share Posted August 29, 2006 [quote user="fulcrum"][quote user="nicktrollope"]Type A are for "gros appareils" - washing machines & the like.The difference is about what they detect - essentially, A type detect failures where the failure is large amount of continuous current & AC detects differential failures...[/quote]NickBoth the Type A and AC detect differential failures. Being as an electric cooker/hob and or washing machine have their own two pole disjuncteurs, after the Type A, for detecting over current. Why is a type A necessary? The description on page 190 of the L'installation electrique mentions residual currants.[/quote]Indeed they do - I was trying to simplfy it.I suppose, type A are not really necessary, as you could use AC's for everything. But if one sticks to the instructions in the books, you won't go far wrong!Dave - continuous current is not DC. Some devices (w/machines, & computers for example) tend to allow small amounts of current to flow to earth continuously (leakage current) - this is usually down to the CE anti-emissions regs. It is AC none the less.Don't ask an Electrician! Link to comment Share on other sites More sharing options...
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