Re: OFF is zero

was with regard to the ETYMOLOGY of the IEC 60417 symbols 5007 (a vertical line) and 5008 (a circle). The IEC 60417 symbols 5007 and 5008 are SYMBOLS. They are NEITHER numbers NOR letters. The ETYMOLOGY I quoted shows that these symbols were originally the numbers zero for OFF and any number one

Re: OFF is zero

Hi Serge: O = Out of Circuit I = In Circuit Note: while many people believe the symbols are O 1, they are in fact O I IEC 60417 Symbols 5007 and 5008 are neither: the numbers 1 and 0, nor the letters I and O. They are the symbols depicted in the 60417

Re: OFF is zero

I think I missed the beginning of this thread, so please forgive me if I rehash old ground. The 'vertical line' and 'circle' you refer to, are actually a 1 (One) and 0 (Zero); as in digital logic on/off respectively. Best regards, Stephen At 11:53 AM 10/21/2002, Rich Nute wrote:

RE: OFF is zero

: Monday, October 21, 2002 10:53 PM To: Barker Neil Cc: Product Safety Technical Committee Subject: Re: OFF is zero Hi Neil: The origin may be true, but IEC60417 is quite clear. ON is a vertical line (symbol 5007) and OFF is a circle (symbol 5008). Agreed. And thank you

Re: OFF is zero

Hi Neil: The origin may be true, but IEC60417 is quite clear. ON is a vertical line (symbol 5007) and OFF is a circle (symbol 5008). Agreed. And thank you for the clarification. Best regards, Rich --- This message is from the IEEE EMC

OFF is zero

A week or so ago, I asked about the origin of the 0 and 1 symbols for off and on. I mentioned that it was my recollection that the the symbols came from early safety standards where the off and on functions were by means of a rotary switch where the 0/zero position was off. I found some