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Old February 9th, 2018, 10:47 AM   #1
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United Kingdom

Rob... is offline
Join Date: Jul 2016
Location: Manchester
Posts: 148
OT: Siemens L+ & M

Ok, as we all know a lot of connections on siemens equipment have the letters L+, M and PE or ground symbol.

We all know what they mean, an what should be connected but I was asked today a simple question.

What does the 'M' stand for, is it an abbreviated German word? I know it's the 0V reference.

My German is fairly good, but I'm struggling to think of any word that begins with M that would describe it's function. As I'm a curious guy, it's just something I'd like to know, if anyone on here knows?
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