Re: DC power supply grounding

BuffaloJohn All Messages By This Member #118030 The fuse must be on the hot leg. You can fuse both L and N, but if the fuse blows in that diagram and the emergency switch is engaged (either from failure on the switch or re-engagement) then line voltage flows to the circuit. While the N return is opened by the fuse, shorting from L to the chassis will let current flow. Always have fuses or breakers on the L side. toggle quoted message Show quoted text On Sat, Dec 30, 2023 at 8:46?AM Mark Kimball <markkimball51@...> wrote: RE:? fuse on the neutral side.? There might be a couple of reasons why it's on that leg.? The first is that the fuse is user-replaceable so it's less dangerous in terms of inadvertently coming in contact with AC when replacing a blown fuse.? The second is that the controller may be designed so that the emergency switch opens up when the controller loses power (as in, when the fuse opens up). A third is that the schematic you've got is incorrect.? It wouldn't be the first time. These are just guesses on my part.? Mark -- Buffalo John

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