I agree with Mr. Woodgate. The issue is whether there is a risk of a voltage between the conductive enclosure of a device and exposed conductive materials in the environment. The “ground” system only needs to ensure that there won’t be a voltage difference between a device’s exposed parts and anything the user can touch in the environment. If the metal structure of the ship is used as the “ground” and the ground pin of outlets is connected to the metal structure of the ship, and the ship’s generator uses the metal structure as a grounding reference, the system should function similarly to the grounding system of a properly wired structure on solid land.
Ted Eckert Microsoft Corporation The opinions experessed are my own and do not necessarily reflect those of my employer. From: John Woodgate <[email protected]> Sent: Monday, July 8, 2019 11:39 AM To: [email protected] Subject: Re: [PSES] Ground on ship 'Ground' only means 'the places which we agree have zero volts on them', nothing more. So wherever that is, on a ship or an aircraft (or inside an appliance with a 2-core power cable), that is 'ground'. Best wishes John Woodgate OOO-Own Opinions Only J M Woodgate and Associates www.woodjohn.uk<https://nam06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.woodjohn.uk&data=02%7C01%7Cted.eckert%40microsoft.com%7Cfd6c2919eaa44b74be3a08d703d64243%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C636982091089615454&sdata=ZULc%2BjK2cbzgfl3w9igbG2dWt5vkg6qJPpuMhOWr6mQ%3D&reserved=0> Rayleigh, Essex UK On 2019-07-08 19:19, [email protected]<mailto:[email protected]> wrote: Hello group, Is there a real ground in a ship? i.e if a Class I product is used on the board of a ship, does the ground pin actually doing anything? The ship is floating in the ocean and I cannot understand if there is a real ground there or not? Can you guys educate me please? Thank you Peter - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. 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