Talk:Q2051195

Unit symbol

@Rehman: Following the SI (page 5 in SI Brochure (9th edition): Concise summary (Q68977959)), there is a space between constituents of a unit, as in N m (newton metre). It seems that W h typically leaves out the space. I'd suggest that we keep the SI-compliant symbol (potentially alongside the commonly-used symbol). Toni 001 (talk) 09:49, 12 October 2020 (UTC)

Thanks for the note. Considering the widespread use of the non-space symbol (both on Wikipedia and Wikidata), I'm leaning towards not changing this (and reversing the all other changes you have made for related units as well). Pinging WikiProject Energy to see what others think: ArthurPSmith, Katjos, Te750iv, Jklamo, Dhx1, Scott Davis, Andber08, Gnoeee. Rehman 09:55, 12 October 2020 (UTC)

Another similar case to consider is ampere hour (Q212120). Though in that case, the English Wikipedia article makes clear that Ah is an unofficial symbol. Toni 001 (talk) 09:58, 12 October 2020 (UTC)

@Toni 001, Rehman: Given that the hour (h) is not an SI unit, I don't think SI conventions apply here. In general I would defer to the most common usage found (in the given language) for the unit symbol, at least as a preferred value; however alternatives for matching purposes might also be listed. ArthurPSmith (talk) 14:11, 12 October 2020 (UTC)

hour (Q25235) is in the class non-SI unit mentioned in and accepted with the SI (Q3268848) (also know as SI-accepted unit). So the rules could apply here, too. Toni 001 (talk) 17:21, 12 October 2020 (UTC)

Here is another source which supports the space between W and h: Recommendation 20 of the UN unit code uses symbol kW·h. Here is a French version of the same recommendation. Toni 001 (talk) 10:19, 13 October 2020 (UTC)

Dot is not space... --Infovarius (talk) 21:02, 14 October 2020 (UTC)

Sure, but what are you suggesting? Dot and space can be used interchangeably. Keeping just one of the possible alternatives (center dot vs. space) should be enough. Toni 001 (talk) 21:11, 14 October 2020 (UTC)