Just a small heads up. NVE data has a lot of inconsistency. 24kV is the rated voltage. Some companies report this vs nominal. Nominal for minor lines is either 11 or 22kV.
osm.wiki/WikiProject_Norway/Norwegian_Infrastructure_networks#Voltage_notes

22kV lines are minor and normally poles. Anything below 45kV really is. There are exceptions for tower on minor line though: https://goo.gl/maps/Nf9amTyPcMx
Please read the wiki page for power infrastructure in Norway: osm.wiki/WikiProject_Norway/Norwegian_Infrastructure_networks

Please provide a proper description of what is changed. Not just "changing"...

Hei og velkomen til OSM. Vær forsiktig med å redigere relasjonar når du brukar iD editoren(redigerer rett in nettlesar). Den lagar ofte masse rot. Vil anbefale JOSM til meir avansert redigering. Har fiksa alle feil ;)

Even so, there was a start date on the building that should be a clue. It was set as 2017. Also make sure you use Norwegian Orthophoto as background imagery in Norway. Unless the imagery_used value bugged the changeset is showing Bing.

Please do not change things without local knowledge, or contacting previous mapper. There is a new swimming hall built here now. I have reverted your edit already btw.

Er du på IRC? kom innom på irc.oftc.org #osm-no og helse på oss andre som er aktive ;)

Har du lest på på wikien? osm.wiki/WikiProject_Norway/Norwegian_Infrastructure_networks

This is not a minor line. 33kV and below are minor.

Om du høgre klikker så får du ein meny som lar deg lage rette kantar på bygningen ;)

I see. I could not see the line many places on aerials and there was no source mentioned anywhere. I guess it is ok to tag it as 765kV if the towers are marked with that. I'm used to having official numbers here with actual operating voltage. So I put design voltage in a note for future reference.

What source was used for this "765kV" line? If it is operating at 400kV then tag it as such, not the design voltage. Leave that in the note.

I applied a bit of a bigger fix now to make them multipolys. Kind of strange that JOSM didn't warn, the wood relation was clearly not closed.

Please learn how to do relations and multipolygons. This edit broke a big wood relation. Landuse in Norway is not built with closed polygons connected.

Why did you change road classes around Vinstra? Do you know how the road classification system work for Norway?

Kan vere nedlagt eller bytta til eit anna selskap

Never revert changes before talking to the person who made the change. I expect you to fix this revert within 24 hours.

Do not make changes when you have no knowledge. Please read my changeset before. The changes were done cause the E134 is extended to E6 from 11. November 2018.

Description should be: Updated Lysebotn and Tjodan hydro plants. Update Lysebotn substation and some 132kV lines

So you're saying it was on the Norwegian orthophoto and it still flagged the changeset imagery_used with Bing?