The primary neutral connection needs to be tight and corrosion-free; a jeopardized neutral can trigger voltage imbalances

https://emiliobwez151.capitaljays.com/posts/the-anatomy-of-an-electrical-panel-a-visual-walkthrough

The primary neutral connection needs to be tight and corrosion-free; a compromised neutral can trigger voltage imbalances, harmful home appliances and delicate electronics.