Backstab holes create a pretty poor connection with very little surface area and light pressure compared to the screw terminals. It may make a half-decent connection at first, but over time as the contacts oxidize/corrode they become a high resistance point and heat up a lot. Terrible design.
They always fail spectacularly. I’ve seen countless melted receptacles, usually due to a backstab connection and a high power load plugged in downstream. Since I’m in Canada, space heaters are one of the worst culprits.
Refrigeration tech here, why is using the back stab holes a bad thing?
Backstab holes create a pretty poor connection with very little surface area and light pressure compared to the screw terminals. It may make a half-decent connection at first, but over time as the contacts oxidize/corrode they become a high resistance point and heat up a lot. Terrible design.
They always fail spectacularly. I’ve seen countless melted receptacles, usually due to a backstab connection and a high power load plugged in downstream. Since I’m in Canada, space heaters are one of the worst culprits.