Thread: 3HP 1P motor tripping RCD tripping

Good recovery,
bit hard to tell from photo, but a word of caution as to a possible reduction in cross section of the wire. If it has worn through it may creat a hot spot with load. This may lead to the wire burning through. Hind sight is great and it's easy to say things after the event, but I would have applied some solder to the injury and then insulated the repair. Just trying to support not criticise.

Should have added this to previous reply,
This shows the advantage of having a RCD on the circuit, without it the damage could have been a lot worse, probably a replacement or rewind of the motor.
The RCD does not only protect us but as seen it helps reduce damage to our equipment

Well spotted, It sure does look burned in the photo but under a 10X loupe it looked like a lump and it felt like a lump when prodding it with a scalpel tip. The more I look at the photo the more it looks like a burn and now you have me worried. It won't be too be too difficult to cut the silicone off with a scalpel and fix it.

I opened it all back up again and burnt away the resin and now can clearly see it is a small depression but it's small in comparison to the diameter of the wire.
I estimate that it's at most 5% reduction in the cross section area of the wire at that point so it probably would have been OK as it was.




But just to play it safe, I put a dob of solder on it.

T for team, well done for taking the time to check the damage. Looking at the most recent pics your probably right, minimal copper loss.
Well done