I was sure the neutral bar in that old Cutler-Hammer panel was fine, but a flickering light told a different story

For years, I'd see those older panels and think the neutral bar was just a solid piece of metal, so it couldn't really fail. Then last month in a 1970s house in Springfield, a dining room light kept dimming and I finally pulled the meter. The bar had a hairline crack you could barely see, and it was heating up enough to discolor the insulation on three wires. It matters because that's a slow burn waiting to happen, not just a nuisance flicker. Has anyone else caught a failing neutral bar that looked perfectly good from the front?

3 comments

3 Comments

kai6026h ago

How often do we just trust that old equipment is fine because it's lasted this long? I found a cracked bar in a FPE panel last year that looked completely normal until I took a closer look at the side. It had started to arc and left a tiny burn mark on the back. That's the scary part, it's hidden. I get what @rowanbennett is saying about things settling, but heat cycles over decades can still cause new stress points. You really have to look for those hairline faults.

murray.cole11d ago

A hairline crack you could barely see? That's terrifying. It's crazy how something that looks totally solid can be hiding a problem like that. Makes you wonder how many old houses are just sitting on a slow burn like you said. I'd never even considered the bar itself could crack.

rowanbennett11d ago

My uncle's place had a crack like that for twenty years with no issue. Most of these old problems settled decades ago and just stay put. People get worried over every little line in the plaster now.