OLD "Square D" 3PH fuseboard- any experience of these- are they safe for use?
I've seen a couple of these but was asked to work on one yesterday. When trying to remove the live&N from an RCBO I was horrified that the breaker just "popped" out of its mounting on the buzz-bar- there's no way to screw it tight, it just pushed in. Ok so it went back but that doesn't seem safe to me: the MCBs are better supported and are less likely to come out but that doesn't mean the connection is any better. Combined with the fact that this board is at floor level inside a full depth kitchen base cabinet, making it almost impossible to work on this without pushing further breakers out, I'm of a mind to recommend this is relocated and replaced, at considerable cost to the customer. Are these boards even safe? They're obsolete as far as I can tell. I'm really worried about the breaker fitment, maybe the spring loaded fitment is safe, but not if every time you work on it stuff pops out and has to be pushed back. I reckon its 15 years or so old, I cant be certain its gone back safely. They look like a spring clip you'd hold a screwdriver or small tool onto a board in a workshop, which last about 5 minutes. When some advocate calibrated torque screwdrivers for buzz-bar connections, and we all know how important it is that these connections are tight, how can I pass this as safe for use?
