Old 1950's - 60's 120/240 High Leg No Main, Proper N-G Bond location???

Fused discos have no neutral or ground bar, neutral just passes through each disco, and everything is done in rigid
I just checked the fused discos and they are labeled as "suitable for service equipment"
Those two statements are not compatible ... part of the listing requirements of equipment that is listed for use as service equipment is that the equipment have a neutral bar and a factory supplied main bonding jumper.
 
Those two statements are not compatible ... part of the listing requirements of equipment that is listed for use as service equipment is that the equipment have a neutral bar and a factory supplied main bonding jumper.
Well I looked in all of them and only one has it. The other Square D has the holes where it would mount, but it looks like it was never installed. As far as the FPE discos go, there are none in there but the the label on the door says "Suitable for service entrance equipment". Maybe the original installer never put them in, or removed them for some reason.

Screenshot 2025-08-03 212530.pngScreenshot 2025-08-03 212715.png
 
If you are making changes, I would not accept them as service disconnects, without replacing the neutral bars
Does the neutral bar have to be the original to keep from violating the listing? Not sure if I want to change anything except make sure the bond in the trough is done right. Everything is connected by the rigid conduit, not to mention they are all bolted to the same steel supports on the wall.
 
Yeah, "violating" might be the wrong word. I don't see why I can't find a neutral bar that would work. But with everything bonded to everything not only by the ridgid but also by the steel angle it's all bolted to, I feel like I'm doing work for no gain
 
Yeah, "violating" might be the wrong word. I don't see why I can't find a neutral bar that would work. But with everything bonded to everything not only by the ridgid but also by the steel angle it's all bolted to, I feel like I'm doing work for no gain
Yeah I agree. There is no technical reason that the neutral needs to be bonded to the disconnect in the disconnect. If all the fittings and lock nuts were tight and didn't have any corrosion I would just leave it.
 
Top