Have a customer that has an elevator that trips the CB on occassion. Tenants hear the conduits rattle when it starts intermitantly. I've been doing a TI in the building and have heard it too. (Very distinctive like a short)
I haven't looked at it yet. I have a feeling that it may be a voltage drop related issue, as many feeders in the core of the building are long and undersized. Might look into it tomorrow, check amperage, and voltage under load. Does anyone think that Voltage Drop could raise the in-rush current enough to rattle like that? Like a short?
Might have to put a recorder on it for a while, I'll let you know what I find out.
