Originally Posted By: Charles Palmieri This post was automatically imported from our archived forum.
It appears that the lug does not hold a conductor. This panel could have been originally set as a main lug feed or as it is with a main breaker. I’m not sure how it was listed!! But in any case the missing screw is only a problem if it’s sitting somewhere in the panel waiting to fall across the feeder bus, ouch!
Originally Posted By: jedwards This post was automatically imported from our archived forum.
Somebody musta declared this “Zinsco Appreciation Month” or some such. Got another one today myself. Why do Zinscos always seem to have been rigged by a chimp with a screwdriver and lineman’s pliers?
Originally Posted By: Charles Palmieri This post was automatically imported from our archived forum.
Mike
I’m not sure this panel has the 100 A breaker back fed. Those lugs have been provided in the past for taps or extending to other load centers.
408 16 (F) of the NEC states for Back-Fed Devices. Plug-in-type overcurrent protection devices or plug-in type-main lug assemblies that are backfed and used to terminate field-installed ungrounded supply conductors shall be secured in place by an additional fastener that requires other than a pull to release the device from the mounting means on the panel.
This article allows back fed devices (plug in type breakers for example) but the device must be secured to prevent loosening and popping out. Manufactures will provide a clip and screw in a kit and the load center will have a dedicated space to install these devices where the clip can be secured to hold the breaker in.
Oh! are those cables entering the bottom right, secured with connectors???