If the breaker is feed from the load side ,will it trip at the rated trip current?
Scenario : The generator became motorized.
(D) 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.
It makes a difference with shunt trips too.If a breaker is marked line and load you must follow those markings. Without those markings they will operate fine in either direction.
Typically line and load is found on beakers that have electronic components in them such as AFCIs, GFCIs and GFP type breakers.
Some or all shunt trips? Most I have been involved with probably doesn't matter as they are still a standard breaker with the shunt coil added and it has it's own separate terminals.It makes a difference with shunt trips too.
If a breaker is marked line and load you must follow those markings. Without those markings they will operate fine in either direction.
Typically line and load is found on beakers that have electronic components in them such as AFCIs, GFCIs and GFP type breakers.
As long as the shunt coil is isolated and you connect it on the load side it should be fine.Some or all shunt trips? Most I have been involved with probably doesn't matter as they are still a standard breaker with the shunt coil added and it has it's own separate terminals.
That has been my experience - I suppose there could be something different out there.Shunt trips are completely isolated from the electrical power of the CB. The shunt trip mechanically trips the CB when it is activated. AFAIK, the CB does not even need power applied for the shunt trip to work.
As best I can tell the primary difference between at least larger MCCB that can or cannot be backfed is whether they have changeable trip elements. If you can change the trip unit, it is not reverse feedable. No idea why.