Jerry Simon Posted May 17, 2017 Report Share Posted May 17, 2017 What is the rationale for not allowing lower branch circuit wiring to run back through the main service entrance cable raceway (what are the risks)? Link to comment Share on other sites More sharing options...
Chad Fabry Posted May 17, 2017 Report Share Posted May 17, 2017 Induced current. Link to comment Share on other sites More sharing options...
Marc Posted May 18, 2017 Report Share Posted May 18, 2017 (edited) The main panel feeders are protected only by the downstream device. The super-lag utility fuse situated upstream is too big to protect it. If you consider a branch circuit conductor in the same conduit as those feeders, a failure in the respective branch circuit breaker could cascade into a feeder failure with violent and catastrophic results. Edited May 18, 2017 by Marc Link to comment Share on other sites More sharing options...
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