Kitchen islands have been getting bigger and bigger for years. How big does the island need to be to require more than one receptacle outlet to be installed? The 2020 NEC requirements answer that question.
Many industrial processes use electrically powered heat trace systems. Installers with little experience in this application think that heat trace cable is used to keep water pipes from freezing, but this is just the beginning.
Some installers of electrical equipment have a bit of difficulty in differentiating ground fault circuit interrupters and ground-fault protection. And what is the difference between a typical overcurrent protective device and a ground-fault circuit interrupter?
Wiring methods for Class I, Division 2 locations are addressed in Section 501.10(B) of the NEC. Here, in addition to those wiring methods that are permitted for Class I, Division 1 installations in Section 501.10(A), the NEC covers other wiring methods that are permitted for Class I, Division 2.
The benefit of group motor installations is that only one branch-circuit overcurrent protective device (fuse or listed inverse-time circuit breaker) is required to provide short-circuit protection for all motor controllers or overload protection devices in the group.