Electrical Construction & Maintenance

Stumped by the Code? Rules for sizing transformer secondary conductors?

Q. What are the NEC rules for sizing transformer secondary conductors? A. A set of conductors supplying single or separate loads is permitted to be connected to a transformer secondary without ...
Electrical Construction & Maintenance

Stumped by the Code? Code Requirement for Sizing the Overcurrent Protection of Conductors

All questions and answers are based on the 2017 NEC. Q. What is the Code requirement for sizing the overcurrent protection of conductors? A. Except as permitted by Sec. 240.4(A) through (G), ...
T&D

Two, Three or Four Winding Protection for Transformers of All Sizes

Beckwith Electric's Transformer Protection System M-3311A provides protection, control, monitoring and user interface functions for two, three or four-winding transformers Beckwith Electric's ...
EDN

PPTC devices help protect electric motors, transformers and industrial controllers

Protecting an electronic circuit from damage due to excessive current or heat is the primary function of many circuit protection technologies. In the past, this protection took the form of a fuse or ...