High voltage visible isolation has been required in Canada since the fifties. Visible isolation is the ability to see the blades of a switch or circuit breaker to determine if the device supplying a high voltage circuit is in the open or closed position.
The Code is a comprehensive document. Sometimes it can seem quite daunting to quickly find the information you need. Part 4 provides a guide to help users find their way through this critical document.
UL Certifies/Lists energy storage systems for use in accordance with new Article 706 in the 2017 NEC. UL Certifies/Lists these systems under the product category Energy Storage Systems and Equipment (FTBW).
Electrical safety needs to be a year-round priority. Don’t dismiss or underestimate your role in preventing electrical accidents. If we all work together maybe someday, we can reach zero incidents.
Section 8 of the CE Code is absolutely critical, as the accurate load calculations constitute the basis for selection of the appropriate conductors’ sizes in services, feeders and branch circuits
In the world of electrical power, copper clad aluminum is the third of only three industrial metals referenced by the NEC as acceptable for use as the core-metal conductor in residential branch circuit conductor applications.
Today we have daily PV inspections, and some are supply-side connected. Article 705.12(A) Point of Connection (Supply-Side) points the reader to 230.82(6) for the allowance to connect to the supply side of the service disconnecting means.
Voltage drop is only mentioned in some sections of the NEC as informational notes, and is required to be calculated in other sections of the Code.
One common way of minimizing possibilities of electrical wiring and equipment becoming an ignition source in hazardous (classified) locations is to locate the equipment and wiring outside of the hazardous (classified) location wherever possible.