Standby electrical systems include legally and optional standby systems as well as backup systems. NEC 702.4 requires that the standby (or backup) system be sized to support the selected loads whose power is to be maintained by the backup generator. Shown here: a mechanical interlock for a Siemens electrical panel, as sold on
Pertinent Electrical Code Citations for Interlock Kits for Electric Panels Some manufacturers recommend installing usage meters on the electrical generator's panel feed circuit to monitor the total current usage level to keep within the generator's capacity limits. Overloading the backup generator can damage the generator and possibly some appliances.
Additional modifications are needed within the electrical panel, AND there must be an adequate number of free circuit breaker spaces in the existing panel.
instructions for kit K-1010 cited below. Warning : allow appliances to start before engaging the next circuit.
Illustrated here: a typical electrical panel "lockout kit" used in some installations as an alternative to manual transfer switches for connecting a portable backup electrical generator to a residential electrical system. Unlike a transfer switch, an electrical panel interlock kit provides a flat metal plate that is slid into position and then locked in place to assure that a main electrical panel circuit breaker remains in the OFF position so as to permit use of the backup generator. Electrical Panel Interlock Kits for Backup Generators a Low-Tech Alternative to a Transfer Switch for Backup GeneratorsĮlectrical generator "interlock kits" are a simple mechanical device that permits "back-feeding" a home electrical panel from a portable generator during an electrical power outage. We also provide an ARTICLE INDEX for this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need.
This article series discusses the use of emergency generators for electrical power backup at residential properties. Guide to buying, installing & using interlock kits for hooking up backup electrical generators at residential properties. We have no relationship with advertisers, products, or services discussed at this website. InspectAPedia tolerates no conflicts of interest.