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See our blog post Why did my generator hookup get tagged as defective by the home inspector? for more. There are specific safety requirements for this type of backfeed, and they are intended to eliminate the possiblity of the both the main breaker and the generator backfeed breaker are on the same time. Does the sum of the amperages of the main breaker and the one beside it come to equal or less than the “maximum amps per stab” listed on the manufacturer’s data plate?Įven a electric panel with a regular main breaker may be backfed by a breaker below it that is used for connecting a generator to the panel for use during a power outage.Has the breaker been mechanically secured in place?.
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Siemens generator lockout install#
If you backfeed a panel with a 100-amp service breaker, and the maximum allowed by the manufacturer is 125 amps per stab, then the max you can install on the other side of the stab is 20 amps. This maximum is listed in the data plate. A stab is another name for a bus bar finger. One additional requirement for a backfed main breaker is that the “maximum amps per stab” does not exceed what the manufacturer allows. The red tab at the breaker above is a rated securing device, and it will only be visible with the dead front removed. The breaker is usually, but not always, in the upper left position, and required to be clearly marked as “MAIN BREAKER.” A backfeed main breaker must also be mechanically secured in place. It is essentially providing power “backwards” into the distribution bus. An electric panel is backfed when the main breaker is mounted in the cluster of breakers on the branch bus, instead of being separate, vertical, and above or below the branch-circuit breakers.