#Single line diagram for house wiring generator#
For example, a single-family home would be about as simple as you can get, but if a generator is needed, it is a bit more complicated. Where multi-meter assemblies are used, a 1-line diagram is typically required by the AHJ.ġ-lines can vary from very simple to very complex depending upon the project scope and function. They are typically required for almost every commercial project including multi-family type buildings (apartments, townhomes, and condominiums). On single-family homes and duplexes, they are not typically required unless the calculated dwelling unit load and service rating is over 200 Amperes.ĭepending on the type and scope of a project, the AHJ may require that a 1-line diagram and all associated calculations, panel schedules, and wiring and grounding details be provided to ensure that the project has been properly designed.
A very basic definition of a 1-line diagram is that it is a schematic diagram representing the proposed new or modified electrical service and distribution equipment and all associated wiring and grounding details for the project. For those not so electrically inclined, this “1-line diagram” may be a strange term, but for others in the trade, it is actually a very common term. You may have never heard the term “1-line diagram” before. You may have been advised by the Authority Having Jurisdiction (AHJ) when you attempted to submit your drawings for plan review that your planned project requires that a “1-line Diagram, load and short-circuit calculations” be provided as part of the planned submittal for review and approval. 1-Line Diagram – What is it and why do I need one?
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