# ANSI/IEEE Single-phase AC source form Canonical URL: https://eloragrid.ai/symbols/ansi-single-phase-ac-source Publisher: Elora Grid Updated: 2026-10-28 Lookup label: AC 1PH Drawing use: SLD, Schematic Reference families: IEEE / ANSI, Manufacturer ## Symbol convention Convention: IEEE / ANSI Form: Power Source 1 Phase Autodesk IEEE Symbol Preview: Miscellaneous, block HPW1_1PH. Matching functional counterpart linked separately. Independently drawn educational geometry; not a certified IEEE glyph or database identifier. Related representation: [Single-phase AC source](https://eloragrid.ai/symbols/single-phase-ac-source) IEEE-library form of single-phase ac source: a single-phase AC source identifies a documented source boundary in a schematic or SLD. ## In plain English ### What does ANSI/IEEE Single-phase AC source form mean? This reference locates single-phase ac source in Autodesk's IEEE-oriented miscellaneous family. A single-phase AC source identifies a documented source boundary in a schematic or single-line diagram. The source label and supply data explain what provides the circuit's voltage and frequency. The public library uses HPW1_1PH for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number. ### A simple example Use the surrounding circuit labels and the project legend to identify the intended operating condition and connection. Carry the same device reference into the schedule or equipment document so the symbol can be reconciled with its real terminals, function and operating limits. ### What the drawings help you do Determine whether the source is a utility connection, transformer winding or auxiliary source. A source-boundary symbol is not a product-specific generator or transformer diagram. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted. ### This particular reference IEEE-library form of single-phase ac source: a single-phase AC source identifies a documented source boundary in a schematic or single-line diagram. A source-boundary symbol is not a product-specific generator or transformer diagram. ### Terms - AC: Alternating current: electricity whose direction changes periodically. - Winding: A coil of conductor inside an electrical machine or transformer. - Phase: One of the related AC waveforms in a power system. Concept diagram: Identify the device and form → Read the connections and state → Check the equipment reference A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram. - [Autodesk IEEE Symbol Preview — Miscellaneous](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-34282BFD-7B8E-48F3-A6ED-93ADBDDDFBD3.htm) ## What it represents This reference locates single-phase ac source in Autodesk's IEEE-oriented miscellaneous family. A single-phase AC source identifies a documented source boundary in a schematic or SLD. The source label and supply data explain what provides the circuit's voltage and frequency. The public library uses HPW1_1PH for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number. Use the surrounding circuit labels and the project legend to identify the intended operating condition and connection. Carry the same device reference into the schedule or equipment document so the symbol can be reconciled with its real terminals, function and operating limits. Determine whether the source is a utility connection, transformer winding or auxiliary source. A source-boundary symbol is not a product-specific generator or transformer diagram. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted. ## How to read it - Determine whether the source is a utility connection, transformer winding or auxiliary source. - The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation. ## Information to show or reference - Name source origin - State voltage/frequency - Show conductor and neutral arrangement ## Important distinction A source-boundary symbol is not a product-specific generator or transformer diagram. ## Facts - Convention evidence: Autodesk IEEE Symbol Preview: Miscellaneous; published form: Power Source 1 Phase. - Public vendor block: HPW1_1PH. Vendor library token, not an IEEE symbol number. - Drawing role: Supply or network role - Identifier status: The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name. - Artwork scope: Original educational geometry. Exact standard graphics, product ratings and terminal pinouts are not certified. ## Public references - [Autodesk IEEE Symbol Preview — Miscellaneous](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-34282BFD-7B8E-48F3-A6ED-93ADBDDDFBD3.htm) — Autodesk. Public IEEE-oriented Miscellaneous table explicitly lists HPW1_1PH as Power Source 1 Phase. This supports the vendor convention context, not reproduction of the publisher graphic. ## Graphic scope Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.