![]() ![]() You will see that Southwire and Paige calculators give similar results.ġ. Here we give examples and compare the results of using two example wire size and voltage drop calculators. How to Use a Voltage Drop Calculator to Determine Required Service Entry Wire Size Be sure you review your work plan with your local electrical inspector and that work is done to the electrical code for the country and city where you live. Watch out: if you are not trained and qualified to install electrical wiring a mistake can result in fire, injury, or death. The table below shows Aluminum SEC wire sizes for various run lengths - be sure to see the additional assumptions in the table notes.Īluminum SEC Wire Size for Long Runs for 200A Service Detailed Aluminum SEC Cable Sizes for Long Wire Runs Watch out: the engineering work and derivation of the table above is derived from the sources listed below including manufacturer's tables and online voltage drop calculators but may not be correct for your specific installation. ![]() See SE CABLE & BRANCH CIRCUIT WIRE SIZES vs AMPS For smaller wire size ampacities & run lengths (#14 copper or #12 aluminum) up through typical residential SEC wire sizes and amps.NM-B, UF-B copper wire, the maximum run lengths will be substantially shorter. Watch out: Note that dropping to 60☌ (140☏) The Amperage rating and distances shown are for 90☌ (194☏) Maximum wire run distance changes by required temperature rating:.See this ELECTRIC WIRE AMPACITY CHART from CerroWire, retrieved 5 original source:.Conductor installation is direct-buried, in conduit, OR overhead, unless otherwise noted.Electrical Panel & Service Size: 200A 240VAC, Ending amps if voltage drop were 3% will be 194A.The voltage drop is held to under 3% across the long distance wire runs in these tables.Ĭopper SEC Wire Size for Long Runs for 200A Service The table below shows Copper SEC wire sizes for various run lengths - be sure to see the additional assumptions in the table notes. Calculated by Online voltage drop calculator: 3, Southwire, Tel: 1-80 Website: Email: Web page: ĭetailed Copper SEC Sizes for Longer Cable Distances ![]()
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