Minimum Copper Wire Size: #6 – (Wire Types THW, THHN, THWN are Rated at 65 Amps). Thanks Frank Please email answer to: Fmcmahon@co.dutchess.ny.us hello, I am wiring a 240v compressor with a 17 amp motor. 1.15, Continuous duty rating, and the specification plate indicates it is a compressor duty motor. I have a light industrial air compressor with a single phase, capacitor-start, capacitor-run, A.O. Wire Size Awg No. Jeff, from what you have described I have come up with the following: Based upon a 7 1/2 HP Motor, 240Volt, Single Phase: Full Load Current: 40 Amps. Hi, What size wire and breaker are needed for a 5Hp, 20Amp 230 V motor on an air compressor? HP .5 HP .75 HP 1 HP 1.5 HP 2 HP 3 HP 5 HP Pump Wire Configuration 2 Wire 3 Wire Phase 1 ∅ 3 ∅ Site Voltage 115V 230V Clear filter Cross reference the distance from your pump to the electrical service entrance to determine the correct gauge. Dual Element, Time Delay UL Class RK5 Fuse (Used with Properly Sized O/L Relay) Circuit Breaker (Instantaneous Trip Circuit Breaker) Continuous Amp Rating SINGLE PHASE UNITS ½ 115V 8.4 14 15A 15A ½ 208V / 230V 4.4 / 4.2 14 8A / 7A 7A ¾ 115V 11 12 15A 15A ¾ 208V/ 230V 5.5 / 5.4 14 12A / 10A 15A Low voltage can cause the motor to fail. I already have 220 to the box with 8 gage. Motors should be fused with a time-delay fuse rated 175% of the motor's full load ... 1/3 HP 5.6 AMP 15 AMP 505 FT 806 FT 1285 FT 2036 FT 3246 FT 5154 FT 781 FT 1237 FT 1968 FT 3134 FT what wire size , type , and conduit size ,and amp breaker do I need . 1) can I use 12-3 romex . Also, what is the best way to wire between the pressure switch and the panel box when the compressor will be 10-15 feet away? Consider the following: On start up the compressor motor draws much more current than when the motor is up and running; The distance from the electrical panel to the outlet where the compressor is plugged in must be added to the overall wire length And I have a double 20 amp breaker plus I will be about 4' … And the maximum breaker size (MOCP) is dictated by the following article from the 2017 NEC. Smith Century AC Motor, R56 Horizontal frame, 5 HP, 208-230 VAC, 22.0 Amp, kVA/HP Code G, S.F. what size wire do I need for 5 hp air compressor? I know this topic has been covered before but the more information I get the more confused I am. Find the correct wire size for your pump. 2) I will wire it to the fuse box with a 20 amp breaker. 440.32 Single Motor-Compressor — Branch-circuit conductors supplying a single-motor compressor shall have an ampacity not less than 125 percent of either the motor compressor-rated load current or the branch-circuit selection current, whichever is greater. 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