Minimum Copper Wire Size: #6 – (Wire Types THW, THHN, THWN are Rated at 65 Amps). 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 Wire Size Awg No. Low voltage can cause the motor to fail. I have a Ingersoll Rand air compressor it is a 5hp 230 volt 1 phase compressor I would like to run the power feeds to the compressor inside PVC conduit about 45' away from the service panel . The charts below contain recommended minimum wire size (AWG) for different voltage, horsepower and cable length combinations. Thanks Frank Please email answer to: Fmcmahon@co.dutchess.ny.us 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. I have a light industrial air compressor with a single phase, capacitor-start, capacitor-run, A.O. hello, I am wiring a 240v compressor with a 17 amp motor. 2) I will wire it to the fuse box with a 20 amp breaker. 1.15, Continuous duty rating, and the specification plate indicates it is a compressor duty motor. what wire size , type , and conduit size ,and amp breaker do I need . voltage drops considerably, the wire size is too small. 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. These charts are only a guide. Hi, What size wire and breaker are needed for a 5Hp, 20Amp 230 V motor on an air compressor? Thermal Magnetic Trip Rating: 80 Amps. 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? And I have a double 20 amp breaker plus I will be about 4' … 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 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. 1) can I use 12-3 romex . Find the correct wire size for your pump. I know this topic has been covered before but the more information I get the more confused I am. 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