1 The load current rating and the overcurrent protection for conductor types shall not exceed 15 amperes for 14 AWG, 20 amperes for 12 AWG, and 30 amperes for 10 AWG aluminum and copper-clad aluminum after any correction factors for ambient temperature and number of conductors have been applied. 100 amps X 83% = 83 amps. © 2021 The smallest AWG size is 40 and the largest is 0000 (4/0). A 100 amp electrical service will be used to supply the 98 amp load for the single family dwelling. I have a Kicker CX300.1 and KX400.4. Pipe sizes are nominal; for copper wires. Privacy Policy, Maximum Allowable Ampacities for Conductors in Free Air (30°C), Maximum Allowable Ampacities for Conductors in Raceway, Cable or Earth (40°C), Maximum Allowable Ampacities for Conductors in Free Air (40°C), Distance Between Conduit Supports Calculator, Time Overcurrent Relay Operate Time Calculator, Maximum Wire Ampacity for Current-Carrying Conductors in Raceway 30°C Table, Maximum Wire Ampacity for Current-Carrying Conductors in Free Air 30°C Table, Maximum Wire Ampacity for Current-Carrying Conductors in Raceway 40°C Table, Maximum Wire Ampacity for Current-Carrying Conductors in Free Air 40°C Table, Full-Load Current for Three-Phase AC Motors Table, Three-Phase AC Motor Wire Sizes and Circuit Protection Table, Distance Between Rigid Conduit Supports Table. American Wire Gauge Conductor Size Table. Electrical current is measured in ampacity, and each wire gauge has a maximum safe carrying capacity. Because it’s pretty well meaningless. The smallest AWG size is 40 and the largest is 0000 (4/0). AWG general rules of thumb – for every 6 gauge decrease, the wire diameter doubles and for every 3 gauge decrease, the cross sectional area doubles. Table of Common Electrical Wire Sizes and Amps or Fuse Ratings - Residential SEC Cable & Other Wire Ampacities for 1-3 Current-Carrying Conductors in Cable, Earth, or Raceway For 120/240-volt systems sized between 100 and 400 amperes: Electrical Conductor Wire Size or Gauge - AWG or kcmil: AMPACITY Rating COPPER Wire Conductors And always use a fuse smaller than the rating of the wire to prevent fires. 1.37 mm diameter = 1.5 mm 2 = 15 Amp 3. current electrical wire. In conventional home electrical systems (120/240 volts ac), wire is sized primarily for safe amperage carrying capacity (ampacity). #8: 45 A. The floodlights draw 15 amps of current. AUTOMOTIVE Wire Amperage Capacity Chart Recommended Length and Amperage for Automotive Wire while maintaining a 2% or less voltage drop at 12 volts Automotive Wire Size 5 Amps 10 Amps 15 Amps 20 Amps 25 Amps 30 Amps 20 Gauge Wire (AWG) 4.5 ft 2.2 ft 1.6 ft . Electrical Service Conductor Cable Sizes & Amps Ratings for Service Conductors in Conduit: Service AMPS-USA: Rigid non-metallic conduit or iron pipe diam. What Gauge AWG Wire to Use for Solar Electric Systems. 30: 3/4" 1" in Canada. 1 The load current rating and the overcurrent protection for conductor types shall not exceed 15 amperes for 14 AWG, 20 amperes for 12 AWG, and 30 amperes for 10 AWG aluminum and copper-clad aluminum after any correction factors for ambient temperature and number of conductors have been applied. Outside engine compartments, the ambient temperature should generally be 20°C. #10: 30 A. You must use the correct size wire for the current (load) requirement of the circuit to prevent the wire from overheating. Romex size for Amperage ratings; Answer: Romex size will depend on the amperage requirement of the appliance. Most electric ranges draw from 30 to 50 amps of current, depending on the size and the features. Let us know how we can improve. Because they draw more current, 240-volt appliances require a minimum wire size of 10 AWG. determine correct wire gauge in the intersection of amps and feet; Note! AMPACITY Rating ALUMINUM. Ampacity is the maximum current that a conductor can carry continuously under the conditions of use without exceeding its temperature rating. Automotive wiring is not exactly 12 volt. This should be sufficient for most domestic socket and lighting circuits. Then measure the distance that the wire will travel (length) including the length of the return to ground (the ground wire running to the chassis or back to a ground block or battery. 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