Mm2 Wire Size Amp Rating Chart

The gauge guide bullets will help you determine the overall size including insulation of an unmarked cable.

Mm2 wire size amp rating chart. Actual diameters may vary depending on the age make and insulation thickness of your cable. Nfpa 70 national electrical code table 310 15 b 16 size 60 c 140 f 75 c 167 f 90 c 194 f 60 c 140 f 75 c 167 f 90 c 194 f size. Iso ratings for metric wire are slightly less than these values derived from abyc vi a ratings. Check out our printable version pdf to more accurately measure the end of your cable against gauge guide bullets.

The circular piece of wire. Size of types thwn and thhn. Wire size is usually identified as the area of the conductor in square millimeters. The higher the gauge number the smaller the.

Where it is intended to connect the cables in this table to equipment or accessories designed to operate at a temperature lower than the maximum operating temperature of the cable the cables should be rated at the maximum operating temperature of the equipment or accessory see regulation 512 1 5. Awg or kcmil types tw uf types rhw thw thwn types tbs sa sis types tw uf types rhw thw thwn types tbs sa sis awg or. Check back soon to download our mm to awg conversion pdf. The following sizes are for 60ºc insulation.

120 240 volt 3 wire single phase service entrance conductors service lateral conductors and feeder conductors that serve as the main power feeder. Wires carrying intermittent currents no more than rating per vi a and for less than one minute per mm of diameter and not repeating more often than a delay of 5 times active duration. Wire size chart and maximum amp ratings. Or kcmil kcmil rating amperes 4 2 100.

National electrical code ansi nfpa 70 1999. 1 76 mm diameter 2 5 mm 2 21 amp 4. Common us awg wire gauges and amps ratings. The tables below are intended to be a general guide for wire size and amp ratings.

Wires counted in bundles need not include. As we have established above how you identify electrical cable size is through the size of wire it houses e g 1 5mm cable houses 1 5mm wire. In most instances the size of cable should be printed on the sheath but if not you will need to calculate the diameter of the wire to determine its size which means working out the area of a circle e g. 60 c 140 f 75 c 167 f awg mm copper.

2 24 mm diameter 4 0 mm 2 26 amp 5. Values are for not more than three conductors in raceway or cable reference. Amperage amps versus wire cable size mm to awg ul486e assigned maximum ampere rating versus wire size for copper conductors. 1 37 mm diameter 1 5 mm 2 15 amp 3.