Electrical Wire Diameter With Insulation

Wire cross sectional area calculations.

Electrical wire diameter with insulation.

The smaller the awg number the larger the wire and generally speaking the more current the wire can carry without overheating. The n gauge wire diameter d n in millimeters mm is equal to 0 127mm times 92 raised to the power of 36 minus gauge number n divided by 39. Mm size with thw thhw tw insulation with tfn thhn thwn insulation uninsulated conductors range min. Wire size relates to the diameter of the metal conductor of the wire excluding any insulation.

The wire size chart below shows allowable ampacities of insulated conductors rated up to and including 2000 volts 60 c through 90 c 140 f through 194 f not more than three current carrying conductors in raceway cable or earth directly buried based on ambient air temperature of 30 c 86 f. Wire size is measured by the american wire gauge awg system. In the wire size table below give the typical diameter of 14 copper wire as 2 05 to 2 32 mm or about 0 081 0 092 inches. The insulated wire weight data is only indicative and can vary from that given here.

Some ideas for using the. Typical outside diameter of insulation on 600v industrial wire thhn thwn or thwn 2 90c 75c 600 volt pvc insulation with nylon outer jacket wire size stranding. It is important because the size along with the wire material and a few other factors determines how much electrical current the wire can safely carry. Wire gauge refers the physical size of the wire rated with a numerical designation that runs opposite to the diameter of the conductors in other words the smaller the wire gauge number the larger the wire diameter.

This wire size calculator will calculate the appropriate wire gauge for a circuit based on amps voltage distance and load. Please ask for the size of your interest. Insulation select the thermal rating of the insulation on the wire. D n mm 0 127 mm 92 36 n 39.

Approximate wire outside diameter in. Many other special sizes with bunched strands are also available. If in doubt measure the actual material with a micrometer or us a gauge plate as illustrated at right. 24 awg 0 059 1 5 0 088 2 2 0 020 0 5 0 024 0 6 22 awg 0 066 1 7 0 094 2 4 0 025 0 6 0 031 0 8 20 awg 0 071 1 8 0 101 2 6 0 032 0 8 0 038 1 0 18 awg 0 084 2 1 0 111 2 8 0 040 1 0 0 049 1 2.

Common sizes include 14 12 10 8 6 and 2 gauge wire. Wire is sized by the american wire gauge awg system. You need to know the finished diameter of an insulated wire you must consult the manufacturer concerned as all manufacturers differ on this factor. The actual wire diameter of 14 copper wire can vary among manufacturers and wire types.

National electrical code table 310 15 b 16 17.