Cable Size Chart

The results from Google search indicate that knowing the right cable size is essential for ensuring electrical safety and functionality. A cable size chart provides information about different cable ratings, including the appropriate size for your specific needs in automotive applications.

Utilizing the Gauge Guide can assist you in determining the complete size (including insulation) of an unmarked wire. For further insights, feel free to explore Mingda.

Keep in mind that actual diameters can fluctuate based on the age, make, and insulation thickness of your wire. Be sure to refer to our Printable Version PDF to more accurately measure the cable ends against the Gauge Guide.

If you remain uncertain, measuring the area in mm² of the copper conductors is the most precise approach. For instance, to find the area of a 3mm auto cable, consider these steps:

• Count the total number of strands. (14)
• Measure the diameter of one strand. (0.32)

With 14 strands at 0.32mm each, we conduct the following calculations:

• Square (multiply by itself) the diameter of each strand (0.32 × 0.32 = 0.1024).
• Multiply this result by (Pi) 3.14 (0.1024 × 3.14 = 0.3217).
• Divide this result by 4 (0.3217/4 = 0.0804).
• Multiply this result by the number of strands (0.0804 × 14 = 1.1256).

Thus, the approximate area for a 3mm auto cable is:

• 1.13 mm²

Single Core Automotive

Auto Size

Nom Area mm²

Nom O.D. mm

Amp Rating

Part # Prefix

Gauge Guide

• 3mm
• 1.13
• 2.2
• 20
• C16

• 4mm
• 1.84
• 2.6
• 28
• C14

• 5mm
• 2.90
• 3.0
• 37
• C12

• 6mm
• 4.59
• 4.0
• 48
• C10

Thin Wall Single Core Automotive

• Auto Size
• Nom Area mm²
• Nom O.D. mm
• Amp Rating
• Part # Prefix
• Gauge Guide

• 2mm
• 0.5
• 1.5
• 10
• C18TW

• 3mm
• 1.0
• 2.0
• 15
• C16TW

• 4mm
• 2.0
• 2.55
• 20
• C14TW

Double Insulated (Gas) Automotive

• Auto Size
• Nom Area mm²
• Nom O.D. mm
• Amp Rating
• Part # Prefix
• Gauge Guide

• 3mm
• 1.13
• 3.8
• 20
• C16DI

• 4mm
• 1.84
• 4.2
• 28
• C14DI

• 5mm
• 2.90
• 4.9
• 37
• C12DI

• 6mm
• 4.59
• 5.7
• 48
• C10DI

High Tension Automotive

• Auto Size
• Nom Area mm²
• Nom O.D. mm
• Amp Rating
• Part # Prefix
• Gauge Guide

• 3mm
• 1.13
• 7.0
• 20
• C7HT

Figure 8

• Auto Size
• Nom Area mm²
• Nom O.D. mm
• Amp Rating
• Part # Prefix
• Gauge Guide

• 2 x 2mm
• 0.44
• 2.4 x 4.8
• 2.5
• C20T

• 2 x 2.5mm
• 0.75
• 2.6 x 5.1
• 5
• C18T

• 2 x 3mm
• 1.13
• 2.6 x 5.9
• 10
• C16T

• 2 x 4mm
• 1.84
• 3.1 x 6.7
• 15
• C14T

Twin Sheath Automotive

• Auto Size
• Nom Area mm²
• Nom O.D. mm
• Amp Rating
• Part # Prefix
• Gauge Guide

• 2 x 2mm
• 0.56
• 3.1 x 5.1
• 8
• C2/18

• 2 x 3mm
• 1.13
• 3.3 x 5.5
• 16
• C2/16

• 2 x 4mm
• 1.84
• 3.8 x 6.3
• 22
• C2/14

• 2 x 5mm
• 2.90
• 4.5 x 7.4
• 29
• C2/12

• 2 x 6mm
• 4.59
• 5.7 x 9.6
• 38
• C2/10

• 2 x 8 B&S
• 7.71
• 7.1 x 12.5
• 59
• C2/8

• 2 x 6 B&S
• 13.5
• 8.8 x 16
• 82
• C2/6

• 2 x 2 B&S
• 32.07
• 13.4 x 24.6
• 150
• C2/2

Multi-Core Sheathed Automotive

• Auto Size
• Nom Area mm²
• Nom O.D. mm
• Amp Rating
• Part # Prefix
• Gauge Guide

• 3 x 3mm
• 1.13
• 5.7
• 14
• C3/16

• 3 x 4mm
• 0.92
• 6.7
• 12
• C4/16

• 5 x 2mm
• 0.56
• 6.0
• 7
• C5/18

• 5 x 3mm
• 1.13
• 4.0
• 11
• C5/16

• 5 x 4mm
• 1.84
• 8.2
• 15
• C5/14

• 7 x 2mm
• 0.56
• 6.7
• 5
• C7/18

• 7 x 3mm
• 1.13
• 7.7
• 10
• C7/16

• 7 x 4mm
• 1.84
• 8.9
• 14
• C7/14

• 2 x 6mm
• 1 x 5mm
• 1 x 3mm
• 4.59
• 2.90
• 1.13
• 10
• 38
• 37
• 20
• C4/

Security/Data

• Auto Size
• Nom Area mm²
• Nom O.D. mm
• Amp Rating
• Part # Prefix
• Gauge Guide

• -
• 0.44
• 6.3
• 3
• C SEC.

• -
• 0.75
• 6.8
• 6
• C2SC24/.2

• -
• 0.50
• 5.8
• 3
• C2SC7/.3-100

• -
• 0.44
• 4.8
• 3
• C4/SEC.5/100

Battery Automotive

• Auto Size
• Nom Area mm²
• Nom O.D. mm
• Amp Rating
• Part # Prefix
• Gauge Guide

• 8 B&S
• 7.71
• 5.5
• 74
• C8

• 6 B&S
• 13.5
• 7.2
• 103
• C6

• 4 B&S
• 20.26
• 8.3
• 135
• C4

• 3 B&S
• 26.45
• 10.2
• 168
• C3

• 2 B&S
• 32.07
• 11.3
• 188
• C2

• 1 B&S
• 39.55
• 12.1
• 210
• C1

• 0 B&S
• 49.00
• 12.7
• 246
• C0

• 00 B&S
• 64.15
• 14.5
• 292
• C00

• 000 B&S
• 83.19
• 16.4
• 335
• C000

Silicone (150°C)

• Auto Size
• Nom Area mm²
• Nom O.D. mm
• Amp Rating
• Part # Prefix
• Gauge Guide

• -
• 1.0
• 2.8
• 10
• C32/.2

• -
• 1.5
• 3.3
• 15
• C30/.25

For additional details, please check out Type W Portable Power Cables.