Let’s understand Cable and Wire Sizes

When it comes to electrical wiring, choosing the right cable size is not just about performance — it’s about safety, reliability, and efficiency.

At JUAA, we ensure that every cable we manufacture aligns with global standards to meet your expectations.

Globally, two major systems define:

IEC 60228 (International Standard – mm² Based)

The International Electrotechnical Commission (IEC) specifies standard conductor sizes based on the cross-sectional area in square millimeters (mm²).

The typical sizes used in most parts of the world are:

Size (mm²)	Typical Applications
0.5	Light circuits, control wiring
0.75	Lighting, small appliances
1.0	Lighting, small power circuits
1.5	Power circuits, lighting circuits
2.5	Domestic power outlets, general wiring
4.0	High-power circuits, air conditioners
6.0	Industrial use, heavy appliances
10.0+	Industrial heavy-duty applications

The IEC standard also allows conductor sizes up to 1000 mm² for specialized heavy industrial needs.

AWG (American Wire Gauge – U.S. Standard)

In the United States and some other regions, the AWG system is used.
Here, the larger the AWG number, the thinner the wire.
A rough idea:

Metric AWG Conversion

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			Number strands/diameter per strand		Approximate overall diameter
mm²	Awg	Circ.Mils	inch	mm	inch	mm
0.5		987	1/.032	1/.813	0.032	0.81
	20	1020	7/.0121	7/.307	0.036	0.91
0.75		1480	1/.039	1/.991	0.039	0.99
	18	1620	1/.0403	1/1.02	0.04	1.02
	18	1620	7/.0152	7/.386	0.046	1.16
1		1974	1/.045	1/1.14	0.045	1.14
1		1974	7/.017	7/.432	0.051	1.3
	16	2580	1/.0508	1/1.29	0.051	1.29
	16	2580	7/.0192	7/.488	0.058	1.46
1.5		2960	1/.055	1/1.40	0.055	1.4
1.5		2960	7/.021	7/.533	0.063	1.6
	14	4110	1/.0641	1/1.63	0.064	1.63
	14	4110	7/.0242	7/.615	0.073	1.84
2.5		4934	1/.071	1/1.80	0.071	1.8
2.5		4934	7/.027	7/.686	0.081	2.06
	12	6530	1/.0808	1/2.05	0.081	2.05
	12	6530	7/.0305	7/.775	0.092	2.32
4		7894	1/.089	1/2.26	0.089	2.26
4		7894	7/.034	7/.864	0.102	2.59
	10	10380	1/.1019	1/2.59	0.102	2.59
	10	10380	7/.0385	7/.978	0.116	2.93
6		11840	1/.109	1/2.77	0.109	2.77
6		11840	7/.042	7/1.07	0.126	3.21
	9	13090	1/.1144	1/2.91	0.1144	2.91
	9	13090	7/.0432	7/1.10	0.13	3.3
	8	16510	1/.1285	1/3.26	0.128	3.26
	8	16510	7/.0486	7/1.23	0.146	3.7
10		19740	1/.141	1/3.58	0.141	3.58
10		19740	7/.054	7/1.37	0.162	4.12
	7	20820	1/.1443	1/3.67	0.144	3.67
	7	20820	7/.0545	7/1.38	0.164	4.15
	6	26240	1/.162	1/4.11	0.162	4.11
	6	26240	7/.0612	7/1.55	0.184	4.66
16		31580	7/.068	7/1.73	0.204	5.18
	5	33090	7/.0688	7/1.75	0.206	5.24
	4	41740	7/.0772	7/1.96	0.232	5.88
25		49340	7/.085	7/2.16	0.255	6.48
25		49340	19/.052	19/1.32	0.26	6.6
	3	52620	7/.0867	7/2.20	0.26	6.61
	2	66360	7/.0974	7/2.47	0.292	7.42
35		69070	7/.100	7/2.54	0.3	7.62
35		69070	19/.061	19/1.55	0.305	7.75
	1	83690	19/.0664	19/1.69	0.332	9.43
50		98680	19/.073	19/1.85	0.365	9.27
	1/0	105600	19/.0745	19/1.89	0.373	9.46
	2/0	133100	19/.0837	19/2.13	0.419	10.6
70		138100	19/.086	19/2.18	0.43	10.9
	3/0	167800	19/.094	19/2.39	0.47	11.9
	3/0	167800	37/.0673	37/1.71	0.471	12
95		187500	19/.101	19/2.57	0.505	12.8
95		187500	37/.072	37/1.83	0.504	12.8
	4/0	211600	19/.1055	19/2.68	0.528	13.4
120		237.8mcm	37/.081	37/2.06	0.567	14.4
		250mcm	37/.0822	37/2.09	0.575	14.6
150		300mcm	37/.090	37/2.29	0.63	16
		350mcm	37/.0973	37/2.47	0.681	17.3
185		365.1mcm	37/.100	37/2.54	0.7	17.8
		400mcm	37/.104	37/2.64	0.728	18.5
240		473.6mcm	37/.114	37/2.90	0.798	20.3
240		473.6mcm	61/.089	61/2.26	0.801	20.3
		500mcm	37/.1162	37/2.95	0.813	20.7
		500mcm	61/.0905	61/2.30	0.814	20.7
300		592.1mcm	61/.099	61/2.51	0.891	22.6
		600mcm	61/.0992	61/2.52	0.893	22.7
		700mcm	61/.1071	61/2.72	0.964	24.5
		750mcm	61/.1109	61/2.82	0.998	25.4
		750mcm	91/.0908	91/2.31	0.999	25.4
400		789.4mcm	61/.114	61/2.90	1.026	26.1
		800mcm	61/.1145	61/2.91	1.031	26.2
		800mcm	61/.0938	91/2.38	1.032	26.2
500		1000mcm	61/.1280	61/3.25	1.152	29.3
		1000mcm	91/.1048	91/2.66	1.153	29.3
625		1233.7mcm	91/.117	91/2.97	1.287	32.7
		1250mcm	91/.1172	91/2.98	1.289	32.7
		1250mcm	127/.0992	127/2.52	1.29	32.8
		1500mcm	91/.1284	91/3.26	1.412	35.9
		1500mcm	127/.1087	127/2.76	1.413	35.9
800		1578.8mcm	91/.132	91/3.35	1.452	36.9
1000		1973.5mcm	91/.147	91/3.73	1.617	41.1
		2000mcm	127/.1255	127/3.19	1.632	41.5
		2000mcm	169/.1088	169/2.76	1.632	41.5

Why Correct Cable Sizing Matters

Efficiency: Correct sizing minimizes energy loss.

Safety: Prevents overheating and fire risks.

Performance: Ensures stable and reliable operation.

Longevity: Reduces wear and tear over time.

At JUAA, every cable, whether used for CCTV, desktops, or industrial applications, is carefully crafted following these international sizing standards.
We believe that the core strength of a cable defines the strength of your entire system.

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Conclusion

Choosing the correct wire size isn’t a small decision — it’s the foundation of a safe, efficient, and long-lasting setup.
Trust JUAA Cables for precision, performance, and peace of mind.

Explore our complete range of premium cables today!

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